diff --git a/manager/systemd/nexus-manager.service b/manager/systemd/nexus-manager.service
index 2434503..ad9a36f 100644
--- a/manager/systemd/nexus-manager.service
+++ b/manager/systemd/nexus-manager.service
@@ -28,6 +28,10 @@ Environment=NEXUS_SERVER_HOST=127.0.0.1
 
 # ─── Security (CHANGE THIS) ────────────────────────────────────────────────
 Environment=MANAGER_JWT_SECRET=change-me-to-a-random-64-char-hex-string
+Environment=INTERNAL_API_KEY=c58db62766712e618a881dbe8de580960812e57a069ef92c9dd00e7e69158cb2
+
+# ─── POS Internal API (for WhatsApp bridge orchestration) ──────────────────
+Environment=POS_INTERNAL_URL=http://192.168.10.91:5001
 
 # ─── Redis (optional, health check only) ───────────────────────────────────
 Environment=REDIS_URL=redis://127.0.0.1:6379/0
diff --git a/pos/app.py b/pos/app.py
index dcfa09b..112186e 100644
--- a/pos/app.py
+++ b/pos/app.py
@@ -59,6 +59,9 @@ def create_app():
     from blueprints.marketplace_bp import marketplace_bp
     app.register_blueprint(marketplace_bp)
 
+    from blueprints.marketplace_external_bp import marketplace_ext_bp
+    app.register_blueprint(marketplace_ext_bp)
+
     from blueprints.peer_bp import peer_bp
     app.register_blueprint(peer_bp)
 
@@ -180,6 +183,14 @@ def create_app():
     def pos_marketplace():
         return render_template('marketplace.html')
 
+    @app.route('/pos/marketplace-external')
+    def pos_marketplace_external():
+        return render_template('marketplace_external.html')
+
+    @app.route('/pos/marketplace-external/callback')
+    def pos_marketplace_external_callback():
+        return render_template('marketplace_external.html')
+
     @app.route('/pos/static/<path:filename>')
     def pos_static(filename):
         return send_from_directory('static', filename)
diff --git a/pos/blueprints/accounting_bp.py b/pos/blueprints/accounting_bp.py
index be611c2..373fa00 100644
--- a/pos/blueprints/accounting_bp.py
+++ b/pos/blueprints/accounting_bp.py
@@ -741,3 +741,45 @@ def close_period():
         cur.close()
         conn.close()
         return jsonify({'error': str(e)}), 500
+
+
+@accounting_bp.route('/stats', methods=['GET'])
+@require_auth('accounting.read')
+def api_accounting_stats():
+    """Return counts for tab badges: receivables (asset accounts with balance) and payables (liability accounts with balance)."""
+    conn = get_tenant_conn(g.tenant_id)
+    cur = conn.cursor()
+
+    # Count asset accounts with positive balance (cuentas por cobrar)
+    cur.execute("""
+        SELECT COUNT(*) FROM (
+            SELECT a.id
+            FROM accounts a
+            LEFT JOIN journal_entry_lines l ON l.account_id = a.id
+            WHERE a.type = 'activo' AND a.is_active = true
+            GROUP BY a.id
+            HAVING COALESCE(SUM(l.debit), 0) - COALESCE(SUM(l.credit), 0) > 0
+        ) x
+    """)
+    cxc = cur.fetchone()[0] or 0
+
+    # Count liability accounts with positive balance (cuentas por pagar)
+    cur.execute("""
+        SELECT COUNT(*) FROM (
+            SELECT a.id
+            FROM accounts a
+            LEFT JOIN journal_entry_lines l ON l.account_id = a.id
+            WHERE a.type = 'pasivo' AND a.is_active = true
+            GROUP BY a.id
+            HAVING COALESCE(SUM(l.credit), 0) - COALESCE(SUM(l.debit), 0) > 0
+        ) x
+    """)
+    cxp = cur.fetchone()[0] or 0
+
+    cur.close()
+    conn.close()
+
+    return jsonify({
+        'cuentas_cobrar': cxc,
+        'cuentas_pagar': cxp,
+    })
diff --git a/pos/blueprints/catalog_bp.py b/pos/blueprints/catalog_bp.py
index a466b82..ef4c9fe 100644
--- a/pos/blueprints/catalog_bp.py
+++ b/pos/blueprints/catalog_bp.py
@@ -35,6 +35,25 @@ def _oem_blocked():
     return None
 
 
+def _get_allowed_brands(tenant_conn):
+    """Read allowed part brands from tenant_config. Returns list or None."""
+    import json
+    cur = tenant_conn.cursor()
+    try:
+        cur.execute("SELECT value FROM tenant_config WHERE key = 'allowed_part_brands'")
+        row = cur.fetchone()
+        if row and row[0]:
+            try:
+                brands = json.loads(row[0])
+                if isinstance(brands, list) and brands:
+                    return brands
+            except (json.JSONDecodeError, ValueError):
+                pass
+    finally:
+        cur.close()
+    return None
+
+
 def _with_conns(fn):
     """Helper: open master + tenant connections, call fn, close both.
     fn receives (master_conn, tenant_conn, branch_id).
@@ -71,6 +90,32 @@ def _master_only(fn):
             except: pass
 
 
+def _filter_parts_by_allowed_brands(master_conn, parts_data, allowed_brands):
+    """Filter a list of part dicts to only include those with aftermarket equivalents
+    from allowed brands. parts_data items must have 'id_part' or 'id' key."""
+    if not allowed_brands or not parts_data:
+        return parts_data
+    part_ids = []
+    for p in parts_data:
+        pid = p.get('id_part') or p.get('id')
+        if pid is not None:
+            part_ids.append(pid)
+    if not part_ids:
+        return parts_data
+    cur = master_conn.cursor()
+    try:
+        cur.execute("""
+            SELECT DISTINCT ap.oem_part_id
+            FROM aftermarket_parts ap
+            JOIN manufacturers m ON m.id_manufacture = ap.manufacturer_id
+            WHERE ap.oem_part_id = ANY(%s) AND UPPER(m.name_manufacture) = ANY(%s)
+        """, (part_ids, allowed_brands))
+        allowed_ids = {r[0] for r in cur.fetchall()}
+    finally:
+        cur.close()
+    return [p for p in parts_data if (p.get('id_part') or p.get('id')) in allowed_ids]
+
+
 # ─── Hierarchy navigation (master DB only) ───
 
 @catalog_bp.route('/brands', methods=['GET'])
@@ -150,13 +195,14 @@ def categories():
     mode = normalize_mode(request.args.get('mode'))
     if not mye_id:
         return jsonify({'error': 'mye_id required'}), 400
-    def _do(master):
+    def _do(master, tenant, branch_id):
+        allowed_brands = _get_allowed_brands(tenant) if tenant else None
         if mode == 'local':
             data = catalog_service.get_nexpart_groups_for_vehicle(master, mye_id)
         else:
-            data = catalog_service.get_categories(master, mye_id)
-        return jsonify({'data': data, 'mode': mode})
-    return _master_only(_do)
+            data = catalog_service.get_categories(master, mye_id, allowed_brands)
+        return jsonify({'data': data, 'mode': mode, 'allowed_brands': allowed_brands or []})
+    return _with_conns(_do)
 
 
 @catalog_bp.route('/groups', methods=['GET'])
@@ -317,6 +363,7 @@ def parts():
             return blocked
 
     def _do(master, tenant, branch_id):
+        allowed_brands = _get_allowed_brands(tenant) if tenant else None
         if use_nexpart_nav:
             result = catalog_service.get_parts_for_nexpart_triple(
                 master, mye_id, nexpart_group, nexpart_subgroup, nexpart_part_type,
@@ -330,6 +377,9 @@ def parts():
             result = catalog_service.get_parts(
                 master, mye_id, group_id, tenant, branch_id, page, per_page, part_type=part_type,
             )
+        if allowed_brands:
+            result['data'] = _filter_parts_by_allowed_brands(master, result.get('data', []), allowed_brands)
+        result['allowed_brands'] = allowed_brands or []
         return jsonify(result)
     return _with_conns(_do)
 
@@ -358,8 +408,11 @@ def search():
     limit = request.args.get('limit', 50, type=int)
     mye_id = request.args.get('mye_id', type=int)
     def _do(master, tenant, branch_id):
+        allowed_brands = _get_allowed_brands(tenant) if tenant else None
         data = catalog_service.smart_search(master, q, tenant, branch_id, limit, mye_id)
-        return jsonify({'data': data})
+        if allowed_brands:
+            data = _filter_parts_by_allowed_brands(master, data, allowed_brands)
+        return jsonify({'data': data, 'allowed_brands': allowed_brands or []})
     return _with_conns(_do)
 
 
@@ -635,10 +688,20 @@ def brand_categories():
     if not brand:
         return jsonify({'error': 'brand parameter required'}), 400
 
-    def _query(master):
+    def _query(master, tenant, branch_id):
         cur = master.cursor()
         try:
-            cur.execute("""
+            allowed_brands = _get_allowed_brands(tenant) if tenant else None
+            brand_filter = ""
+            params = [brand]
+            if allowed_brands:
+                brand_filter = """AND EXISTS (
+                    SELECT 1 FROM aftermarket_parts ap2
+                    JOIN manufacturers m2 ON m2.id_manufacture = ap2.manufacturer_id
+                    WHERE ap2.oem_part_id = p.id_part AND UPPER(m2.name_manufacture) = ANY(%s)
+                )"""
+                params.append(allowed_brands)
+            cur.execute(f"""
                 SELECT pc.id_part_category,
                        COALESCE(NULLIF(pc.name_es, ''), pc.name_part_category) as name,
                        pc.slug,
@@ -648,20 +711,22 @@ def brand_categories():
                 JOIN part_groups pg ON pg.id_part_group = p.group_id
                 JOIN part_categories pc ON pc.id_part_category = pg.category_id
                 WHERE pvp.name_brand = %s
+                {brand_filter}
                 GROUP BY pc.id_part_category, pc.name_part_category, pc.name_es, pc.slug
                 ORDER BY part_count DESC
-            """, (brand,))
+            """, params)
             rows = cur.fetchall()
             return jsonify({
                 'brand': brand,
                 'categories': [
                     {'id': r[0], 'name': r[1], 'slug': r[2], 'part_count': r[3]}
                     for r in rows
-                ]
+                ],
+                'allowed_brands': allowed_brands or []
             })
         finally:
             cur.close()
-    return _master_only(_query)
+    return _with_conns(_query)
 
 
 @catalog_bp.route('/brand-parts', methods=['GET'])
@@ -680,21 +745,110 @@ def brand_parts():
     def _query(master, tenant, branch_id):
         cur = master.cursor()
         try:
-            # Build dynamic filters
-            params = [brand]
+            allowed_brands = _get_allowed_brands(tenant) if tenant else None
+
             cat_filter = ""
             search_filter = ""
+            params = [brand]
 
             if category_id:
                 cat_filter = "AND pc.id_part_category = %s"
                 params.append(category_id)
 
+            # --- Brand-filtered mode: return aftermarket parts directly ---
+            if allowed_brands:
+                am_search = ""
+                am_params = list(params)
+                if search:
+                    am_search = "AND (ap.part_number ILIKE %s OR COALESCE(NULLIF(ap.name_aftermarket_parts, ''), p.name_part) ILIKE %s)"
+                    like_term = f"%{search}%"
+                    am_params.extend([like_term, like_term])
+
+                query_params = list(am_params)
+                cur.execute(f"""
+                    SELECT DISTINCT ap.id_aftermarket_parts,
+                           ap.part_number,
+                           COALESCE(NULLIF(ap.name_aftermarket_parts, ''), p.name_part) as name,
+                           m.name_manufacture,
+                           ap.price_usd,
+                           p.id_part,
+                           pg.id_part_group, pg.name_part_group,
+                           pc.id_part_category, pc.name_part_category
+                    FROM part_vehicle_preview pvp
+                    JOIN parts p ON p.id_part = pvp.part_id
+                    JOIN aftermarket_parts ap ON ap.oem_part_id = p.id_part
+                    JOIN manufacturers m ON m.id_manufacture = ap.manufacturer_id
+                    JOIN part_groups pg ON pg.id_part_group = p.group_id
+                    JOIN part_categories pc ON pc.id_part_category = pg.category_id
+                    WHERE pvp.name_brand = %s
+                    {cat_filter}
+                    {am_search}
+                    AND UPPER(m.name_manufacture) = ANY(%s)
+                    ORDER BY m.name_manufacture, ap.part_number
+                    LIMIT %s OFFSET %s
+                """, query_params + [allowed_brands, limit, offset])
+
+                part_rows = cur.fetchall()
+                oem_ids = [r[5] for r in part_rows]
+
+                count_params = list(am_params)
+                cur.execute(f"""
+                    SELECT COUNT(DISTINCT ap.id_aftermarket_parts)
+                    FROM part_vehicle_preview pvp
+                    JOIN parts p ON p.id_part = pvp.part_id
+                    JOIN aftermarket_parts ap ON ap.oem_part_id = p.id_part
+                    JOIN manufacturers m ON m.id_manufacture = ap.manufacturer_id
+                    JOIN part_groups pg ON pg.id_part_group = p.group_id
+                    JOIN part_categories pc ON pc.id_part_category = pg.category_id
+                    WHERE pvp.name_brand = %s
+                    {cat_filter}
+                    {am_search}
+                    AND UPPER(m.name_manufacture) = ANY(%s)
+                """, count_params + [allowed_brands])
+                total = cur.fetchone()[0]
+
+                local_stock = {}
+                if tenant and oem_ids:
+                    try:
+                        from services.catalog_service import _get_local_stock_bulk
+                        local_stock = _get_local_stock_bulk(tenant, oem_ids)
+                    except Exception:
+                        pass
+
+                items = []
+                for r in part_rows:
+                    oem_id = r[5]
+                    stock_info = local_stock.get(oem_id, {})
+                    items.append({
+                        'id': r[0],
+                        'oem_part_number': r[1],
+                        'name': r[2],
+                        'manufacturer': r[3],
+                        'price_usd': float(r[4]) if r[4] is not None else None,
+                        'oem_id': oem_id,
+                        'group': {'id': r[6], 'name': r[7]},
+                        'category': {'id': r[8], 'name': r[9]},
+                        'local_stock': stock_info.get('stock', 0),
+                        'local_price': stock_info.get('price', None),
+                    })
+
+                return jsonify({
+                    'brand': brand,
+                    'category_id': category_id,
+                    'search': search,
+                    'items': items,
+                    'total': total,
+                    'limit': limit,
+                    'offset': offset,
+                    'allowed_brands': allowed_brands
+                })
+
+            # --- Normal mode: return OEM parts ---
             if search:
                 search_filter = "AND (p.oem_part_number ILIKE %s OR COALESCE(NULLIF(p.name_es, ''), p.name_part) ILIKE %s)"
                 like_term = f"%{search}%"
                 params.extend([like_term, like_term])
 
-            # Get parts from the brand catalog
             query_params = list(params)
             cur.execute(f"""
                 SELECT DISTINCT p.id_part, p.oem_part_number,
@@ -715,7 +869,7 @@ def brand_parts():
             part_rows = cur.fetchall()
             part_ids = [r[0] for r in part_rows]
 
-            # Count total
+            count_params = list(params)
             cur.execute(f"""
                 SELECT COUNT(DISTINCT p.id_part)
                 FROM part_vehicle_preview pvp
@@ -725,10 +879,9 @@ def brand_parts():
                 WHERE pvp.name_brand = %s
                 {cat_filter}
                 {search_filter}
-            """, params)
+            """, count_params)
             total = cur.fetchone()[0]
 
-            # Enrich with local stock if available
             local_stock = {}
             if tenant and part_ids:
                 try:
@@ -759,6 +912,7 @@ def brand_parts():
                 'total': total,
                 'limit': limit,
                 'offset': offset,
+                'allowed_brands': []
             })
         finally:
             cur.close()
@@ -784,7 +938,8 @@ def mye_parts():
     def _query(master, tenant, branch_id):
         cur = master.cursor()
         try:
-            # Build dynamic filters
+            allowed_brands = _get_allowed_brands(tenant) if tenant else None
+
             cat_filter = ""
             search_filter = ""
             params = [mye_id]
@@ -793,12 +948,103 @@ def mye_parts():
                 cat_filter = "AND pc.id_part_category = %s"
                 params.append(category_id)
 
+            # --- Brand-filtered mode: return aftermarket parts directly ---
+            if allowed_brands:
+                am_search = ""
+                am_params = list(params)
+                if search:
+                    am_search = "AND (ap.part_number ILIKE %s OR COALESCE(NULLIF(ap.name_aftermarket_parts, ''), p.name_part) ILIKE %s)"
+                    like_term = f"%{search}%"
+                    am_params.extend([like_term, like_term])
+
+                # Get aftermarket parts
+                query_params = list(am_params)
+                cur.execute(f"""
+                    SELECT DISTINCT ap.id_aftermarket_parts,
+                           ap.part_number,
+                           COALESCE(NULLIF(ap.name_aftermarket_parts, ''), p.name_part) as name,
+                           m.name_manufacture,
+                           ap.price_usd,
+                           p.id_part,
+                           pg.id_part_group, pg.name_part_group,
+                           pc.id_part_category, pc.name_part_category
+                    FROM vehicle_parts vp
+                    JOIN parts p ON p.id_part = vp.part_id
+                    JOIN aftermarket_parts ap ON ap.oem_part_id = p.id_part
+                    JOIN manufacturers m ON m.id_manufacture = ap.manufacturer_id
+                    JOIN part_groups pg ON pg.id_part_group = p.group_id
+                    JOIN part_categories pc ON pc.id_part_category = pg.category_id
+                    WHERE vp.model_year_engine_id = %s
+                    {cat_filter}
+                    {am_search}
+                    AND UPPER(m.name_manufacture) = ANY(%s)
+                    ORDER BY m.name_manufacture, ap.part_number
+                    LIMIT %s OFFSET %s
+                """, query_params + [allowed_brands, limit, offset])
+
+                part_rows = cur.fetchall()
+                oem_ids = [r[5] for r in part_rows]
+
+                # Count total
+                count_params = list(am_params)
+                cur.execute(f"""
+                    SELECT COUNT(DISTINCT ap.id_aftermarket_parts)
+                    FROM vehicle_parts vp
+                    JOIN parts p ON p.id_part = vp.part_id
+                    JOIN aftermarket_parts ap ON ap.oem_part_id = p.id_part
+                    JOIN manufacturers m ON m.id_manufacture = ap.manufacturer_id
+                    JOIN part_groups pg ON pg.id_part_group = p.group_id
+                    JOIN part_categories pc ON pc.id_part_category = pg.category_id
+                    WHERE vp.model_year_engine_id = %s
+                    {cat_filter}
+                    {am_search}
+                    AND UPPER(m.name_manufacture) = ANY(%s)
+                """, count_params + [allowed_brands])
+                total = cur.fetchone()[0]
+
+                # Local stock keyed by OEM part id
+                local_stock = {}
+                if tenant and oem_ids:
+                    try:
+                        from services.catalog_service import _get_local_stock_bulk
+                        local_stock = _get_local_stock_bulk(tenant, oem_ids)
+                    except Exception:
+                        pass
+
+                items = []
+                for r in part_rows:
+                    oem_id = r[5]
+                    stock_info = local_stock.get(oem_id, {})
+                    items.append({
+                        'id': r[0],
+                        'oem_part_number': r[1],
+                        'name': r[2],
+                        'manufacturer': r[3],
+                        'price_usd': float(r[4]) if r[4] is not None else None,
+                        'oem_id': oem_id,
+                        'group': {'id': r[6], 'name': r[7]},
+                        'category': {'id': r[8], 'name': r[9]},
+                        'local_stock': stock_info.get('stock', 0),
+                        'local_price': stock_info.get('price', None),
+                    })
+
+                return jsonify({
+                    'mye_id': mye_id,
+                    'category_id': category_id,
+                    'search': search,
+                    'items': items,
+                    'total': total,
+                    'limit': limit,
+                    'offset': offset,
+                    'allowed_brands': allowed_brands
+                })
+
+            # --- Normal mode: return OEM parts ---
             if search:
                 search_filter = "AND (p.oem_part_number ILIKE %s OR COALESCE(NULLIF(p.name_es, ''), p.name_part) ILIKE %s)"
                 like_term = f"%{search}%"
                 params.extend([like_term, like_term])
 
-            # Get parts
             query_params = list(params)
             cur.execute(f"""
                 SELECT DISTINCT p.id_part, p.oem_part_number,
@@ -819,7 +1065,7 @@ def mye_parts():
             part_rows = cur.fetchall()
             part_ids = [r[0] for r in part_rows]
 
-            # Count total
+            count_params = list(params)
             cur.execute(f"""
                 SELECT COUNT(DISTINCT p.id_part)
                 FROM vehicle_parts vp
@@ -829,10 +1075,9 @@ def mye_parts():
                 WHERE vp.model_year_engine_id = %s
                 {cat_filter}
                 {search_filter}
-            """, params)
+            """, count_params)
             total = cur.fetchone()[0]
 
-            # Enrich with local stock if available
             local_stock = {}
             if tenant and part_ids:
                 try:
@@ -863,6 +1108,7 @@ def mye_parts():
                 'total': total,
                 'limit': limit,
                 'offset': offset,
+                'allowed_brands': []
             })
         finally:
             cur.close()
diff --git a/pos/blueprints/customers_bp.py b/pos/blueprints/customers_bp.py
index 73a277f..794cbf5 100644
--- a/pos/blueprints/customers_bp.py
+++ b/pos/blueprints/customers_bp.py
@@ -91,7 +91,7 @@ def get_customer(customer_id):
     cur.execute("""
         SELECT id, branch_id, name, rfc, razon_social, regimen_fiscal, uso_cfdi,
                cp, email, phone, address, price_tier, credit_limit, credit_balance,
-               is_active, vehicle_info, created_at
+               is_active, vehicle_info, created_at, max_discount_pct
         FROM customers WHERE id = %s
     """, (customer_id,))
     row = cur.fetchone()
@@ -103,7 +103,7 @@ def get_customer(customer_id):
     customer = dict(zip(cols, row))
 
     # Convert Decimal to float
-    for k in ('credit_limit', 'credit_balance'):
+    for k in ('credit_limit', 'credit_balance', 'max_discount_pct'):
         if customer.get(k) is not None:
             customer[k] = float(customer[k])
 
@@ -213,7 +213,7 @@ def update_customer(customer_id):
     # Build dynamic update
     allowed = ['name', 'rfc', 'razon_social', 'regimen_fiscal', 'uso_cfdi',
                'cp', 'email', 'phone', 'address', 'price_tier', 'credit_limit',
-               'vehicle_info', 'is_active', 'branch_id']
+               'max_discount_pct', 'vehicle_info', 'is_active', 'branch_id']
     sets = []
     vals = []
     for field in allowed:
diff --git a/pos/blueprints/inventory_bp.py b/pos/blueprints/inventory_bp.py
index 1ea2f31..b0260e8 100644
--- a/pos/blueprints/inventory_bp.py
+++ b/pos/blueprints/inventory_bp.py
@@ -26,6 +26,26 @@ from tasks import sync_vehicle_compatibility_task
 inventory_bp = Blueprint('inventory', __name__, url_prefix='/pos/api/inventory')
 
 
+def _get_tier_discounts(conn):
+    """Read global tier discounts from DB. Returns dict {tier_id: discount_pct}."""
+    cur = conn.cursor()
+    cur.execute("SELECT tier_id, discount_pct FROM tier_discounts")
+    rows = cur.fetchall()
+    cur.close()
+    return {r[0]: float(r[1]) for r in rows}
+
+
+def _apply_tier_discounts(price_1, discounts):
+    """Given a base price and discount dict, return (price_2, price_3)."""
+    if not price_1:
+        return 0, 0
+    disc2 = discounts.get(2, 0)
+    disc3 = discounts.get(3, 0)
+    p2 = round(float(price_1) * (1 - disc2 / 100), 2)
+    p3 = round(float(price_1) * (1 - disc3 / 100), 2)
+    return p2, p3
+
+
 # ─── AI Classification ───────────────────────────
 
 @inventory_bp.route('/classify/<part_number>', methods=['GET'])
@@ -254,6 +274,16 @@ def create_item():
         mcur.close(); mconn.close()
         barcode = generate_barcode(conn, db_name)
 
+    # Auto-calculate tier prices from global discounts
+    discounts = _get_tier_discounts(conn)
+    price_1 = data.get('price_1', 0)
+    price_2, price_3 = _apply_tier_discounts(price_1, discounts)
+    # Allow override if explicitly sent (backward compat)
+    if 'price_2' in data:
+        price_2 = data['price_2']
+    if 'price_3' in data:
+        price_3 = data['price_3']
+
     try:
         cur.execute("""
             INSERT INTO inventory
@@ -267,7 +297,7 @@ def create_item():
             data.get('description'), data.get('category_id'), data.get('brand'),
             json.dumps(data.get('vehicle_compatibility')) if data.get('vehicle_compatibility') else None,
             data.get('unit', 'PZA'), data.get('cost', 0),
-            data.get('price_1', 0), data.get('price_2', 0), data.get('price_3', 0),
+            price_1, price_2, price_3,
             data.get('tax_rate', 0.16),
             data.get('min_stock', 0), data.get('max_stock', 0),
             data.get('location'), data.get('image_url'), data.get('catalog_part_id')
@@ -365,6 +395,15 @@ def update_item(item_id):
     if changing_prices and not has_permission('config.edit_prices'):
         return jsonify({'error': 'Permission config.edit_prices required to change prices'}), 403
 
+    # Auto-calculate tier prices if price_1 changes and no explicit override
+    discounts = _get_tier_discounts(conn)
+    if 'price_1' in data and ('price_2' not in data or 'price_3' not in data):
+        p2, p3 = _apply_tier_discounts(data['price_1'], discounts)
+        if 'price_2' not in data:
+            data['price_2'] = p2
+        if 'price_3' not in data:
+            data['price_3'] = p3
+
     # Build dynamic update
     allowed = ['part_number', 'barcode', 'name', 'description', 'category_id', 'brand',
                'vehicle_compatibility', 'unit', 'cost', 'price_1', 'price_2', 'price_3',
@@ -536,6 +575,33 @@ def delete_image(item_id):
     return jsonify({'message': 'Image deleted'})
 
 
+@inventory_bp.route('/items/<int:item_id>', methods=['DELETE'])
+@require_auth('inventory.edit')
+def delete_item(item_id):
+    """Soft-delete an inventory item (mark is_active = false).
+
+    Keeps historical data (sales, movements) intact while removing
+    the item from the active catalog and stock views.
+    """
+    conn = get_tenant_conn(g.tenant_id)
+    cur = conn.cursor()
+
+    cur.execute("SELECT id, part_number, name FROM inventory WHERE id = %s", (item_id,))
+    row = cur.fetchone()
+    if not row:
+        cur.close(); conn.close()
+        return jsonify({'error': 'Item not found'}), 404
+
+    cur.execute("UPDATE inventory SET is_active = false WHERE id = %s", (item_id,))
+    conn.commit()
+
+    log_action(conn, 'INVENTORY_DELETE', 'inventory', item_id,
+               old_value={'part_number': row[1], 'name': row[2]})
+
+    cur.close(); conn.close()
+    return jsonify({'message': 'Item deleted', 'id': item_id})
+
+
 # ─── Bulk Image Import ─────────────────────────
 
 @inventory_bp.route('/bulk-images', methods=['POST'])
@@ -973,6 +1039,70 @@ def api_inventory_stats():
     })
 
 
+@inventory_bp.route('/summary', methods=['GET'])
+@require_auth('inventory.view')
+def api_inventory_summary():
+    """Get high-level summary counts for the inventory dashboard badges."""
+    conn = get_tenant_conn(g.tenant_id)
+    cur = conn.cursor()
+    branch_id = getattr(g, 'branch_id', None)
+
+    where_branch = ""
+    params = []
+    if branch_id:
+        where_branch = "AND i.branch_id = %s"
+        params.append(branch_id)
+
+    # 1. Total active SKUs
+    cur.execute(f"""
+        SELECT COUNT(*) FROM inventory i
+        WHERE i.is_active = true {where_branch}
+    """, params.copy())
+    total_skus = cur.fetchone()[0] or 0
+
+    # 2. Total inventory value (cost * stock)
+    cur.execute(f"""
+        SELECT COALESCE(SUM(i.cost * COALESCE(s.stock, 0)), 0)
+        FROM inventory i
+        LEFT JOIN inventory_stock_summary s ON s.inventory_id = i.id
+        WHERE i.is_active = true {where_branch}
+    """, params.copy())
+    total_value = float(cur.fetchone()[0] or 0)
+
+    # 3. Low stock count (below min_stock)
+    cur.execute(f"""
+        SELECT COUNT(*)
+        FROM inventory i
+        LEFT JOIN inventory_stock_summary s ON s.inventory_id = i.id
+        WHERE i.is_active = true {where_branch}
+          AND i.min_stock IS NOT NULL AND i.min_stock > 0
+          AND COALESCE(s.stock, 0) < i.min_stock
+    """, params.copy())
+    low_stock = cur.fetchone()[0] or 0
+
+    # 4. No movement in last 60 days
+    cutoff = datetime.utcnow() - timedelta(days=60)
+    cur.execute(f"""
+        SELECT COUNT(*)
+        FROM inventory i
+        WHERE i.is_active = true {where_branch}
+          AND i.id NOT IN (
+              SELECT inventory_id FROM inventory_operations
+              WHERE created_at > %s
+          )
+    """, params + [cutoff])
+    no_movement = cur.fetchone()[0] or 0
+
+    cur.close(); conn.close()
+
+    return jsonify({
+        'total_skus': total_skus,
+        'total_value': round(total_value, 2),
+        'low_stock': low_stock,
+        'no_movement': no_movement,
+    })
+
+
 # ─── Alerts and History ────────────────────────
 
 @inventory_bp.route('/alerts', methods=['GET'])
@@ -1594,3 +1724,46 @@ def search_mye_endpoint():
         return jsonify({'data': results})
     finally:
         master.close()
+
+
+# ─── Global Tier Discounts ───────────────────────
+
+@inventory_bp.route('/tier-discounts', methods=['GET'])
+@require_auth()
+def get_tier_discounts_endpoint():
+    """Return global tier discount percentages."""
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        discounts = _get_tier_discounts(conn)
+        return jsonify({
+            'data': [
+                {'tier_id': 2, 'tier_name': 'Taller', 'discount_pct': discounts.get(2, 0)},
+                {'tier_id': 3, 'tier_name': 'Mayoreo', 'discount_pct': discounts.get(3, 0)},
+            ]
+        })
+    finally:
+        conn.close()
+
+
+@inventory_bp.route('/tier-discounts', methods=['PUT'])
+@require_auth('config.edit_prices')
+def update_tier_discounts_endpoint():
+    """Update global tier discount percentages."""
+    data = request.get_json() or {}
+    conn = get_tenant_conn(g.tenant_id)
+    cur = conn.cursor()
+    try:
+        for tier_id in (2, 3):
+            key = f'discount_pct_{tier_id}'
+            if key in data:
+                val = max(0, min(100, float(data[key])))
+                cur.execute("""
+                    INSERT INTO tier_discounts (tier_id, tier_name, discount_pct)
+                    VALUES (%s, %s, %s)
+                    ON CONFLICT (tier_id) DO UPDATE SET discount_pct = EXCLUDED.discount_pct
+                """, (tier_id, 'Taller' if tier_id == 2 else 'Mayoreo', val))
+        conn.commit()
+        return jsonify({'message': 'Descuentos actualizados'})
+    finally:
+        cur.close()
+        conn.close()
diff --git a/pos/blueprints/invoicing_bp.py b/pos/blueprints/invoicing_bp.py
index 2b4dba2..4e3a950 100644
--- a/pos/blueprints/invoicing_bp.py
+++ b/pos/blueprints/invoicing_bp.py
@@ -397,3 +397,30 @@ def get_sale_pdf(sale_id):
         'customer': customer,
         'cfdi': cfdi_info,
     })
+
+
+@invoicing_bp.route('/stats', methods=['GET'])
+@require_auth('invoicing.read')
+def api_invoicing_stats():
+    """Return counts for tab badges: invoices, credit notes, payment complements, cancellations."""
+    conn = get_tenant_conn(g.tenant_id)
+    cur = conn.cursor()
+
+    cur.execute("""
+        SELECT
+            COUNT(*) FILTER (WHERE type = 'ingreso' AND status IN ('pending', 'stamped', 'retry')) as facturas,
+            COUNT(*) FILTER (WHERE type = 'egreso' AND status IN ('pending', 'stamped', 'retry')) as notas_credito,
+            COUNT(*) FILTER (WHERE type = 'pago' AND status IN ('pending', 'stamped', 'retry')) as complementos,
+            COUNT(*) FILTER (WHERE status = 'cancelled') as cancelaciones
+        FROM cfdi_queue
+    """)
+    row = cur.fetchone()
+    cur.close()
+    conn.close()
+
+    return jsonify({
+        'facturas': row[0] or 0,
+        'notas_credito': row[1] or 0,
+        'complementos': row[2] or 0,
+        'cancelaciones': row[3] or 0,
+    })
diff --git a/pos/blueprints/marketplace_bp.py b/pos/blueprints/marketplace_bp.py
index 1e8258a..a69a04d 100644
--- a/pos/blueprints/marketplace_bp.py
+++ b/pos/blueprints/marketplace_bp.py
@@ -190,6 +190,16 @@ def bodegas_with_part(part_id):
     return _with_master(_do)
 
 
+@marketplace_bp.route('/inventory/listing/<int:wi_id>', methods=['GET'])
+@require_auth()
+def bodegas_with_listing(wi_id):
+    """Return bodegas stocking a specific seller listing (wi_id)."""
+    def _do(master):
+        data = mkt.get_bodegas_with_listing(master, wi_id)
+        return jsonify({'data': data, 'count': len(data)})
+    return _with_master(_do)
+
+
 # ═══════════════════════════════════════════════════════════════════════════
 # PURCHASE ORDERS
 # ═══════════════════════════════════════════════════════════════════════════
diff --git a/pos/blueprints/marketplace_external_bp.py b/pos/blueprints/marketplace_external_bp.py
new file mode 100644
index 0000000..2a6f059
--- /dev/null
+++ b/pos/blueprints/marketplace_external_bp.py
@@ -0,0 +1,404 @@
+"""MercadoLibre external marketplace REST endpoints.
+
+Routes:
+  Config
+    GET  /pos/api/marketplace-ext/config
+    POST /pos/api/marketplace-ext/connect
+    DELETE /pos/api/marketplace-ext/connect
+    GET  /pos/api/marketplace-ext/categories
+
+  Listings
+    GET  /pos/api/marketplace-ext/listings
+    POST /pos/api/marketplace-ext/listings
+    POST /pos/api/marketplace-ext/listings/<id>/sync
+    POST /pos/api/marketplace-ext/listings/<id>/pause
+    POST /pos/api/marketplace-ext/listings/<id>/activate
+    DELETE /pos/api/marketplace-ext/listings/<id>
+
+  Orders
+    GET  /pos/api/marketplace-ext/orders
+    GET  /pos/api/marketplace-ext/orders/<id>
+    POST /pos/api/marketplace-ext/orders/<id>/convert
+
+  Webhook (public)
+    POST /pos/api/marketplace-ext/webhook/meli
+"""
+
+from flask import Blueprint, request, jsonify, g
+from middleware import require_auth, has_permission
+from tenant_db import get_tenant_conn, get_master_conn
+from services import marketplace_external_service as meli_svc
+from services.meli_service import MeliService, MeliAuthError
+
+marketplace_ext_bp = Blueprint(
+    "marketplace_ext", __name__, url_prefix="/pos/api/marketplace-ext"
+)
+
+
+# ─── Helpers ───────────────────────────────────────────────────────────────
+
+def _require_meli_manage():
+    if not has_permission("marketplace.manage"):
+        return jsonify({"error": "Missing permission: marketplace.manage"}), 403
+    return None
+
+
+# ═══════════════════════════════════════════════════════════════════════════
+# CONFIG
+# ═══════════════════════════════════════════════════════════════════════════
+
+@marketplace_ext_bp.route("/config", methods=["GET"])
+@require_auth()
+def get_config():
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        cfg = meli_svc.get_meli_config(conn)
+        # Never return tokens to frontend
+        safe = {
+            k: v for k, v in cfg.items()
+            if k not in ("meli_access_token", "meli_refresh_token", "meli_client_secret")
+        }
+        safe["connected"] = bool(cfg.get("meli_access_token"))
+        return jsonify(safe)
+    finally:
+        conn.close()
+
+
+@marketplace_ext_bp.route("/connect", methods=["POST"])
+@require_auth()
+def connect_meli():
+    err = _require_meli_manage()
+    if err:
+        return err
+
+    data = request.get_json() or {}
+    code = data.get("code")
+    client_id = data.get("client_id")
+    client_secret = data.get("client_secret")
+    redirect_uri = data.get("redirect_uri", "")
+
+    if not code or not client_id or not client_secret:
+        return jsonify({"error": "code, client_id and client_secret required"}), 400
+
+    try:
+        token_data = MeliService.exchange_code(code, client_id, client_secret, redirect_uri)
+    except MeliAuthError as e:
+        return jsonify({"error": str(e)}), 400
+
+    access_token = token_data.get("access_token")
+    refresh_token = token_data.get("refresh_token")
+    user_id = token_data.get("user_id")
+
+    # Validate token by fetching user
+    svc = MeliService(access_token)
+    try:
+        user = svc.get_user()
+    except MeliAuthError as e:
+        return jsonify({"error": f"Invalid token: {e}"}), 400
+
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        meli_svc.save_meli_config(conn, {
+            "meli_access_token": access_token,
+            "meli_refresh_token": refresh_token,
+            "meli_user_id": str(user_id or user.get("id")),
+            "meli_site_id": user.get("site_id", "MLM"),
+            "meli_enabled": "true",
+            "meli_client_id": client_id,
+            "meli_client_secret": client_secret,
+        })
+        return jsonify({
+            "ok": True,
+            "user_id": user_id or user.get("id"),
+            "nickname": user.get("nickname"),
+            "site_id": user.get("site_id"),
+        })
+    finally:
+        conn.close()
+
+
+@marketplace_ext_bp.route("/connect", methods=["DELETE"])
+@require_auth()
+def disconnect_meli():
+    err = _require_meli_manage()
+    if err:
+        return err
+
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        meli_svc.delete_meli_config(conn)
+        return jsonify({"ok": True})
+    finally:
+        conn.close()
+
+
+@marketplace_ext_bp.route("/categories", methods=["GET"])
+@require_auth()
+def search_categories():
+    q = request.args.get("q", "")
+    site_id = request.args.get("site_id", "MLM")
+    if not q or len(q) < 2:
+        return jsonify({"categories": []})
+
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        cfg = meli_svc.get_meli_config(conn)
+        svc = meli_svc._get_meli_service(cfg)
+        if not svc:
+            return jsonify({"error": "MercadoLibre not connected"}), 400
+        result = svc.search_categories(site_id, q)
+        return jsonify({"categories": result})
+    finally:
+        conn.close()
+
+
+# ═══════════════════════════════════════════════════════════════════════════
+# LISTINGS
+# ═══════════════════════════════════════════════════════════════════════════
+
+@marketplace_ext_bp.route("/listings", methods=["GET"])
+@require_auth()
+def list_listings():
+    page = int(request.args.get("page", 1))
+    per_page = min(int(request.args.get("per_page", 50)), 200)
+    status = request.args.get("status")
+
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        result = meli_svc.get_listings(conn, page=page, per_page=per_page, status=status)
+        return jsonify(result)
+    finally:
+        conn.close()
+
+
+@marketplace_ext_bp.route("/listings", methods=["POST"])
+@require_auth()
+def create_listings():
+    err = _require_meli_manage()
+    if err:
+        return err
+
+    data = request.get_json() or {}
+    inventory_ids = data.get("inventory_ids", [])
+    category_id = data.get("category_id")
+    listing_type = data.get("listing_type", "gold_special")
+    shipping_mode = data.get("shipping_mode", "me2")
+
+    if not inventory_ids:
+        return jsonify({"error": "inventory_ids required"}), 400
+    if not category_id:
+        return jsonify({"error": "category_id required"}), 400
+
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        result = meli_svc.publish_items(
+            conn,
+            inventory_ids=inventory_ids,
+            meli_category_id=category_id,
+            listing_type_id=listing_type,
+            shipping_mode=shipping_mode,
+        )
+        return jsonify(result), 201
+    except ValueError as e:
+        return jsonify({"error": str(e)}), 400
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+    finally:
+        conn.close()
+
+
+@marketplace_ext_bp.route("/listings/<int:listing_id>/sync", methods=["POST"])
+@require_auth()
+def sync_listing(listing_id):
+    err = _require_meli_manage()
+    if err:
+        return err
+
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        result = meli_svc.sync_listing(conn, listing_id)
+        return jsonify(result)
+    except ValueError as e:
+        return jsonify({"error": str(e)}), 400
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+    finally:
+        conn.close()
+
+
+@marketplace_ext_bp.route("/listings/<int:listing_id>/pause", methods=["POST"])
+@require_auth()
+def pause_listing(listing_id):
+    err = _require_meli_manage()
+    if err:
+        return err
+
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        result = meli_svc.pause_listing(conn, listing_id)
+        return jsonify(result)
+    except ValueError as e:
+        return jsonify({"error": str(e)}), 400
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+    finally:
+        conn.close()
+
+
+@marketplace_ext_bp.route("/listings/<int:listing_id>/activate", methods=["POST"])
+@require_auth()
+def activate_listing(listing_id):
+    err = _require_meli_manage()
+    if err:
+        return err
+
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        result = meli_svc.activate_listing(conn, listing_id)
+        return jsonify(result)
+    except ValueError as e:
+        return jsonify({"error": str(e)}), 400
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+    finally:
+        conn.close()
+
+
+@marketplace_ext_bp.route("/listings/<int:listing_id>", methods=["DELETE"])
+@require_auth()
+def delete_listing(listing_id):
+    err = _require_meli_manage()
+    if err:
+        return err
+
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        result = meli_svc.close_listing(conn, listing_id)
+        return jsonify(result)
+    except ValueError as e:
+        return jsonify({"error": str(e)}), 400
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+    finally:
+        conn.close()
+
+
+# ═══════════════════════════════════════════════════════════════════════════
+# ORDERS
+# ═══════════════════════════════════════════════════════════════════════════
+
+@marketplace_ext_bp.route("/orders", methods=["GET"])
+@require_auth()
+def list_orders():
+    page = int(request.args.get("page", 1))
+    per_page = min(int(request.args.get("per_page", 50)), 200)
+    status = request.args.get("status")
+
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        result = meli_svc.get_orders(conn, page=page, per_page=per_page, status=status)
+        return jsonify(result)
+    finally:
+        conn.close()
+
+
+@marketplace_ext_bp.route("/orders/<int:order_id>", methods=["GET"])
+@require_auth()
+def get_order(order_id):
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        result = meli_svc.get_order_detail(conn, order_id)
+        return jsonify(result)
+    except ValueError as e:
+        return jsonify({"error": str(e)}), 404
+    finally:
+        conn.close()
+
+
+@marketplace_ext_bp.route("/orders/<int:order_id>/convert", methods=["POST"])
+@require_auth("pos.sell")
+def convert_order(order_id):
+    data = request.get_json() or {}
+    register_id = data.get("register_id")
+
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        result = meli_svc.convert_order_to_sale(
+            conn, order_id, employee_id=g.employee_id, register_id=register_id
+        )
+        return jsonify(result)
+    except ValueError as e:
+        return jsonify({"error": str(e)}), 400
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+    finally:
+        conn.close()
+
+
+@marketplace_ext_bp.route("/orders/<int:order_id>/status", methods=["POST"])
+@require_auth()
+def update_order_status_route(order_id):
+    data = request.get_json() or {}
+    new_status = data.get("status")
+    if not new_status:
+        return jsonify({"error": "status required"}), 400
+
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        result = meli_svc.update_order_status(conn, order_id, new_status)
+        return jsonify(result)
+    except ValueError as e:
+        return jsonify({"error": str(e)}), 400
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+    finally:
+        conn.close()
+
+
+# ═══════════════════════════════════════════════════════════════════════════
+# WEBHOOK (public — no auth)
+# ═══════════════════════════════════════════════════════════════════════════
+
+@marketplace_ext_bp.route("/webhook/meli", methods=["POST"])
+def meli_webhook():
+    """Receive MercadoLibre notifications.
+
+    ML sends a lightweight payload with topic + resource URL.
+    We ack immediately and enqueue Celery for async processing.
+    """
+    data = request.get_json(force=True, silent=True) or {}
+    topic = data.get("topic", "")
+    resource = data.get("resource", "")
+    user_id = data.get("user_id")
+
+    # Resolve tenant by meli_user_id
+    tenant_id = None
+    if user_id:
+        try:
+            mconn = get_master_conn()
+            mcur = mconn.cursor()
+            mcur.execute(
+                """
+                SELECT t.id FROM tenants t
+                JOIN tenant_config c ON c.key = 'meli_user_id' AND c.value = %s
+                WHERE t.is_active = true
+                LIMIT 1
+                """,
+                (str(user_id),),
+            )
+            row = mcur.fetchone()
+            if row:
+                tenant_id = row[0]
+            mcur.close()
+            mconn.close()
+        except Exception:
+            pass
+
+    if tenant_id and topic:
+        try:
+            from tasks import process_meli_webhook_task
+            process_meli_webhook_task.delay(tenant_id, topic, resource)
+        except Exception as e:
+            print(f"[ML Webhook] Failed to enqueue task: {e}")
+
+    return jsonify({"ok": True})
diff --git a/pos/blueprints/whatsapp_bp.py b/pos/blueprints/whatsapp_bp.py
index 9983a68..579277c 100644
--- a/pos/blueprints/whatsapp_bp.py
+++ b/pos/blueprints/whatsapp_bp.py
@@ -15,21 +15,37 @@ from flask import Blueprint, request, jsonify, g
 from middleware import require_auth
 from tenant_db import get_tenant_conn, get_master_conn
 from services import whatsapp_service
+from config import WHATSAPP_BRIDGE_URL, WHATSAPP_BRIDGE_KEY
 
 whatsapp_bp = Blueprint('whatsapp', __name__, url_prefix='/pos/api/whatsapp')
 
 
 def _get_whatsapp_config(conn):
     """Read WhatsApp bridge configuration from tenant_config.
-    Returns dict with bridge_url, enabled, etc."""
+    Falls back to global server config (config.py / env vars) when tenant
+    has no explicit WhatsApp settings. This allows the shared bridge to work
+    out of the box for all tenants.
+    """
     cur = conn.cursor()
     cur.execute("SELECT key, value FROM tenant_config WHERE key LIKE 'whatsapp_%'")
     config = {row[0]: row[1] for row in cur.fetchall()}
     cur.close()
+
+    bridge_url = config.get('whatsapp_bridge_url', '') or WHATSAPP_BRIDGE_URL or ''
+    bridge_key = config.get('whatsapp_bridge_key', '') or WHATSAPP_BRIDGE_KEY or ''
+    enabled_raw = config.get('whatsapp_enabled', '').lower()
+    if enabled_raw == 'true':
+        enabled = True
+    elif enabled_raw == 'false':
+        enabled = False
+    else:
+        # No explicit tenant setting: auto-enable if a bridge URL is configured
+        enabled = bool(bridge_url)
+
     return {
-        'bridge_url': config.get('whatsapp_bridge_url', ''),
-        'bridge_key': config.get('whatsapp_bridge_key', ''),
-        'enabled': config.get('whatsapp_enabled', 'false').lower() == 'true',
+        'bridge_url': bridge_url,
+        'bridge_key': bridge_key,
+        'enabled': enabled,
         'phone_number': config.get('whatsapp_phone_number', ''),
     }
 
@@ -194,27 +210,9 @@ def _enrich_wa_reply_with_part(search_query, vehicle, tenant_conn, master_conn=N
             fallback_rows = _do_search(use_compat=False)
 
         if not rows and not fallback_rows:
-            # Truly nothing found — return a conversational message that doesn't kill the chat
-            v_str = ""
-            if vehicle and vehicle.get('brand'):
-                v_str = f"{vehicle.get('brand','')} {vehicle.get('model','')} {vehicle.get('year','')}".strip()
-
-            msg_parts = [
-                "🔍 Revisé nuestro inventario y no encontré esas partes en este momento."
-            ]
-            if v_str:
-                msg_parts.append(f"Para tu {v_str}, puedo:")
-            else:
-                msg_parts.append("Te puedo ayudar de estas formas:")
-            msg_parts.extend([
-                "",
-                "• *Pedirlas por encargo* — te doy tiempo y precio estimado",
-                "• *Buscar alternativas* — equivalentes de otra marca que sí tengamos",
-                "• *Sugerir refaccionarias cercanas* — si es urgente",
-                "",
-                "¿Qué prefieres? O dime si quieres buscar otra parte."
-            ])
-            return '\n'.join(msg_parts), None
+            # Nothing found in local inventory — let the AI's original response stand.
+            # The webhook will append a soft note instead of replacing the message.
+            return None, None
 
         # Use fallback rows if primary search returned nothing
         using_fallback = False
@@ -366,6 +364,11 @@ def webhook():
         except Exception:
             tenant_id = None
 
+    # Prepare phone and reply target early
+    reply_to = msg.get('jid') or msg['phone']
+    media_kind = msg.get('media_kind', 'text')
+    clean_phone = msg.get('phone', '')
+
     tenant_conn = None
     master_conn = None
     inventory_context = None
@@ -394,11 +397,34 @@ def webhook():
             print(f"[WA-AI] inventory_context failed: {e}")
             inventory_context = None
 
+        # 2c. Urgency detection — if customer signals urgency, add a note
+        try:
+            from services.part_kits import is_urgent, urgency_note
+            if msg.get('text') and is_urgent(msg['text']):
+                if inventory_context:
+                    inventory_context += urgency_note()
+                else:
+                    inventory_context = urgency_note().strip()
+        except Exception as e:
+            print(f"[WA-AI] urgency detection failed: {e}")
+
+        # 2d. Purchase history — append recent confirmed orders for this customer
+        try:
+            from services.part_kits import get_purchase_history
+            history = get_purchase_history(clean_phone, tenant_conn)
+            if history:
+                if inventory_context:
+                    inventory_context += "\n\n" + history
+                else:
+                    inventory_context = history
+        except Exception as e:
+            print(f"[WA-AI] Purchase history failed: {e}")
+
         # 2b. Append previously-detected vehicle so the AI keeps context
         # even when we don't send full conversation history (Hermes is slow with it)
         try:
             from services.wa_quotation import get_vehicle
-            saved_vehicle = get_vehicle(clean_phone)
+            saved_vehicle = get_vehicle(tenant_conn, clean_phone)
             if saved_vehicle and inventory_context:
                 v_str = f"{saved_vehicle.get('brand','')} {saved_vehicle.get('model','')} {saved_vehicle.get('year','')}".strip()
                 if v_str:
@@ -411,25 +437,68 @@ def webhook():
             print(f"[WA-AI] vehicle_context failed: {e}")
     except Exception as e:
         print(f"[WA-AI] tenant connection failed: {e}")
+        if tenant_conn:
+            try:
+                tenant_conn.rollback()
+            except Exception:
+                pass
 
     # 3. Dispatch by media kind + quotation commands
     reply = None
-    reply_to = msg.get('jid') or msg['phone']
-    media_kind = msg.get('media_kind', 'text')
-    clean_phone = msg.get('phone', '')
+
+    # ── Abandoned quotation follow-up ──
+    # If customer has an active quote and hasn't interacted in 15+ min,
+    # send a gentle nudge before processing their current message.
+    try:
+        from services.part_kits import should_send_followup
+        followup = should_send_followup(clean_phone, tenant_conn)
+        if followup:
+            whatsapp_service.send_message(reply_to, followup, bridge_url=wa_config.get('bridge_url'))
+            if tenant_conn:
+                cur_fu = tenant_conn.cursor()
+                cur_fu.execute(
+                    "INSERT INTO whatsapp_messages (phone, direction, message_text) VALUES (%s, 'outgoing', %s)",
+                    (clean_phone, followup)
+                )
+                tenant_conn.commit()
+                cur_fu.close()
+    except Exception as fu_err:
+        print(f"[WA-AI] Follow-up send failed: {fu_err}")
+
+    # ── Location message → nearest branch ──
+    if media_kind == 'location' and msg.get('latitude') is not None and msg.get('longitude') is not None:
+        from services.geo_branches import find_nearest_branch
+        nearest = find_nearest_branch(tenant_conn, msg['latitude'], msg['longitude'])
+        if nearest:
+            reply = (
+                f"📍 *Sucursal más cercana:*\n\n"
+                f"*{nearest['name']}*\n"
+                f"📌 {nearest['address']}\n"
+                f"📞 {nearest['phone']}\n"
+                f"🚗 Aprox. *{nearest['distance_km']} km* de tu ubicación\n\n"
+                f"¿Te gustaría recoger tu pedido ahí o prefieres envío a domicilio?"
+            )
+        else:
+            reply = (
+                "📍 Gracias por tu ubicación.\n\n"
+                "Actualmente no tenemos sucursales registradas con coordenadas. "
+                "¿En qué ciudad te encuentras? Te puedo indicar nuestras opciones de envío."
+            )
 
     # ── Check for quotation commands FIRST (before AI) ──
-    if media_kind == 'text' and msg.get('text'):
+    if not reply and media_kind == 'text' and msg.get('text'):
         from services.wa_quotation import (
             detect_quote_intent, get_open_quotation, create_quotation,
             add_item_to_quotation, get_quotation_detail, format_quotation_wa,
             clear_quotation, confirm_quotation, get_last_shown_part, set_last_shown_part,
         )
+        from services.quote_image import generate_quote_image
+        from services.whatsapp_service import send_image
         has_open = bool(tenant_conn and get_open_quotation(tenant_conn, clean_phone))
         intent, qty = detect_quote_intent(msg['text'], has_open_quote=has_open)
 
         if intent == 'add':
-            last_part = get_last_shown_part(clean_phone)
+            last_part = get_last_shown_part(tenant_conn, clean_phone)
             if not last_part:
                 reply = '⚠️ Primero pregunta por una parte y luego escribe "cotizar" para agregarla.'
             elif tenant_conn:
@@ -444,6 +513,14 @@ def webhook():
                     f'Llevas {item_count} producto{"s" if item_count != 1 else ""} — total parcial: ${detail["total"]:,.2f}\n\n'
                     f'_Sigue preguntando por más partes, o escribe "enviar cotización" cuando termines._'
                 )
+                # Smart kit suggestion — cross-sell related parts
+                try:
+                    from services.part_kits import build_kit_text
+                    kit_text = build_kit_text(last_part.get('name', ''))
+                    if kit_text:
+                        reply += kit_text
+                except Exception as kit_err:
+                    print(f"[WA-AI] Kit suggestion failed: {kit_err}")
 
         elif intent == 'send':
             if tenant_conn:
@@ -453,6 +530,32 @@ def webhook():
                     reply = format_quotation_wa(detail)
                     if not reply:
                         reply = '⚠️ Tu cotización está vacía. Pregunta por partes y escribe "cotizar" para agregarlas.'
+                    else:
+                        # Generate rich visual quote image and send it
+                        try:
+                            quote_items = []
+                            for it in detail.get('items', []):
+                                quote_items.append({
+                                    'name': it.get('name', ''),
+                                    'sku': it.get('sku', ''),
+                                    'qty': it.get('quantity', 1),
+                                    'price': float(it.get('unit_price', 0)),
+                                    'total': float(it.get('total', 0)),
+                                })
+                            totals = {
+                                'subtotal': float(detail.get('subtotal', 0)),
+                                'tax': float(detail.get('tax', 0)),
+                                'total': float(detail.get('total', 0)),
+                            }
+                            tenant_name = tenant_config.get('business_name', 'Autopartes')
+                            b64_img = generate_quote_image(quote_items, totals, tenant_name=tenant_name)
+                            img_result = send_image(clean_phone, caption="Aquí está tu cotización 👇", base64_image=b64_img, bridge_url=bridge_url)
+                            if img_result.get('success'):
+                                reply = "📎 *Te envié tu cotización en imagen.*\n\n" + reply
+                            else:
+                                print(f"[WA-AI] Image send failed: {img_result}")
+                        except Exception as img_err:
+                            print(f"[WA-AI] Quote image generation failed: {img_err}")
                 else:
                     reply = '⚠️ No tienes una cotización abierta. Pregunta por una parte primero.'
 
@@ -522,7 +625,7 @@ def webhook():
     # Load conversation history so the AI remembers context (vehicle, parts, etc.)
     conversation_history = []
     if tenant_conn:
-        conversation_history = _get_conversation_history(clean_phone, tenant_conn, limit=2)
+        conversation_history = _get_conversation_history(clean_phone, tenant_conn, limit=4)
         if conversation_history:
             print(f"[WA-AI] Loaded {len(conversation_history)} history messages for {clean_phone}")
 
@@ -570,35 +673,59 @@ def webhook():
                          'Puedes escribirme el mensaje?')
 
         elif msg.get('text'):
-            # Plain text message — standard chatbot flow
-            from services.ai_chat import chat
-            ai_resp = chat(msg['text'], conversation_history=conversation_history, inventory_context=inventory_context)
-            reply = ai_resp.get('message', '') or ''
-
-            # Enrich: if the AI returned a search_query, look up real parts
-            # from the catalog and append them to the WhatsApp reply.
-            search_q = ai_resp.get('search_query')
-            vehicle = ai_resp.get('vehicle')
-
-            # Persist detected vehicle so we don't lose context between messages
-            if vehicle and isinstance(vehicle, dict) and vehicle.get('brand'):
+            txt = msg['text'].strip().lower()
+            # Quick welcome menu for new customers with no vehicle
+            is_greeting = txt in ('hola', 'buenos dias', 'buenas tardes', 'buenas noches', 'hey', 'que onda', 'saludos')
+            if is_greeting:
                 try:
-                    from services.wa_quotation import set_vehicle
-                    set_vehicle(clean_phone, vehicle)
-                except Exception as veh_err:
-                    print(f"[WA-AI] Failed to save vehicle: {veh_err}")
+                    from services.wa_quotation import get_vehicle
+                    veh = get_vehicle(tenant_conn, clean_phone)
+                    if not veh:
+                        reply = (
+                            "¡Qué onda! Bienvenido a *Autopartes Estrada*.\n\n"
+                            "Soy Juan, tu vendedor. Para ayudarte rápido, dime:\n\n"
+                            "1️⃣ *Marca, modelo y año* de tu vehículo\n"
+                            "2️⃣ La *parte* que necesitas\n"
+                            "3️⃣ O escribe *menú* para ver opciones\n\n"
+                            '_Ejemplo: "Necesito balatas para Tsuru 2015"_'
+                        )
+                except Exception:
+                    pass
 
-            if search_q and reply:
-                try:
-                    enrichment, found_part = _enrich_wa_reply_with_part(search_q, vehicle, tenant_conn, master_conn)
-                    if enrichment:
-                        reply = reply + '\n\n' + enrichment
-                    # Track the found part so "cotizar" can add it
-                    if found_part:
-                        from services.wa_quotation import set_last_shown_part
-                        set_last_shown_part(clean_phone, found_part)
-                except Exception as enrich_err:
-                    print(f"[WA-AI] Enrichment failed: {enrich_err}")
+            if not reply:
+                # Plain text message — standard chatbot flow
+                from services.ai_chat import chat
+                ai_resp = chat(msg['text'], conversation_history=conversation_history, inventory_context=inventory_context)
+                reply = ai_resp.get('message', '') or ''
+
+                # Enrich: if the AI returned a search_query, look up real parts
+                # from the catalog and append them to the WhatsApp reply.
+                search_q = ai_resp.get('search_query')
+                vehicle = ai_resp.get('vehicle')
+
+                # Persist detected vehicle so we don't lose context between messages
+                if vehicle and isinstance(vehicle, dict) and vehicle.get('brand'):
+                    try:
+                        from services.wa_quotation import set_vehicle
+                        set_vehicle(tenant_conn, clean_phone, vehicle)
+                    except Exception as veh_err:
+                        print(f"[WA-AI] Failed to save vehicle: {veh_err}")
+
+                if search_q and reply:
+                    try:
+                        enrichment, found_part = _enrich_wa_reply_with_part(search_q, vehicle, tenant_conn, master_conn)
+                        if enrichment:
+                            reply = reply + '\n\n' + enrichment
+                        elif not found_part and vehicle and vehicle.get('brand'):
+                            # Only say "not in stock" when we have a specific vehicle
+                            # and still found nothing. Otherwise let the AI ask for vehicle info.
+                            reply = reply + '\n\n' + "_No tengo esa pieza exacta en stock para tu modelo ahora, pero puedo pedirla por encargo o buscar alternativas. ¿Te interesa?_"
+                        # Track the found part so "cotizar" can add it
+                        if found_part:
+                            from services.wa_quotation import set_last_shown_part
+                            set_last_shown_part(tenant_conn, clean_phone, found_part)
+                    except Exception as enrich_err:
+                        print(f"[WA-AI] Enrichment failed: {enrich_err}")
 
         # Send reply if we produced one
         if reply:
diff --git a/pos/gunicorn.conf.py b/pos/gunicorn.conf.py
index e94ed72..6e1c7ab 100644
--- a/pos/gunicorn.conf.py
+++ b/pos/gunicorn.conf.py
@@ -5,7 +5,7 @@ bind = "0.0.0.0:5001"
 # gthread workers handle multiple concurrent requests per worker via threads.
 # Ideal for I/O-bound Flask apps with DB queries.
 # 4 workers × 4 threads = 16 concurrent requests.
-workers = 4
+workers = 8
 threads = 4
 worker_class = "gthread"
 worker_connections = 1000
diff --git a/pos/middleware.py b/pos/middleware.py
index 15df096..1ad532c 100644
--- a/pos/middleware.py
+++ b/pos/middleware.py
@@ -29,7 +29,7 @@ def require_auth(*required_permissions):
             except jwt.InvalidTokenError:
                 return jsonify({'error': 'Invalid token'}), 401
 
-            if payload.get('type') != 'pos_access':
+            if payload.get('type') not in ('pos_access', 'access'):
                 return jsonify({'error': 'Invalid token type'}), 401
 
             g.tenant_id = payload['tenant_id']
diff --git a/pos/middleware_tenant.py b/pos/middleware_tenant.py
index f724c1d..f1e4935 100644
--- a/pos/middleware_tenant.py
+++ b/pos/middleware_tenant.py
@@ -55,7 +55,7 @@ def _lookup_tenant_by_subdomain(subdomain):
         conn = get_master_conn()
         cur = conn.cursor()
         cur.execute(
-            "SELECT id, name FROM tenants WHERE subdomain = %s AND is_active = true",
+            "SELECT id, name FROM tenants WHERE LOWER(subdomain) = %s AND is_active = true",
             (subdomain,)
         )
         row = cur.fetchone()
diff --git a/pos/migrations/v3.3_marketplace_any_part.sql b/pos/migrations/v3.3_marketplace_any_part.sql
new file mode 100644
index 0000000..f2a40dd
--- /dev/null
+++ b/pos/migrations/v3.3_marketplace_any_part.sql
@@ -0,0 +1,91 @@
+-- ═══════════════════════════════════════════════════════════════════════
+-- v3.3 — Marketplace accepts any part number (seller listings)
+-- Target: nexus_autoparts (master DB)
+-- Date: 2026-05-17
+--
+-- Makes warehouse_inventory part_id nullable and adds seller-defined
+-- fields so any seller can list parts that don't exist in the OEM catalog.
+-- Existing OEM-matched listings are untouched.
+-- ═══════════════════════════════════════════════════════════════════════
+
+-- ─── 1. WAREHOUSE_INVENTORY — add seller listing columns ─────────────
+
+ALTER TABLE warehouse_inventory
+    ADD COLUMN IF NOT EXISTS seller_part_number VARCHAR(100),
+    ADD COLUMN IF NOT EXISTS seller_part_name   VARCHAR(300),
+    ADD COLUMN IF NOT EXISTS seller_category    VARCHAR(100),
+    ADD COLUMN IF NOT EXISTS tenant_inventory_id INTEGER;
+
+-- Make part_id nullable so seller listings (without catalog match) can exist
+ALTER TABLE warehouse_inventory ALTER COLUMN part_id DROP NOT NULL;
+
+-- ─── 2. WAREHOUSE_INVENTORY — drop old unique, add partial uniques ───
+
+-- The old constraint was on (user_id, part_id, warehouse_location).
+-- We replace it with two partial unique indexes:
+--   - OEM items:    (bodega_id, part_id, warehouse_location) WHERE part_id IS NOT NULL
+--   - Seller items: (bodega_id, seller_part_number, warehouse_location) WHERE part_id IS NULL
+
+ALTER TABLE warehouse_inventory
+    DROP CONSTRAINT IF EXISTS warehouse_inventory_user_id_part_id_warehouse_location_key;
+
+DROP INDEX IF EXISTS idx_wi_unique_composite;
+
+CREATE UNIQUE INDEX IF NOT EXISTS idx_wi_unique_oem
+ON warehouse_inventory(bodega_id, part_id, warehouse_location)
+WHERE part_id IS NOT NULL;
+
+CREATE UNIQUE INDEX IF NOT EXISTS idx_wi_unique_seller
+ON warehouse_inventory(bodega_id, seller_part_number, warehouse_location)
+WHERE part_id IS NULL;
+
+-- Ensure every row has either part_id or seller_part_number
+ALTER TABLE warehouse_inventory
+    DROP CONSTRAINT IF EXISTS chk_wi_part_or_seller;
+
+ALTER TABLE warehouse_inventory
+    ADD CONSTRAINT chk_wi_part_or_seller
+    CHECK (
+        (part_id IS NOT NULL AND seller_part_number IS NULL)
+        OR
+        (part_id IS NULL AND seller_part_number IS NOT NULL)
+    );
+
+-- ─── 3. WAREHOUSE_INVENTORY — search indexes ─────────────────────────
+
+CREATE INDEX IF NOT EXISTS idx_wi_seller_pn
+ON warehouse_inventory (bodega_id, seller_part_number)
+WHERE part_id IS NULL;
+
+CREATE INDEX IF NOT EXISTS idx_wi_seller_category
+ON warehouse_inventory (seller_category)
+WHERE part_id IS NULL;
+
+-- GIN index for text search on seller listings
+CREATE INDEX IF NOT EXISTS idx_wi_seller_search
+ON warehouse_inventory
+USING gin (to_tsvector('spanish',
+    COALESCE(seller_part_name, '') || ' ' || COALESCE(seller_part_number, '')
+))
+WHERE part_id IS NULL;
+
+-- ─── 4. PURCHASE_ORDER_ITEMS — make part_id nullable ─────────────────
+
+ALTER TABLE purchase_order_items
+    ALTER COLUMN part_id DROP NOT NULL;
+
+-- Add a flag so seller listings can be distinguished in POs
+ALTER TABLE purchase_order_items
+    ADD COLUMN IF NOT EXISTS is_seller_listing BOOLEAN NOT NULL DEFAULT FALSE;
+
+-- ─── 5. Back-compat: ensure existing rows are valid ──────────────────
+
+-- Existing rows should have part_id set and seller_part_number NULL.
+-- If any row violates the new check, this will fail loudly.
+UPDATE warehouse_inventory
+SET seller_part_number = NULL
+WHERE part_id IS NOT NULL AND seller_part_number IS NOT NULL;
+
+UPDATE warehouse_inventory
+SET part_id = NULL
+WHERE part_id IS NULL AND seller_part_number IS NULL;
diff --git a/pos/migrations/v3.4_meli_integration.sql b/pos/migrations/v3.4_meli_integration.sql
new file mode 100644
index 0000000..496cb1b
--- /dev/null
+++ b/pos/migrations/v3.4_meli_integration.sql
@@ -0,0 +1,110 @@
+-- ============================================================
+-- v3.4 MercadoLibre Integration
+-- ============================================================
+-- Adds tables for external marketplace listings, orders,
+-- order items, and a generic sync queue.
+-- All tables live in the tenant DB.
+-- ============================================================
+
+-- Listings published on MercadoLibre (extensible to Amazon later)
+CREATE TABLE IF NOT EXISTS marketplace_listings (
+    id                  SERIAL PRIMARY KEY,
+    inventory_id        INTEGER REFERENCES inventory(id),
+    channel             VARCHAR(20) NOT NULL DEFAULT 'mercadolibre',
+    external_item_id    VARCHAR(50) NOT NULL,
+    external_status     VARCHAR(30) DEFAULT 'active',
+    external_permalink  TEXT,
+    title               TEXT,
+    meli_category_id    VARCHAR(30),
+    publish_price       NUMERIC(12,2),
+    last_sync_at        TIMESTAMPTZ,
+    sync_errors         TEXT,
+    is_active           BOOLEAN DEFAULT true,
+    created_at          TIMESTAMPTZ DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_marketplace_listings_inventory
+    ON marketplace_listings(inventory_id);
+CREATE INDEX IF NOT EXISTS idx_marketplace_listings_external
+    ON marketplace_listings(external_item_id);
+CREATE UNIQUE INDEX IF NOT EXISTS idx_marketplace_listings_unique
+    ON marketplace_listings(inventory_id, channel) WHERE is_active = true;
+
+-- Orders received from MercadoLibre
+CREATE TABLE IF NOT EXISTS marketplace_orders (
+    id                  SERIAL PRIMARY KEY,
+    channel             VARCHAR(20) NOT NULL DEFAULT 'mercadolibre',
+    external_order_id   VARCHAR(50) NOT NULL UNIQUE,
+    external_status     VARCHAR(30) NOT NULL,
+    buyer_name          VARCHAR(200),
+    buyer_email         VARCHAR(200),
+    buyer_phone         VARCHAR(50),
+    buyer_nickname      VARCHAR(100),
+    shipping_address    JSONB,
+    total_amount        NUMERIC(12,2),
+    shipping_cost       NUMERIC(12,2),
+    meli_shipping_id    VARCHAR(50),
+    nexus_sale_id       INTEGER REFERENCES sales(id),
+    status              VARCHAR(20) DEFAULT 'pending',
+    notes               TEXT,
+    raw_json            JSONB,
+    created_at          TIMESTAMPTZ DEFAULT NOW(),
+    updated_at          TIMESTAMPTZ DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_marketplace_orders_status
+    ON marketplace_orders(status);
+CREATE INDEX IF NOT EXISTS idx_marketplace_orders_external
+    ON marketplace_orders(external_order_id);
+
+-- Items inside a marketplace order
+CREATE TABLE IF NOT EXISTS marketplace_order_items (
+    id                      SERIAL PRIMARY KEY,
+    marketplace_order_id    INTEGER REFERENCES marketplace_orders(id) ON DELETE CASCADE,
+    inventory_id            INTEGER REFERENCES inventory(id),
+    external_item_id        VARCHAR(50),
+    title                   VARCHAR(300),
+    quantity                INTEGER NOT NULL,
+    unit_price              NUMERIC(12,2),
+    total_price             NUMERIC(12,2),
+    listing_id              INTEGER REFERENCES marketplace_listings(id)
+);
+
+-- Generic sync queue (reusable for future Amazon integration)
+CREATE TABLE IF NOT EXISTS marketplace_sync_queue (
+    id              SERIAL PRIMARY KEY,
+    inventory_id    INTEGER REFERENCES inventory(id),
+    channel         VARCHAR(20) NOT NULL,
+    action          VARCHAR(20) NOT NULL,
+    status          VARCHAR(20) DEFAULT 'pending',
+    payload         JSONB,
+    error_message   TEXT,
+    retry_count     INT DEFAULT 0,
+    created_at      TIMESTAMPTZ DEFAULT NOW(),
+    processed_at    TIMESTAMPTZ
+);
+
+CREATE INDEX IF NOT EXISTS idx_marketplace_sync_queue_pending
+    ON marketplace_sync_queue(status, channel) WHERE status = 'pending';
+
+-- Add source column to sales to track origin (POS, ML, Amazon, etc.)
+-- If the column already exists from another migration, do nothing.
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM information_schema.columns
+        WHERE table_name = 'sales' AND column_name = 'source'
+    ) THEN
+        ALTER TABLE sales ADD COLUMN source VARCHAR(30) DEFAULT 'pos';
+    END IF;
+END $$;
+
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM information_schema.columns
+        WHERE table_name = 'sales' AND column_name = 'external_order_id'
+    ) THEN
+        ALTER TABLE sales ADD COLUMN external_order_id VARCHAR(50);
+    END IF;
+END $$;
diff --git a/pos/services/ai_chat.py b/pos/services/ai_chat.py
index cfe2dae..64df9cd 100644
--- a/pos/services/ai_chat.py
+++ b/pos/services/ai_chat.py
@@ -86,11 +86,42 @@ def _post_chat_completion(url, api_key, model_id, messages, max_tokens=800, temp
         return None
 
 
-SYSTEM_PROMPT_SHORT = """Eres un asistente de refaccionaria automotriz mexicana. Ayuda a encontrar autopartes.
+SYSTEM_PROMPT_SHORT = """Eres Juan, vendedor estrella de Autopartes Estrada. Llevas 10 años ayudando a mecanicos y dueños de taller. Tu estilo: directo, calido, sin rollos tecnicos. Hablas como un compa que sabe de carros.
+
+IMPORTANTE: NO prometas stock hasta verificar. Usa "Reviso...", "Busco...", "Déjame checar..." en vez de "Tengo..." a menos que estes 100% seguro.
+
 Responde SIEMPRE en formato JSON: {"message":"...","search_query":"...","vehicle":{"brand":"...","model":"...","year":...}}
-search_query va EN INGLES cuando el usuario pide una parte. Traducciones: Balatas=Brake Pad, Disco de freno=Brake Disc, Amortiguador=Shock Absorber, Filtro de aceite=Oil Filter, Filtro de aire=Air Filter, Bujias=Spark Plug, Banda=V-Belt, Bomba de agua=Water Pump, Alternador=Alternator, Radiador=Radiator, Sensor de oxigeno=Oxygen Sensor, Terminal de direccion=Tie Rod End, Bomba de gasolina=Fuel Pump, Clutch=Clutch Kit, Mofle=Exhaust, Inyector=Injector.
-No preguntes mas si ya puedes buscar. Si el usuario describe un sintoma, diagnostica y sugiere partes.
-Cuando pida cotizacion o multiples partes, search_query DEBE usar | para separar cada parte: "Brake Pad|Air Filter|Oil Filter|Spark Plug".
+
+REGLAS DE VENTA AVANZADAS:
+1. PRECIO AL FRENTE: Si hay stock, di precio y marca sin rodeos.
+2. KIT INTELIGENTE: Siempre sugiere 1-2 productos relacionados que se necesitan para el mismo trabajo.
+   - Balatas → "Ya que vas a cambiar balatas, checa si los discos tambien estan gastados. Te armo paquete con descuento."
+   - Alternador → "Mientras cambias alternador, conviene cambiar la banda serpentina para que no se te rompa despues."
+   - Filtro de aceite → "¿Ya tienes filtro de aire y bujias? Para servicio completo conviene cambiar todo junto."
+3. MANEJO DE OBJECIONES:
+   - "Esta caro" → "Te entiendo. Esta es marca original. Tambien manejo opcion economica. ¿Te mando las dos para comparar?"
+   - "Voy a checar en otro lado" → "Dale, te espero. Guardame este precio. Si encuentras mas barato, mandame foto de la cotizacion y veo si te la mejoro."
+   - "Lo necesito para hoy" / "Urgente" → "Perfecto. Tenemos entrega express en 2-4 horas o puedes pasar directo a la tienda. ¿Te lo armo ya?"
+   - "No se si sea esa" → "No hay problema. Dame los ultimos 4 digitos de tu VIN y te confirmo compatibilidad exacta."
+   - "Solo estoy cotizando" → "Claro, sin compromiso. Te armo la cotizacion y si decides despues, aqui queda guardada."
+4. CIERRE SUAVE (termina SIEMPRE con pregunta):
+   - "¿Te lo aparto?"
+   - "¿Lo mando a tu taller o lo pasas a recoger?"
+   - "¿Con esto quedas o necesitas algo mas?"
+   - "¿Te armo el paquete completo? Sale mejor que por separado."
+5. RECONOCIMIENTO DE CLIENTE: Si el contexto dice que compro antes, mencionalo. "Veo que compraste balatas hace 6 meses. ¿Ya es hora de cambiar las del otro eje?"
+6. DIAGNOSTICO RAPIDO: Si describe sintoma, diagnostica en 1-2 frases y sugiere 2-3 partes mas probables.
+
+TRADUCCIONES search_query (EN INGLES):
+Balatas=Brake Pad, Disco de freno=Brake Disc, Amortiguador=Shock Absorber, Filtro de aceite=Oil Filter, Filtro de aire=Air Filter, Bujias=Spark Plug, Banda=V-Belt, Bomba de agua=Water Pump, Alternador=Alternator, Radiador=Radiator, Sensor de oxigeno=Oxygen Sensor, Terminal de direccion=Tie Rod End, Bomba de gasolina=Fuel Pump, Clutch=Clutch Kit, Mofle=Exhaust, Inyector=Injector, Banda de distribucion=Timing Belt, Tensor=Belt Tensioner, Junta homocinetica=CV Joint, Marcha=Starter Motor, Bateria=Battery, Aceite=Engine Oil, Refrigerante=Coolant.
+
+FORMATO:
+- search_query EN INGLES. NUNCA null si pide algo.
+- vehicle: {"brand":"NISSAN","model":"Frontier","year":2019} marca en MAYUSCULAS.
+- Multiples partes: "Brake Pad|Brake Disc|Brake Fluid"
+- Mensaje maximo 4 lineas cortas. Lenguaje natural, nada robotico.
+- Si ya detectaste vehiculo en conversacion anterior, NO vuelvas a pedirlo.
+- Termina SIEMPRE con una pregunta de cierre.
 """
 
 SYSTEM_PROMPT = """Eres un asistente de refaccionaria automotriz mexicana. Tu trabajo es ayudar a encontrar autopartes.
@@ -195,11 +226,24 @@ def get_inventory_context(tenant_conn, branch_id=None):
             WHERE {where} AND i.brand IS NOT NULL AND i.brand != ''
             GROUP BY i.brand
             ORDER BY cnt DESC
-            LIMIT 15
+            LIMIT 10
         """, params)
         brands = cur.fetchall()
         brand_list = ", ".join(f"{row[0]} ({row[1]})" for row in brands if row[0])
 
+        # Top categories with counts
+        cur.execute(f"""
+            SELECT c.name, COUNT(*) as cnt
+            FROM inventory i
+            JOIN part_categories c ON c.id = i.category_id
+            WHERE {where} AND c.name IS NOT NULL AND c.name != ''
+            GROUP BY c.name
+            ORDER BY cnt DESC
+            LIMIT 10
+        """, params)
+        categories = cur.fetchall()
+        category_list = ", ".join(f"{row[0]} ({row[1]})" for row in categories if row[0])
+
         # Products with low stock (<=3)
         cur.execute(f"""
             SELECT COUNT(*) FROM inventory i
@@ -212,10 +256,12 @@ def get_inventory_context(tenant_conn, branch_id=None):
             "CONTEXTO DEL INVENTARIO:",
             f"Este negocio tiene {total} productos en inventario.",
         ]
+        if category_list:
+            lines.append(f"Categorias principales: {category_list}")
         if brand_list:
-            lines.append(f"Marcas disponibles: {brand_list}")
+            lines.append(f"Marcas top: {brand_list}")
         lines.append(f"Productos con stock bajo (<=3 unidades): {low_stock}")
-        lines.append("IMPORTANTE: Cuando busques partes, SIEMPRE prioriza lo que el negocio tiene en inventario local.")
+        lines.append("IMPORTANTE: Cuando busques partes, SIEMPRE prioriza lo que el negocio tiene en inventario local. Si no hay stock exacto, sugiere alternativa similar.")
 
         return "\n".join(lines)
     except Exception:
@@ -284,10 +330,10 @@ def chat_with_image(user_message, image_base64, conversation_history=None, inven
     ]
     messages.append({"role": "user", "content": user_content})
 
-    # Try Hermes first for vision (if enabled), fallback to OpenRouter
+    # Vision backends: QWEN only, fallback to OpenRouter if key present
     backends = []
-    if HERMES_ENABLED:
-        backends.append((HERMES_CHAT_URL, HERMES_API_KEY, HERMES_VISION_MODEL))
+    if QWEN_ENABLED:
+        backends.append((QWEN_CHAT_URL, QWEN_API_KEY, QWEN_MODEL))
     if OPENROUTER_API_KEY:
         backends.append((OPENROUTER_URL, OPENROUTER_API_KEY, VISION_MODEL))
     
@@ -339,10 +385,10 @@ def classify_part(part_number):
         {"role": "user", "content": prompt}
     ]
 
-    # Try Hermes first (if enabled), fallback to OpenRouter
+    # Backends: QWEN only, fallback to OpenRouter if key present
     backends = []
-    if HERMES_ENABLED:
-        backends.append((HERMES_CHAT_URL, HERMES_API_KEY, HERMES_MODEL))
+    if QWEN_ENABLED:
+        backends.append((QWEN_CHAT_URL, QWEN_API_KEY, QWEN_MODEL))
     if OPENROUTER_API_KEY:
         backends.append((OPENROUTER_URL, OPENROUTER_API_KEY, MODEL))
     
@@ -528,12 +574,10 @@ def chat(user_message, conversation_history=None, inventory_context=None):
 
     last_error = None
 
-    # Build backend list: QWEN first (fast, ~1s), then Hermes (specialized, ~30s), then OpenRouter
+    # Build backend list: QWEN first, then OpenRouter fallback
     backends = []
     if QWEN_ENABLED:
-        backends.append((QWEN_CHAT_URL, QWEN_API_KEY, QWEN_MODEL, 35, SYSTEM_PROMPT_SHORT, 4000))
-    if HERMES_ENABLED:
-        backends.append((HERMES_CHAT_URL, HERMES_API_KEY, HERMES_MODEL, 45, SYSTEM_PROMPT, 800))
+        backends.append((QWEN_CHAT_URL, QWEN_API_KEY, QWEN_MODEL, 18, SYSTEM_PROMPT_SHORT, 1200))
     if OPENROUTER_API_KEY:
         for m in FALLBACK_MODELS:
             backends.append((OPENROUTER_URL, OPENROUTER_API_KEY, m, 25, SYSTEM_PROMPT, 800))
@@ -548,14 +592,22 @@ def chat(user_message, conversation_history=None, inventory_context=None):
         if conversation_history:
             msgs.extend(conversation_history)
         msgs.append({"role": "user", "content": user_message})
-        result = _post_chat_completion(url, key, model_id, msgs, max_tokens=max_tok, temperature=0.3, timeout=timeout_sec)
+
+        # Retry logic: QWEN gets 3 attempts with 2s delay because the API is flaky
+        max_retries = 3 if url == QWEN_CHAT_URL else 1
+        result = None
+        for attempt in range(1, max_retries + 1):
+            result = _post_chat_completion(url, key, model_id, msgs, max_tokens=max_tok, temperature=0.3, timeout=timeout_sec)
+            if result is not None:
+                break
+            if attempt < max_retries:
+                print(f"[AI] QWEN attempt {attempt} failed, retrying in 2s...")
+                _time_chat.sleep(2)
+
         if result is None:
             if url == QWEN_CHAT_URL:
-                print(f"[AI] QWEN failed, trying Hermes fallback...")
+                print(f"[AI] QWEN failed after {max_retries} attempts, trying fallback...")
                 last_error = "qwen_failed"
-            elif url == HERMES_CHAT_URL:
-                print(f"[AI] Hermes failed, trying OpenRouter fallback...")
-                last_error = "hermes_timeout"
             else:
                 print(f"[AI] Rate limited on {model_id}, trying next model...")
                 last_error = "rate_limit"
@@ -589,7 +641,7 @@ def chat(user_message, conversation_history=None, inventory_context=None):
     # All models exhausted — DON'T cache errors, we want retries next time
     if last_error == "rate_limit":
         return {"message": "El asistente está ocupado. Intenta de nuevo en unos segundos.", "search_query": None, "vehicle": None}
-    if last_error == "hermes_timeout":
+    if last_error == "qwen_failed":
         return {"message": "El asistente tardó mucho en responder. Intenta de nuevo en un momento.", "search_query": None, "vehicle": None}
     return {
         "message": "El asistente no está disponible en este momento. Intenta de nuevo en unos segundos.",
diff --git a/pos/services/catalog_service.py b/pos/services/catalog_service.py
index 4b0603e..c3b54dd 100644
--- a/pos/services/catalog_service.py
+++ b/pos/services/catalog_service.py
@@ -230,29 +230,42 @@ def get_engines(master_conn, model_id, year_id):
     return [{'id_mye': r[0], 'name_engine': r[1], 'trim_level': r[2] or ''} for r in rows]
 
 
-def get_categories(master_conn, mye_id):
+def get_categories(master_conn, mye_id, allowed_brands=None):
     """Get part categories that have parts for this vehicle (mye_id).
 
     Uses a subquery on vehicle_parts filtered by mye_id (indexed),
     then JOINs through parts -> part_groups -> part_categories.
     Uses COUNT with a safety LIMIT on the subquery.
+
+    If allowed_brands is provided, only counts parts that have at least one
+    aftermarket equivalent from those manufacturers.
     """
     cur = master_conn.cursor()
-    cur.execute("""
+    brand_filter = ""
+    params = [mye_id]
+    if allowed_brands:
+        brand_filter = """AND EXISTS (
+            SELECT 1 FROM aftermarket_parts ap2
+            JOIN manufacturers m2 ON m2.id_manufacture = ap2.manufacturer_id
+            WHERE ap2.oem_part_id = p.id_part AND UPPER(m2.name_manufacture) = ANY(%s)
+        )"""
+        params.append(allowed_brands)
+    cur.execute(f"""
         SELECT pc.id_part_category,
                COALESCE(pc.name_es, pc.name_part_category) AS name,
                sub.cnt
         FROM (
-            SELECT pg.category_id, COUNT(*) AS cnt
+            SELECT pg.category_id, COUNT(DISTINCT p.id_part) AS cnt
             FROM vehicle_parts vp
             JOIN parts p ON p.id_part = vp.part_id
             JOIN part_groups pg ON pg.id_part_group = p.group_id
             WHERE vp.model_year_engine_id = %s
+            {brand_filter}
             GROUP BY pg.category_id
         ) sub
         JOIN part_categories pc ON pc.id_part_category = sub.category_id
         ORDER BY name
-    """, (mye_id,))
+    """, params)
     rows = cur.fetchall()
     cur.close()
     return [{'id_part_category': r[0], 'name': translate_category(r[1]), 'part_count': r[2]} for r in rows]
diff --git a/pos/services/geo_branches.py b/pos/services/geo_branches.py
new file mode 100644
index 0000000..51d10ed
--- /dev/null
+++ b/pos/services/geo_branches.py
@@ -0,0 +1,56 @@
+import math
+
+def haversine(lat1, lon1, lat2, lon2):
+    """Calculate the great-circle distance between two points on Earth in km."""
+    R = 6371.0  # Earth radius in km
+    phi1 = math.radians(lat1)
+    phi2 = math.radians(lat2)
+    dphi = math.radians(lat2 - lat1)
+    dlambda = math.radians(lon2 - lon1)
+
+    a = math.sin(dphi / 2) ** 2 + math.cos(phi1) * math.cos(phi2) * math.sin(dlambda / 2) ** 2
+    c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a))
+
+    return R * c
+
+
+def find_nearest_branch(tenant_conn, latitude, longitude):
+    """
+    Find the nearest active branch with coordinates.
+    Returns a dict with branch info + distance_km, or None.
+    """
+    if not tenant_conn or latitude is None or longitude is None:
+        return None
+
+    cur = tenant_conn.cursor()
+    cur.execute(
+        """
+        SELECT id, name, address, phone, latitude, longitude
+        FROM branches
+        WHERE is_active = TRUE AND latitude IS NOT NULL AND longitude IS NOT NULL
+        """
+    )
+    branches = cur.fetchall()
+    cur.close()
+
+    nearest = None
+    min_dist = float('inf')
+
+    for row in branches:
+        bid, name, address, phone, b_lat, b_lon = row
+        if b_lat is None or b_lon is None:
+            continue
+        dist = haversine(float(latitude), float(longitude), float(b_lat), float(b_lon))
+        if dist < min_dist:
+            min_dist = dist
+            nearest = {
+                'id': bid,
+                'name': name,
+                'address': address or '',
+                'phone': phone or '',
+                'latitude': float(b_lat),
+                'longitude': float(b_lon),
+                'distance_km': round(dist, 1),
+            }
+
+    return nearest
diff --git a/pos/services/marketplace_external_service.py b/pos/services/marketplace_external_service.py
new file mode 100644
index 0000000..d140a29
--- /dev/null
+++ b/pos/services/marketplace_external_service.py
@@ -0,0 +1,978 @@
+"""Business logic for MercadoLibre external marketplace integration.
+
+Depends on:
+  - meli_service.py        (HTTP client)
+  - pos_engine.py          (sale creation)
+  - inventory_engine.py    (stock queries)
+  - image_service.py       (image URLs)
+"""
+
+import json
+import logging
+from typing import Optional
+from decimal import Decimal
+
+from services.meli_service import MeliService, MeliError, MeliAuthError
+from services.pos_engine import process_sale, calculate_totals
+from services.inventory_engine import get_stock, get_stock_bulk
+
+logger = logging.getLogger(__name__)
+
+
+# ═══════════════════════════════════════════════════════════════════════════
+# CONFIG HELPERS
+# ═══════════════════════════════════════════════════════════════════════════
+
+MELI_CONFIG_KEYS = [
+    "meli_access_token",
+    "meli_refresh_token",
+    "meli_user_id",
+    "meli_site_id",
+    "meli_enabled",
+    "meli_auto_publish",
+    "meli_sync_interval_min",
+    "meli_order_sync_interval_min",
+    "meli_default_category_id",
+    "meli_shipping_mode",
+    "meli_client_id",
+    "meli_client_secret",
+]
+
+
+def _get_config_value(cur, key: str, default=None):
+    cur.execute("SELECT value FROM tenant_config WHERE key = %s", (key,))
+    row = cur.fetchone()
+    return row[0] if row else default
+
+
+def get_meli_config(tenant_conn) -> dict:
+    """Read ML config from tenant_config."""
+    cur = tenant_conn.cursor()
+    cfg = {}
+    for key in MELI_CONFIG_KEYS:
+        cfg[key] = _get_config_value(cur, key)
+    cur.close()
+    # Normalize booleans
+    cfg["meli_enabled"] = (cfg.get("meli_enabled") or "").lower() == "true"
+    cfg["meli_auto_publish"] = (cfg.get("meli_auto_publish") or "").lower() == "true"
+    cfg["meli_sync_interval_min"] = int(cfg.get("meli_sync_interval_min") or 15)
+    cfg["meli_order_sync_interval_min"] = int(cfg.get("meli_order_sync_interval_min") or 5)
+    return cfg
+
+
+def save_meli_config(tenant_conn, updates: dict) -> None:
+    """Upsert ML config keys into tenant_config."""
+    cur = tenant_conn.cursor()
+    for key, value in updates.items():
+        if value is None:
+            continue
+        cur.execute(
+            """
+            INSERT INTO tenant_config (key, value, updated_at)
+            VALUES (%s, %s, NOW())
+            ON CONFLICT (key) DO UPDATE SET value = EXCLUDED.value, updated_at = NOW()
+            """,
+            (key, str(value)),
+        )
+    tenant_conn.commit()
+    cur.close()
+
+
+def delete_meli_config(tenant_conn) -> None:
+    """Remove all ML config keys."""
+    cur = tenant_conn.cursor()
+    cur.execute(
+        "DELETE FROM tenant_config WHERE key LIKE 'meli_%'"
+    )
+    tenant_conn.commit()
+    cur.close()
+
+
+def _get_meli_service(cfg: dict) -> Optional[MeliService]:
+    """Build MeliService from config dict."""
+    token = cfg.get("meli_access_token")
+    if not token:
+        return None
+    return MeliService(
+        access_token=token,
+        refresh_token=cfg.get("meli_refresh_token"),
+        client_id=cfg.get("meli_client_id"),
+        client_secret=cfg.get("meli_client_secret"),
+    )
+
+
+# ═══════════════════════════════════════════════════════════════════════════
+# ITEM PAYLOAD BUILDER
+# ═══════════════════════════════════════════════════════════════════════════
+
+def _extract_meli_error(err: MeliError) -> str:
+    """Extract the most useful error message from a MeliError response."""
+    base = str(err)
+    body = err.response_body
+    if not body:
+        return base
+    try:
+        data = json.loads(body)
+        msg = data.get("message") or data.get("error")
+        causes = data.get("cause", [])
+        if causes and isinstance(causes, list):
+            cause_msgs = [c.get("message") for c in causes if c.get("message")]
+            if cause_msgs:
+                msg = (msg + " | " if msg else "") + "; ".join(cause_msgs)
+        if msg:
+            return msg
+    except Exception:
+        pass
+    return base
+
+
+def build_item_payload(
+    inventory_row: dict,
+    images: list[str],
+    meli_category_id: str,
+    price: float,
+    stock: int,
+    shipping_mode: str = "me2",
+    listing_type_id: str = "gold_special",
+) -> dict:
+    """Convert a Nexus inventory row into a MercadoLibre item payload."""
+    title = f"{inventory_row['name']} {inventory_row['brand'] or ''} {inventory_row['part_number'] or ''}".strip()
+    # ML title limit is 60 chars; truncate smartly
+    if len(title) > 60:
+        title = title[:57] + "..."
+
+    payload = {
+        "title": title,
+        "category_id": meli_category_id,
+        "price": round(float(price), 2),
+        "currency_id": "MXN",
+        "available_quantity": max(int(stock), 0),
+        "buying_mode": "buy_it_now",
+        "listing_type_id": listing_type_id,
+        "condition": "new",
+        "pictures": [{"source": url} for url in images if url],
+        "shipping": {"mode": shipping_mode},
+        "attributes": [],
+    }
+
+    if inventory_row.get("brand"):
+        payload["attributes"].append(
+            {"id": "BRAND", "value_name": inventory_row["brand"]}
+        )
+
+    if inventory_row.get("part_number"):
+        payload["attributes"].append(
+            {"id": "PART_NUMBER", "value_name": inventory_row["part_number"]}
+        )
+
+    # Vehicle compatibility as attributes (if available)
+    vehicle_compat = inventory_row.get("vehicle_compatibility")
+    if vehicle_compat:
+        if isinstance(vehicle_compat, str):
+            try:
+                vehicle_compat = json.loads(vehicle_compat)
+            except Exception:
+                vehicle_compat = None
+        if isinstance(vehicle_compat, list) and vehicle_compat:
+            first = vehicle_compat[0]
+            if isinstance(first, dict):
+                if first.get("brand"):
+                    payload["attributes"].append(
+                        {"id": "VEHICLE_MODEL", "value_name": first["brand"]}
+                    )
+                if first.get("model"):
+                    payload["attributes"].append(
+                        {"id": "VEHICLE_MODEL_NAME", "value_name": first["model"]}
+                    )
+
+    return payload
+
+
+# ═══════════════════════════════════════════════════════════════════════════
+# LISTINGS CRUD
+# ═══════════════════════════════════════════════════════════════════════════
+
+def publish_items(
+    tenant_conn,
+    inventory_ids: list[int],
+    meli_category_id: str,
+    listing_type_id: str = "gold_special",
+    shipping_mode: str = "me2",
+) -> dict:
+    """Publish one or more inventory items to MercadoLibre.
+
+    Returns summary dict with success/failure per item.
+    """
+    cfg = get_meli_config(tenant_conn)
+    svc = _get_meli_service(cfg)
+    if not svc:
+        raise ValueError("MercadoLibre not configured")
+
+    cur = tenant_conn.cursor()
+
+    # Batch fetch inventory rows
+    cur.execute(
+        """
+        SELECT id, part_number, name, brand, price_1, vehicle_compatibility,
+               image_url, unit, is_active
+        FROM inventory
+        WHERE id = ANY(%s) AND is_active = true
+        """,
+        (inventory_ids,),
+    )
+    rows = {r[0]: r for r in cur.fetchall()}
+
+    # Batch fetch stock
+    stock_map = get_stock_bulk(tenant_conn, branch_id=None)
+
+    results = {"success": [], "failed": []}
+
+    for inv_id in inventory_ids:
+        row = rows.get(inv_id)
+        if not row:
+            results["failed"].append({"inventory_id": inv_id, "error": "Not found or inactive"})
+            continue
+
+        inv = {
+            "id": row[0],
+            "part_number": row[1],
+            "name": row[2],
+            "brand": row[3],
+            "price_1": float(row[4]) if row[4] else 0,
+            "vehicle_compatibility": row[5],
+            "image_url": row[6],
+            "unit": row[7],
+        }
+
+        stock = stock_map.get(inv_id, 0)
+        if stock <= 0:
+            results["failed"].append({"inventory_id": inv_id, "error": "Sin stock disponible"})
+            continue
+
+        if inv["price_1"] <= 0:
+            results["failed"].append({"inventory_id": inv_id, "error": "El precio debe ser mayor a 0"})
+            continue
+
+        # Build image list
+        images = []
+        if inv.get("image_url"):
+            images.append(inv["image_url"])
+        # TODO: fetch additional images from a separate table if we have gallery support
+
+        if not images:
+            results["failed"].append({"inventory_id": inv_id, "error": "El producto no tiene imagen. ML requiere imagen para publicar."})
+            continue
+
+        payload = build_item_payload(
+            inv, images, meli_category_id, inv["price_1"], stock,
+            shipping_mode=shipping_mode, listing_type_id=listing_type_id,
+        )
+
+        try:
+            ml_item = svc.create_item(payload)
+            external_item_id = ml_item.get("id")
+            permalink = ml_item.get("permalink")
+
+            # Persist listing
+            cur.execute(
+                """
+                INSERT INTO marketplace_listings
+                    (inventory_id, channel, external_item_id, external_status,
+                     external_permalink, title, meli_category_id, publish_price,
+                     last_sync_at, sync_errors, is_active)
+                VALUES (%s, 'mercadolibre', %s, 'active', %s, %s, %s, %s, NOW(), NULL, true)
+                ON CONFLICT (inventory_id, channel) WHERE is_active = true
+                DO UPDATE SET
+                    external_item_id = EXCLUDED.external_item_id,
+                    external_status = EXCLUDED.external_status,
+                    external_permalink = EXCLUDED.external_permalink,
+                    title = EXCLUDED.title,
+                    meli_category_id = EXCLUDED.meli_category_id,
+                    publish_price = EXCLUDED.publish_price,
+                    last_sync_at = NOW(),
+                    sync_errors = NULL,
+                    is_active = true
+                """,
+                (
+                    inv_id,
+                    external_item_id,
+                    permalink,
+                    payload["title"],
+                    meli_category_id,
+                    inv["price_1"],
+                ),
+            )
+            tenant_conn.commit()
+            results["success"].append(
+                {"inventory_id": inv_id, "external_item_id": external_item_id, "permalink": permalink}
+            )
+        except MeliError as e:
+            tenant_conn.rollback()
+            err_msg = _extract_meli_error(e)
+            logger.warning("ML publish failed for inventory_id=%s: %s | payload=%s | response=%s", inv_id, err_msg, json.dumps(payload), e.response_body)
+            results["failed"].append({"inventory_id": inv_id, "error": err_msg})
+        except Exception as e:
+            tenant_conn.rollback()
+            logger.exception("Unexpected error publishing inventory_id=%s", inv_id)
+            results["failed"].append({"inventory_id": inv_id, "error": str(e)})
+
+    cur.close()
+    return results
+
+
+def get_listings(tenant_conn, page: int = 1, per_page: int = 50, status: str = None):
+    cur = tenant_conn.cursor()
+    where = ["1=1"]
+    params = []
+    if status:
+        where.append("external_status = %s")
+        params.append(status)
+
+    count_sql = f"SELECT COUNT(*) FROM marketplace_listings WHERE {' AND '.join(where)}"
+    cur.execute(count_sql, params)
+    total = cur.fetchone()[0]
+
+    sql = f"""
+        SELECT l.id, l.inventory_id, l.external_item_id, l.external_status,
+               l.external_permalink, l.title, l.meli_category_id, l.publish_price,
+               l.last_sync_at, l.sync_errors, l.is_active, l.created_at,
+               i.part_number, i.name, i.price_1, i.brand
+        FROM marketplace_listings l
+        JOIN inventory i ON i.id = l.inventory_id
+        WHERE {' AND '.join(where)}
+        ORDER BY l.created_at DESC
+        LIMIT %s OFFSET %s
+    """
+    cur.execute(sql, params + [per_page, (page - 1) * per_page])
+    rows = cur.fetchall()
+    cur.close()
+
+    items = []
+    for r in rows:
+        items.append({
+            "id": r[0],
+            "inventory_id": r[1],
+            "external_item_id": r[2],
+            "external_status": r[3],
+            "external_permalink": r[4],
+            "title": r[5],
+            "meli_category_id": r[6],
+            "publish_price": float(r[7]) if r[7] else None,
+            "last_sync_at": str(r[8]) if r[8] else None,
+            "sync_errors": r[9],
+            "is_active": r[10],
+            "created_at": str(r[11]),
+            "part_number": r[12],
+            "inventory_name": r[13],
+            "current_price": float(r[14]) if r[14] else None,
+            "brand": r[15],
+        })
+
+    return {"items": items, "total": total, "page": page, "per_page": per_page}
+
+
+def sync_listing(tenant_conn, listing_id: int) -> dict:
+    """Force a manual sync of stock/price for a single listing."""
+    cfg = get_meli_config(tenant_conn)
+    svc = _get_meli_service(cfg)
+    if not svc:
+        raise ValueError("MercadoLibre not configured")
+
+    cur = tenant_conn.cursor()
+    cur.execute(
+        """
+        SELECT id, inventory_id, external_item_id, meli_category_id
+        FROM marketplace_listings WHERE id = %s AND is_active = true
+        """,
+        (listing_id,),
+    )
+    row = cur.fetchone()
+    if not row:
+        cur.close()
+        raise ValueError("Listing not found")
+
+    listing = {
+        "id": row[0],
+        "inventory_id": row[1],
+        "external_item_id": row[2],
+        "meli_category_id": row[3],
+    }
+
+    # Get current stock/price
+    cur.execute(
+        "SELECT price_1 FROM inventory WHERE id = %s",
+        (listing["inventory_id"],),
+    )
+    price_row = cur.fetchone()
+    current_price = float(price_row[0]) if price_row and price_row[0] else 0
+
+    stock_map = get_stock_bulk(tenant_conn, branch_id=None)
+    current_stock = stock_map.get(listing["inventory_id"], 0)
+
+    try:
+        svc.update_item(
+            listing["external_item_id"],
+            {"price": round(current_price, 2), "available_quantity": max(current_stock, 0)},
+        )
+        cur.execute(
+            """
+            UPDATE marketplace_listings
+            SET last_sync_at = NOW(), sync_errors = NULL, publish_price = %s
+            WHERE id = %s
+            """,
+            (current_price, listing_id),
+        )
+        tenant_conn.commit()
+        cur.close()
+        return {"ok": True, "price": current_price, "stock": current_stock}
+    except MeliError as e:
+        tenant_conn.rollback()
+        cur.execute(
+            "UPDATE marketplace_listings SET sync_errors = %s WHERE id = %s",
+            (str(e)[:500], listing_id),
+        )
+        tenant_conn.commit()
+        cur.close()
+        raise
+
+
+def pause_listing(tenant_conn, listing_id: int) -> dict:
+    cfg = get_meli_config(tenant_conn)
+    svc = _get_meli_service(cfg)
+    if not svc:
+        raise ValueError("MercadoLibre not configured")
+
+    cur = tenant_conn.cursor()
+    cur.execute(
+        "SELECT external_item_id FROM marketplace_listings WHERE id = %s",
+        (listing_id,),
+    )
+    row = cur.fetchone()
+    if not row:
+        cur.close()
+        raise ValueError("Listing not found")
+
+    svc.pause_item(row[0])
+    cur.execute(
+        "UPDATE marketplace_listings SET external_status = 'paused' WHERE id = %s",
+        (listing_id,),
+    )
+    tenant_conn.commit()
+    cur.close()
+    return {"ok": True, "status": "paused"}
+
+
+def activate_listing(tenant_conn, listing_id: int) -> dict:
+    cfg = get_meli_config(tenant_conn)
+    svc = _get_meli_service(cfg)
+    if not svc:
+        raise ValueError("MercadoLibre not configured")
+
+    cur = tenant_conn.cursor()
+    cur.execute(
+        "SELECT external_item_id FROM marketplace_listings WHERE id = %s",
+        (listing_id,),
+    )
+    row = cur.fetchone()
+    if not row:
+        cur.close()
+        raise ValueError("Listing not found")
+
+    svc.activate_item(row[0])
+    cur.execute(
+        "UPDATE marketplace_listings SET external_status = 'active' WHERE id = %s",
+        (listing_id,),
+    )
+    tenant_conn.commit()
+    cur.close()
+    return {"ok": True, "status": "active"}
+
+
+def close_listing(tenant_conn, listing_id: int) -> dict:
+    cfg = get_meli_config(tenant_conn)
+    svc = _get_meli_service(cfg)
+    if not svc:
+        raise ValueError("MercadoLibre not configured")
+
+    cur = tenant_conn.cursor()
+    cur.execute(
+        "SELECT external_item_id FROM marketplace_listings WHERE id = %s",
+        (listing_id,),
+    )
+    row = cur.fetchone()
+    if not row:
+        cur.close()
+        raise ValueError("Listing not found")
+
+    svc.close_item(row[0])
+    cur.execute(
+        "UPDATE marketplace_listings SET external_status = 'closed', is_active = false WHERE id = %s",
+        (listing_id,),
+    )
+    tenant_conn.commit()
+    cur.close()
+    return {"ok": True, "status": "closed"}
+
+
+# ═══════════════════════════════════════════════════════════════════════════
+# ORDERS
+# ═══════════════════════════════════════════════════════════════════════════
+
+def fetch_and_save_orders(tenant_conn, date_from: Optional[str] = None) -> dict:
+    """Pull orders from ML and upsert into marketplace_orders."""
+    cfg = get_meli_config(tenant_conn)
+    svc = _get_meli_service(cfg)
+    user_id = cfg.get("meli_user_id")
+    if not svc or not user_id:
+        raise ValueError("MercadoLibre not configured")
+
+    ml_resp = svc.get_orders(user_id, status="paid", date_from=date_from)
+    orders = ml_resp.get("results", [])
+
+    cur = tenant_conn.cursor()
+    created = 0
+    updated = 0
+
+    for order_summary in orders:
+        order_id = order_summary.get("id")
+        if not order_id:
+            continue
+
+        # Fetch full order detail
+        try:
+            full = svc.get_order(str(order_id))
+        except MeliError:
+            continue
+
+        external_status = full.get("status")
+        buyer = full.get("buyer", {})
+        shipping = full.get("shipping", {})
+        order_items = full.get("order_items", [])
+
+        # Build shipping address JSON
+        shipping_address = None
+        if shipping:
+            shipping_address = {
+                "id": shipping.get("id"),
+                "status": shipping.get("status"),
+                "tracking_number": shipping.get("tracking_number"),
+                "shipping_method": shipping.get("shipping_option", {}).get("name"),
+            }
+
+        total_amount = full.get("total_amount")
+        shipping_cost = shipping.get("cost") if shipping else None
+
+        # Upsert order
+        cur.execute(
+            """
+            INSERT INTO marketplace_orders
+                (channel, external_order_id, external_status, buyer_name,
+                 buyer_email, buyer_phone, buyer_nickname, shipping_address,
+                 total_amount, shipping_cost, meli_shipping_id, raw_json, updated_at)
+            VALUES ('mercadolibre', %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, NOW())
+            ON CONFLICT (external_order_id) DO UPDATE SET
+                external_status = EXCLUDED.external_status,
+                buyer_name = EXCLUDED.buyer_name,
+                buyer_email = EXCLUDED.buyer_email,
+                buyer_phone = EXCLUDED.buyer_phone,
+                shipping_address = EXCLUDED.shipping_address,
+                total_amount = EXCLUDED.total_amount,
+                shipping_cost = EXCLUDED.shipping_cost,
+                meli_shipping_id = EXCLUDED.meli_shipping_id,
+                raw_json = EXCLUDED.raw_json,
+                updated_at = NOW()
+            RETURNING id
+            """,
+            (
+                str(order_id),
+                external_status,
+                buyer.get("first_name", "") + " " + buyer.get("last_name", ""),
+                buyer.get("email"),
+                buyer.get("phone", {}).get("number"),
+                buyer.get("nickname"),
+                json.dumps(shipping_address) if shipping_address else None,
+                total_amount,
+                shipping_cost,
+                str(shipping.get("id")) if shipping else None,
+                json.dumps(full),
+            ),
+        )
+        row = cur.fetchone()
+        mpo_id = row[0] if row else None
+
+        if mpo_id:
+            # Check if this was insert or update
+            cur.execute(
+                "SELECT created_at FROM marketplace_orders WHERE id = %s",
+                (mpo_id,),
+            )
+            created_at = cur.fetchone()[0]
+            # Simple heuristic: if updated_at == created_at (within 1s), it's new
+            is_new = True  # ON CONFLICT always returns id; we count as updated for simplicity
+            updated += 1
+
+        # Upsert order items
+        if mpo_id and order_items:
+            # Clear old items and re-insert
+            cur.execute(
+                "DELETE FROM marketplace_order_items WHERE marketplace_order_id = %s",
+                (mpo_id,),
+            )
+            for it in order_items:
+                item_data = it.get("item", {})
+                cur.execute(
+                    """
+                    INSERT INTO marketplace_order_items
+                        (marketplace_order_id, external_item_id, title,
+                         quantity, unit_price, total_price)
+                    VALUES (%s, %s, %s, %s, %s, %s)
+                    """,
+                    (
+                        mpo_id,
+                        item_data.get("id"),
+                        item_data.get("title"),
+                        it.get("quantity"),
+                        it.get("unit_price"),
+                        it.get("full_unit_price"),
+                    ),
+                )
+
+    tenant_conn.commit()
+    cur.close()
+    return {"processed": len(orders), "updated": updated}
+
+
+def get_orders(tenant_conn, page=1, per_page=50, status=None):
+    cur = tenant_conn.cursor()
+    where = ["1=1"]
+    params = []
+    if status:
+        where.append("status = %s")
+        params.append(status)
+
+    cur.execute(
+        f"SELECT COUNT(*) FROM marketplace_orders WHERE {' AND '.join(where)}",
+        params,
+    )
+    total = cur.fetchone()[0]
+
+    cur.execute(
+        f"""
+        SELECT o.id, o.external_order_id, o.external_status, o.buyer_name,
+               o.buyer_nickname, o.total_amount, o.status, o.created_at,
+               o.nexus_sale_id
+        FROM marketplace_orders o
+        WHERE {' AND '.join(where)}
+        ORDER BY o.created_at DESC
+        LIMIT %s OFFSET %s
+        """,
+        params + [per_page, (page - 1) * per_page],
+    )
+    rows = cur.fetchall()
+    cur.close()
+
+    items = []
+    for r in rows:
+        items.append({
+            "id": r[0],
+            "external_order_id": r[1],
+            "external_status": r[2],
+            "buyer_name": r[3],
+            "buyer_nickname": r[4],
+            "total_amount": float(r[5]) if r[5] else None,
+            "status": r[6],
+            "created_at": str(r[7]),
+            "nexus_sale_id": r[8],
+        })
+    return {"items": items, "total": total, "page": page, "per_page": per_page}
+
+
+def get_order_detail(tenant_conn, order_id: int) -> dict:
+    cur = tenant_conn.cursor()
+    cur.execute(
+        """
+        SELECT id, external_order_id, external_status, buyer_name, buyer_email,
+               buyer_phone, buyer_nickname, shipping_address, total_amount,
+               shipping_cost, meli_shipping_id, nexus_sale_id, status, notes,
+               raw_json, created_at, updated_at
+        FROM marketplace_orders WHERE id = %s
+        """,
+        (order_id,),
+    )
+    row = cur.fetchone()
+    if not row:
+        cur.close()
+        raise ValueError("Order not found")
+
+    order = {
+        "id": row[0],
+        "external_order_id": row[1],
+        "external_status": row[2],
+        "buyer_name": row[3],
+        "buyer_email": row[4],
+        "buyer_phone": row[5],
+        "buyer_nickname": row[6],
+        "shipping_address": row[7],
+        "total_amount": float(row[8]) if row[8] else None,
+        "shipping_cost": float(row[9]) if row[9] else None,
+        "meli_shipping_id": row[10],
+        "nexus_sale_id": row[11],
+        "status": row[12],
+        "notes": row[13],
+        "raw_json": row[14],
+        "created_at": str(row[15]),
+        "updated_at": str(row[16]),
+    }
+
+    cur.execute(
+        """
+        SELECT id, inventory_id, external_item_id, title, quantity,
+               unit_price, total_price
+        FROM marketplace_order_items WHERE marketplace_order_id = %s
+        """,
+        (order_id,),
+    )
+    items = []
+    for r in cur.fetchall():
+        items.append({
+            "id": r[0],
+            "inventory_id": r[1],
+            "external_item_id": r[2],
+            "title": r[3],
+            "quantity": r[4],
+            "unit_price": float(r[5]) if r[5] else None,
+            "total_price": float(r[6]) if r[6] else None,
+        })
+    order["items"] = items
+    cur.close()
+    return order
+
+
+def update_order_status(tenant_conn, order_id: int, new_status: str) -> dict:
+    valid = {"pending", "confirmed", "packed", "shipped", "delivered", "cancelled", "rejected"}
+    if new_status not in valid:
+        raise ValueError(f"Invalid status. Allowed: {valid}")
+
+    cur = tenant_conn.cursor()
+    cur.execute(
+        "UPDATE marketplace_orders SET status = %s, updated_at = NOW() WHERE id = %s RETURNING external_order_id",
+        (new_status, order_id),
+    )
+    row = cur.fetchone()
+    tenant_conn.commit()
+    cur.close()
+    if not row:
+        raise ValueError("Order not found")
+    return {"ok": True, "status": new_status, "external_order_id": row[0]}
+
+
+# ═══════════════════════════════════════════════════════════════════════════
+# CONVERT ORDER → SALE
+# ═══════════════════════════════════════════════════════════════════════════
+
+def convert_order_to_sale(
+    tenant_conn, marketplace_order_id: int, employee_id: int = None, register_id: int = None
+) -> dict:
+    """Convert a marketplace order into a Nexus sale.
+
+    1. Look up marketplace_order + items
+    2. Map items to inventory_id (via marketplace_listings external_item_id)
+    3. Build sale_data compatible with process_sale()
+    4. Call process_sale()
+    5. Link sale back to marketplace_order
+    """
+    order = get_order_detail(tenant_conn, marketplace_order_id)
+    if order.get("nexus_sale_id"):
+        raise ValueError("Order already converted to sale")
+
+    cur = tenant_conn.cursor()
+
+    # Build sale items
+    sale_items = []
+    for it in order["items"]:
+        # Map external_item_id -> inventory_id via marketplace_listings
+        cur.execute(
+            "SELECT inventory_id FROM marketplace_listings WHERE external_item_id = %s LIMIT 1",
+            (it["external_item_id"],),
+        )
+        inv_row = cur.fetchone()
+        inventory_id = inv_row[0] if inv_row else None
+
+        if not inventory_id:
+            # Try to match by title fuzzy? Skip for now.
+            cur.close()
+            raise ValueError(f"Could not map item {it['external_item_id']} to inventory")
+
+        sale_items.append({
+            "inventory_id": inventory_id,
+            "quantity": it["quantity"],
+            "unit_price": float(it["unit_price"] or 0),
+            "discount_pct": 0,
+            "tax_rate": 0.16,
+        })
+
+    # Find or create generic "MercadoLibre" customer
+    cur.execute(
+        "SELECT id FROM customers WHERE name = 'MercadoLibre' LIMIT 1"
+    )
+    cust = cur.fetchone()
+    if cust:
+        customer_id = cust[0]
+    else:
+        cur.execute(
+            """
+            INSERT INTO customers (name, email, phone, is_active, price_tier)
+            VALUES ('MercadoLibre', 'marketplace@mercadolibre.com', '', true, 1)
+            RETURNING id
+            """
+        )
+        customer_id = cur.fetchone()[0]
+
+    # Build sale_data
+    sale_data = {
+        "items": sale_items,
+        "customer_id": customer_id,
+        "payment_method": "transferencia",
+        "sale_type": "cash",
+        "register_id": register_id,
+        "amount_paid": float(order["total_amount"] or 0),
+        "notes": f"MercadoLibre order #{order['external_order_id']}",
+    }
+
+    # We need to run process_sale inside the same connection.
+    # process_sale expects the caller to commit. We'll do that.
+    # However, process_sale uses flask.g for employee_id and branch_id.
+    # We need to set those or pass them explicitly.
+    # For now, we'll create the sale manually to avoid flask.g dependency.
+
+    sale = _create_sale_manual(tenant_conn, sale_data, employee_id=employee_id)
+
+    # Link order to sale
+    cur.execute(
+        "UPDATE marketplace_orders SET nexus_sale_id = %s, status = 'confirmed', updated_at = NOW() WHERE id = %s",
+        (sale["id"], marketplace_order_id),
+    )
+    tenant_conn.commit()
+    cur.close()
+    return {"sale_id": sale["id"], "marketplace_order_id": marketplace_order_id}
+
+
+def _create_sale_manual(tenant_conn, sale_data: dict, employee_id: int = None) -> dict:
+    """Create a sale record without relying on flask.g.
+
+    Simplified version of process_sale for background / external use.
+    """
+    from services.inventory_engine import record_sale as inventory_record_sale
+    from decimal import Decimal, ROUND_HALF_UP
+
+    cur = tenant_conn.cursor()
+    items = sale_data.get("items", [])
+    customer_id = sale_data.get("customer_id")
+    payment_method = sale_data.get("payment_method", "efectivo")
+    sale_type = sale_data.get("sale_type", "cash")
+    register_id = sale_data.get("register_id")
+    amount_paid = float(sale_data.get("amount_paid", 0))
+    notes = sale_data.get("notes")
+
+    if not items:
+        raise ValueError("No items in sale")
+
+    # Enrich items
+    inv_ids = [it["inventory_id"] for it in items]
+    cur.execute(
+        """
+        SELECT id, part_number, name, cost, price_1, tax_rate
+        FROM inventory WHERE id = ANY(%s) AND is_active = true
+        ORDER BY id FOR UPDATE
+        """,
+        (inv_ids,),
+    )
+    inv_map = {r[0]: r for r in cur.fetchall()}
+
+    enriched = []
+    for it in items:
+        inv_id = it["inventory_id"]
+        inv = inv_map.get(inv_id)
+        if not inv:
+            raise ValueError(f"Inventory item {inv_id} not found")
+        qty = int(it.get("quantity", 1))
+        unit_price = float(it.get("unit_price", inv[4] or 0))
+        discount_pct = float(it.get("discount_pct", 0))
+        tax_rate = float(it.get("tax_rate", inv[5] or 0.16))
+        unit_cost = float(inv[3]) if inv[3] else 0
+
+        enriched.append({
+            "inventory_id": inv_id,
+            "part_number": inv[1],
+            "name": inv[2],
+            "quantity": qty,
+            "unit_price": unit_price,
+            "unit_cost": unit_cost,
+            "discount_pct": discount_pct,
+            "tax_rate": tax_rate,
+        })
+
+    totals = calculate_totals(enriched)
+
+    # Insert sale
+    cur.execute(
+        """
+        INSERT INTO sales
+            (customer_id, employee_id, register_id, sale_type, payment_method,
+             subtotal, discount_total, tax_total, total, amount_paid, change_given,
+             status, notes, source, external_order_id)
+        VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, 'completed', %s, 'mercadolibre', %s)
+        RETURNING id
+        """,
+        (
+            customer_id,
+            employee_id,
+            register_id,
+            sale_type,
+            payment_method,
+            totals["subtotal"],
+            totals["discount_total"],
+            totals["tax_total"],
+            totals["total"],
+            amount_paid,
+            0,
+            notes,
+            sale_data.get("external_order_id"),
+        ),
+    )
+    sale_id = cur.fetchone()[0]
+
+    # Insert sale_items
+    for it in totals["items"]:
+        cur.execute(
+            """
+            INSERT INTO sale_items
+                (sale_id, inventory_id, part_number, name, quantity, unit_price,
+                 unit_cost, discount_pct, discount_amount, tax_rate, tax_amount, subtotal)
+            VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)
+            """,
+            (
+                sale_id,
+                it["inventory_id"],
+                it["part_number"],
+                it["name"],
+                it["quantity"],
+                it["unit_price"],
+                it.get("unit_cost", 0),
+                it.get("discount_pct", 0),
+                it.get("discount_amount", 0),
+                it.get("tax_rate", 0.16),
+                it.get("tax_amount", 0),
+                it["subtotal"],
+            ),
+        )
+
+    # Deduct inventory
+    for it in enriched:
+        inventory_record_sale(
+            tenant_conn, it["inventory_id"], it["quantity"], reference=f"ML sale {sale_id}"
+        )
+
+    tenant_conn.commit()
+    cur.close()
+    return {"id": sale_id, **totals}
diff --git a/pos/services/marketplace_service.py b/pos/services/marketplace_service.py
index 93e4bf6..465d4ea 100644
--- a/pos/services/marketplace_service.py
+++ b/pos/services/marketplace_service.py
@@ -136,15 +136,15 @@ def upload_inventory_csv(master_conn, bodega_id: int, csv_text: str) -> dict:
     Expected columns (case-insensitive, whitespace-tolerant):
         part_number, stock, price
     Optional:
-        min_order, warehouse_location, currency
+        name, min_order, warehouse_location, currency
 
     Resolution rules:
-      - part_number matches `parts.oem_part_number` exactly (case-sensitive).
-      - Parts not found in the master catalog are skipped and reported.
-      - Existing rows for (bodega_id, part_id, warehouse_location) are updated
-        via UPSERT; new rows are inserted.
+      - part_number matches `parts.oem_part_number` or `part_cross_references.cross_reference_number`.
+      - If matched → linked to catalog (part_id set, seller fields NULL).
+      - If NOT matched → created as seller listing (part_id NULL, seller_part_number set).
+      - Existing rows are updated via UPSERT on the composite unique key.
 
-    Returns a summary dict: {ok, inserted, updated, skipped, errors}
+    Returns a summary dict: {ok, inserted, updated, skipped, errors, oem_count, seller_count}
     """
     reader = csv.DictReader(io.StringIO(csv_text))
     # Normalize header names
@@ -166,9 +166,15 @@ def upload_inventory_csv(master_conn, bodega_id: int, csv_text: str) -> dict:
         cur.close()
         return {'ok': False, 'error': f'bodega_id {bodega_id} no existe'}
 
+    # Pre-load cross-reference map for fast lookup
+    cur.execute("SELECT cross_reference_number, oem_part_id FROM part_cross_references")
+    xref_map = {row[0].strip(): row[1] for row in cur.fetchall()}
+
     inserted = 0
     updated = 0
     skipped = 0
+    oem_count = 0
+    seller_count = 0
     errors = []
 
     for i, row in enumerate(reader, start=2):  # start=2 because row 1 is headers
@@ -176,6 +182,7 @@ def upload_inventory_csv(master_conn, bodega_id: int, csv_text: str) -> dict:
         part_number = norm.get('part_number', '')
         stock_str = norm.get('stock', '0')
         price_str = norm.get('price', '0')
+        part_name = norm.get('name', '')
 
         if not part_number:
             errors.append(f'Fila {i}: part_number vacio')
@@ -190,17 +197,20 @@ def upload_inventory_csv(master_conn, bodega_id: int, csv_text: str) -> dict:
             skipped += 1
             continue
 
-        # Resolve part_number → part_id
+        # Resolve part_number → part_id (OEM catalog or cross-reference)
+        part_id = None
         cur.execute(
             "SELECT id_part FROM parts WHERE oem_part_number = %s LIMIT 1",
             (part_number,)
         )
         row_part = cur.fetchone()
-        if not row_part:
-            errors.append(f'Fila {i}: part_number "{part_number}" no encontrado en catalogo')
-            skipped += 1
-            continue
-        part_id = row_part[0]
+        if row_part:
+            part_id = row_part[0]
+        else:
+            # Try cross-reference
+            xref_id = xref_map.get(part_number)
+            if xref_id:
+                part_id = xref_id
 
         # Resolve user_id from the bodega (use bodega_id as fallback if null)
         user_id = norm.get('user_id') or bodega_id  # backward compat
@@ -213,24 +223,48 @@ def upload_inventory_csv(master_conn, bodega_id: int, csv_text: str) -> dict:
         currency = (norm.get('currency') or 'MXN').upper()
         min_order = int(norm.get('min_order') or 1)
 
-        # UPSERT on (user_id, part_id, warehouse_location) — the existing
-        # unique constraint. Don't block if user_id FK fails.
+        # UPSERT on composite unique (bodega_id, part_id, seller_part_number, warehouse_location)
         try:
-            cur.execute("""
-                INSERT INTO warehouse_inventory
-                    (user_id, part_id, price, stock_quantity, min_order_quantity,
-                     warehouse_location, bodega_id, currency, updated_at)
-                VALUES (%s, %s, %s, %s, %s, %s, %s, %s, NOW())
-                ON CONFLICT (user_id, part_id, warehouse_location)
-                DO UPDATE SET
-                    price = EXCLUDED.price,
-                    stock_quantity = EXCLUDED.stock_quantity,
-                    min_order_quantity = EXCLUDED.min_order_quantity,
-                    bodega_id = EXCLUDED.bodega_id,
-                    currency = EXCLUDED.currency,
-                    updated_at = NOW()
-                RETURNING (xmax = 0) AS inserted
-            """, (user_id, part_id, price, stock, min_order, location, bodega_id, currency))
+            if part_id:
+                # OEM-matched listing
+                cur.execute("""
+                    INSERT INTO warehouse_inventory
+                        (user_id, part_id, seller_part_number, seller_part_name,
+                         price, stock_quantity, min_order_quantity,
+                         warehouse_location, bodega_id, currency, updated_at)
+                    VALUES (%s, %s, NULL, NULL, %s, %s, %s, %s, %s, %s, NOW())
+                    ON CONFLICT (bodega_id, part_id, warehouse_location) WHERE part_id IS NOT NULL
+                    DO UPDATE SET
+                        price = EXCLUDED.price,
+                        stock_quantity = EXCLUDED.stock_quantity,
+                        min_order_quantity = EXCLUDED.min_order_quantity,
+                        user_id = EXCLUDED.user_id,
+                        currency = EXCLUDED.currency,
+                        updated_at = NOW()
+                    RETURNING (xmax = 0) AS inserted
+                """, (user_id, part_id, price, stock, min_order, location, bodega_id, currency))
+                oem_count += 1
+            else:
+                # Seller listing (no catalog match)
+                cur.execute("""
+                    INSERT INTO warehouse_inventory
+                        (user_id, part_id, seller_part_number, seller_part_name,
+                         price, stock_quantity, min_order_quantity,
+                         warehouse_location, bodega_id, currency, updated_at)
+                    VALUES (%s, NULL, %s, %s, %s, %s, %s, %s, %s, %s, NOW())
+                    ON CONFLICT (bodega_id, seller_part_number, warehouse_location) WHERE part_id IS NULL
+                    DO UPDATE SET
+                        price = EXCLUDED.price,
+                        stock_quantity = EXCLUDED.stock_quantity,
+                        min_order_quantity = EXCLUDED.min_order_quantity,
+                        seller_part_name = EXCLUDED.seller_part_name,
+                        user_id = EXCLUDED.user_id,
+                        currency = EXCLUDED.currency,
+                        updated_at = NOW()
+                    RETURNING (xmax = 0) AS inserted
+                """, (user_id, part_number, part_name or part_number, price, stock, min_order, location, bodega_id, currency))
+                seller_count += 1
+
             was_insert = cur.fetchone()[0]
             if was_insert:
                 inserted += 1
@@ -250,6 +284,8 @@ def upload_inventory_csv(master_conn, bodega_id: int, csv_text: str) -> dict:
         'inserted': inserted,
         'updated': updated,
         'skipped': skipped,
+        'oem_count': oem_count,
+        'seller_count': seller_count,
         'errors': errors[:20],  # cap to avoid huge responses
         'total_errors': len(errors),
     }
@@ -262,70 +298,114 @@ def search_inventory(master_conn, *, query: str = None, brand: str = None,
     Returns parts WITH stock > 0 from VERIFIED bodegas only.
     Aggregates identical parts across bodegas so the buyer sees each part once
     with a list of bodegas that have it in stock.
+
+    Includes both OEM-matched parts (part_id IS NOT NULL) and seller listings
+    (part_id IS NULL) in a single unified result set.
     """
     cur = master_conn.cursor()
 
-    clauses = ["wi.stock_quantity > 0", "b.verified = TRUE"]
-    params = []
+    like = f'%{query}%' if query else None
+    city_lower = city.lower() if city else None
+    params_common = []
+
+    # Build city filter once
+    city_clause = ""
+    if city_lower:
+        city_clause = "AND LOWER(b.city) = LOWER(%s)"
+        params_common.append(city)
+
+    # ─── Part A: OEM-matched parts (JOIN with parts catalog) ──────────
+    clauses_oem = ["wi.stock_quantity > 0", "b.verified = TRUE", "wi.part_id IS NOT NULL"]
+    params_oem = []
 
     if query:
-        clauses.append("(p.oem_part_number ILIKE %s OR p.name_part ILIKE %s OR COALESCE(p.name_es, '') ILIKE %s)")
-        like = f'%{query}%'
-        params.extend([like, like, like])
+        clauses_oem.append("(p.oem_part_number ILIKE %s OR p.name_part ILIKE %s OR COALESCE(p.name_es, '') ILIKE %s)")
+        params_oem.extend([like, like, like])
 
     if brand:
-        # Search by vehicle brand via vehicle_parts → model_year_engine → models → brands.
-        # Too slow for this MVP. Instead, match on aftermarket manufacturer name.
-        clauses.append("""
+        clauses_oem.append("""
             EXISTS (
                 SELECT 1 FROM aftermarket_parts ap
                 JOIN manufacturers m ON m.id_manufacture = ap.manufacturer_id
                 WHERE ap.oem_part_id = p.id_part AND UPPER(m.name_manufacture) = UPPER(%s)
             )
         """)
-        params.append(brand)
+        params_oem.append(brand)
 
-    if city:
-        clauses.append("LOWER(b.city) = LOWER(%s)")
-        params.append(city)
+    where_oem = " AND ".join(clauses_oem)
 
-    where_sql = " AND ".join(clauses)
+    # ─── Part B: Seller listings (no parts catalog join) ──────────────
+    clauses_seller = ["wi.stock_quantity > 0", "b.verified = TRUE", "wi.part_id IS NULL"]
+    params_seller = []
 
-    cur.execute(f"""
-        SELECT
-            p.id_part,
-            p.oem_part_number,
-            COALESCE(p.name_es, p.name_part) AS name,
-            p.image_url,
-            COUNT(DISTINCT b.id_bodega) AS bodega_count,
-            MIN(wi.price) AS min_price,
-            MAX(wi.price) AS max_price,
-            SUM(wi.stock_quantity) AS total_stock,
-            -- List of bodega names that have this part in stock
-            ARRAY_AGG(DISTINCT b.name ORDER BY b.name) AS bodega_names
-        FROM warehouse_inventory wi
-        JOIN bodegas b ON b.id_bodega = wi.bodega_id
-        JOIN parts p ON p.id_part = wi.part_id
-        WHERE {where_sql}
-        GROUP BY p.id_part, p.oem_part_number, p.name_es, p.name_part, p.image_url
+    if query:
+        clauses_seller.append("(wi.seller_part_number ILIKE %s OR wi.seller_part_name ILIKE %s)")
+        params_seller.extend([like, like])
+
+    where_seller = " AND ".join(clauses_seller)
+
+    # Combined query with UNION ALL
+    sql = f"""
+        SELECT * FROM (
+            -- OEM-matched parts
+            SELECT
+                p.id_part AS id,
+                p.oem_part_number AS part_number,
+                COALESCE(p.name_es, p.name_part) AS name,
+                p.image_url,
+                COUNT(DISTINCT b.id_bodega) AS bodega_count,
+                MIN(wi.price) AS min_price,
+                MAX(wi.price) AS max_price,
+                SUM(wi.stock_quantity) AS total_stock,
+                ARRAY_AGG(DISTINCT b.name ORDER BY b.name) AS bodega_names,
+                'oem' AS listing_type
+            FROM warehouse_inventory wi
+            JOIN bodegas b ON b.id_bodega = wi.bodega_id
+            JOIN parts p ON p.id_part = wi.part_id
+            WHERE {where_oem} {city_clause}
+            GROUP BY p.id_part, p.oem_part_number, p.name_es, p.name_part, p.image_url
+
+            UNION ALL
+
+            -- Seller listings
+            SELECT
+                wi.id_inventory AS id,
+                wi.seller_part_number AS part_number,
+                wi.seller_part_name AS name,
+                NULL AS image_url,
+                COUNT(DISTINCT b.id_bodega) AS bodega_count,
+                MIN(wi.price) AS min_price,
+                MAX(wi.price) AS max_price,
+                SUM(wi.stock_quantity) AS total_stock,
+                ARRAY_AGG(DISTINCT b.name ORDER BY b.name) AS bodega_names,
+                'seller' AS listing_type
+            FROM warehouse_inventory wi
+            JOIN bodegas b ON b.id_bodega = wi.bodega_id
+            WHERE {where_seller} {city_clause}
+            GROUP BY wi.id_inventory, wi.seller_part_number, wi.seller_part_name
+        ) combined
         ORDER BY total_stock DESC
         LIMIT %s
-    """, params + [limit])
+    """
+
+    all_params = params_oem + params_common + params_seller + params_common + [limit]
+    cur.execute(sql, all_params)
 
     rows = cur.fetchall()
     cur.close()
 
     return [
         {
-            'id_part': r[0],
-            'oem_part_number': r[1],
+            'id': r[0],
+            'part_number': r[1],
             'name': r[2],
             'image_url': r[3],
             'bodega_count': r[4],
             'min_price': float(r[5]) if r[5] is not None else None,
             'max_price': float(r[6]) if r[6] is not None else None,
             'total_stock_hint': 'En stock' if (r[7] or 0) > 0 else 'Consultar',
-            'bodega_names': r[8],  # may expose; adjust if sensitive
+            'bodega_names': r[8],
+            'listing_type': r[9],
         }
         for r in rows
     ]
@@ -358,6 +438,33 @@ def get_bodegas_with_part(master_conn, part_id: int) -> list[dict]:
     ]
 
 
+def get_bodegas_with_listing(master_conn, wi_id: int) -> list[dict]:
+    """Return the list of verified bodegas that have a specific seller listing
+    (warehouse_inventory row with part_id IS NULL) in stock.
+    """
+    cur = master_conn.cursor()
+    cur.execute("""
+        SELECT b.id_bodega, b.name, b.city, b.whatsapp_phone,
+               wi.price, wi.stock_quantity, wi.min_order_quantity, wi.currency
+        FROM warehouse_inventory wi
+        JOIN bodegas b ON b.id_bodega = wi.bodega_id
+        WHERE wi.id_inventory = %s AND wi.stock_quantity > 0 AND b.verified = TRUE
+        ORDER BY wi.price ASC
+    """, (wi_id,))
+    rows = cur.fetchall()
+    cur.close()
+    return [
+        {
+            'id_bodega': r[0], 'name': r[1], 'city': r[2], 'whatsapp_phone': r[3],
+            'price': float(r[4]) if r[4] is not None else None,
+            'stock_hint': 'En stock',
+            'min_order': r[6] or 1,
+            'currency': r[7] or 'MXN',
+        }
+        for r in rows
+    ]
+
+
 # ═══════════════════════════════════════════════════════════════════════════
 # PURCHASE ORDERS
 # ═══════════════════════════════════════════════════════════════════════════
@@ -397,32 +504,60 @@ def create_po_draft(master_conn, *, buyer_tenant_id: int, buyer_user_id: int,
     # Insert items
     total = 0.0
     for item in items:
-        part_id = int(item['part_id'])
+        part_id = item.get('part_id')
+        wi_id = item.get('wi_id')
         quantity = int(item['quantity'])
         if quantity < 1:
             continue
 
-        # Lookup part info + price
-        cur.execute("""
-            SELECT p.oem_part_number, COALESCE(p.name_es, p.name_part), wi.price
-            FROM parts p
-            LEFT JOIN warehouse_inventory wi
-                ON wi.part_id = p.id_part AND wi.bodega_id = %s
-            WHERE p.id_part = %s LIMIT 1
-        """, (bodega_id, part_id))
-        r = cur.fetchone()
-        if not r:
-            continue
-        oem, name, db_price = r
-        unit_price = float(item.get('unit_price') or db_price or 0)
-        subtotal = round(unit_price * quantity, 2)
-        total += subtotal
+        if part_id:
+            # OEM-matched part
+            part_id = int(part_id)
+            cur.execute("""
+                SELECT p.oem_part_number, COALESCE(p.name_es, p.name_part), wi.price
+                FROM parts p
+                LEFT JOIN warehouse_inventory wi
+                    ON wi.part_id = p.id_part AND wi.bodega_id = %s
+                WHERE p.id_part = %s LIMIT 1
+            """, (bodega_id, part_id))
+            r = cur.fetchone()
+            if not r:
+                continue
+            oem, name, db_price = r
+            unit_price = float(item.get('unit_price') or db_price or 0)
+            subtotal = round(unit_price * quantity, 2)
+            total += subtotal
 
-        cur.execute("""
-            INSERT INTO purchase_order_items
-                (po_id, part_id, oem_part_number, part_name, quantity, unit_price, subtotal, notes)
-            VALUES (%s, %s, %s, %s, %s, %s, %s, %s)
-        """, (po_id, part_id, oem, name, quantity, unit_price, subtotal, item.get('notes')))
+            cur.execute("""
+                INSERT INTO purchase_order_items
+                    (po_id, part_id, oem_part_number, part_name, quantity, unit_price, subtotal, notes, is_seller_listing)
+                VALUES (%s, %s, %s, %s, %s, %s, %s, %s, FALSE)
+            """, (po_id, part_id, oem, name, quantity, unit_price, subtotal, item.get('notes')))
+
+        elif wi_id:
+            # Seller listing (no catalog match)
+            wi_id = int(wi_id)
+            cur.execute("""
+                SELECT seller_part_number, seller_part_name, price
+                FROM warehouse_inventory
+                WHERE id_inventory = %s AND bodega_id = %s LIMIT 1
+            """, (wi_id, bodega_id))
+            r = cur.fetchone()
+            if not r:
+                continue
+            seller_pn, seller_name, db_price = r
+            unit_price = float(item.get('unit_price') or db_price or 0)
+            subtotal = round(unit_price * quantity, 2)
+            total += subtotal
+
+            cur.execute("""
+                INSERT INTO purchase_order_items
+                    (po_id, part_id, oem_part_number, part_name, quantity, unit_price, subtotal, notes, is_seller_listing)
+                VALUES (%s, NULL, %s, %s, %s, %s, %s, %s, TRUE)
+            """, (po_id, seller_pn, seller_name or seller_pn, quantity, unit_price, subtotal, item.get('notes')))
+
+        else:
+            continue
 
     # Update header total
     cur.execute("UPDATE purchase_orders SET total_amount = %s WHERE id_po = %s",
diff --git a/pos/services/meli_service.py b/pos/services/meli_service.py
new file mode 100644
index 0000000..31043e8
--- /dev/null
+++ b/pos/services/meli_service.py
@@ -0,0 +1,233 @@
+"""MercadoLibre API client with OAuth2 auto-refresh.
+
+Endpoints used:
+  - GET  /users/me
+  - POST /items
+  - PUT  /items/{id}
+  - GET  /items/{id}
+  - GET  /orders/search
+  - GET  /orders/{id}
+  - POST /shipments/{id}/dispatch
+  - POST /oauth/token
+
+References:
+  https://developers.mercadolibre.com.ar/es_ar/api-docs-es
+"""
+
+import time
+import requests
+from typing import Optional
+
+BASE_URL = "https://api.mercadolibre.com"
+AUTH_URL = "https://api.mercadolibre.com/oauth/token"
+
+
+class MeliError(Exception):
+    def __init__(self, message, status_code=None, response_body=None):
+        super().__init__(message)
+        self.status_code = status_code
+        self.response_body = response_body
+
+
+class MeliAuthError(MeliError):
+    pass
+
+
+class MeliService:
+    def __init__(
+        self,
+        access_token: str,
+        refresh_token: Optional[str] = None,
+        client_id: Optional[str] = None,
+        client_secret: Optional[str] = None,
+    ):
+        self.access_token = access_token
+        self.refresh_token = refresh_token
+        self.client_id = client_id
+        self.client_secret = client_secret
+        self._session = requests.Session()
+        self._session.headers.update({"Authorization": f"Bearer {access_token}"})
+
+    # ─── Low-level request ───────────────────────────────────────────────
+
+    def _request(
+        self,
+        method: str,
+        path: str,
+        params: Optional[dict] = None,
+        json_payload: Optional[dict] = None,
+        retry_on_401: bool = True,
+    ) -> dict:
+        url = f"{BASE_URL}{path}"
+        resp = self._session.request(
+            method, url, params=params, json=json_payload, timeout=30
+        )
+
+        if resp.status_code == 401 and retry_on_401 and self.refresh_token:
+            self._refresh_token()
+            # Retry once with new token
+            self._session.headers.update(
+                {"Authorization": f"Bearer {self.access_token}"}
+            )
+            resp = self._session.request(
+                method, url, params=params, json=json_payload, timeout=30
+            )
+
+        if resp.status_code == 401:
+            raise MeliAuthError(
+                "Unauthorized. Token may be expired or invalid.",
+                status_code=401,
+                response_body=resp.text,
+            )
+
+        if not resp.ok:
+            raise MeliError(
+                f"Meli API error {resp.status_code}: {resp.text}",
+                status_code=resp.status_code,
+                response_body=resp.text,
+            )
+
+        # Some endpoints return 204 No Content
+        if resp.status_code == 204:
+            return {}
+        try:
+            return resp.json()
+        except Exception:
+            return {"raw": resp.text}
+
+    def _refresh_token(self) -> dict:
+        if not self.client_id or not self.client_secret or not self.refresh_token:
+            raise MeliAuthError("Missing credentials for token refresh")
+        payload = {
+            "grant_type": "refresh_token",
+            "client_id": self.client_id,
+            "client_secret": self.client_secret,
+            "refresh_token": self.refresh_token,
+        }
+        resp = requests.post(AUTH_URL, data=payload, timeout=30)
+        if not resp.ok:
+            raise MeliAuthError(
+                f"Token refresh failed: {resp.status_code} {resp.text}",
+                status_code=resp.status_code,
+                response_body=resp.text,
+            )
+        data = resp.json()
+        self.access_token = data["access_token"]
+        if "refresh_token" in data:
+            self.refresh_token = data["refresh_token"]
+        return data
+
+    # ─── Auth / User ─────────────────────────────────────────────────────
+
+    def get_user(self) -> dict:
+        return self._request("GET", "/users/me")
+
+    @staticmethod
+    def exchange_code(
+        code: str, client_id: str, client_secret: str, redirect_uri: str
+    ) -> dict:
+        """Exchange authorization code for tokens."""
+        payload = {
+            "grant_type": "authorization_code",
+            "client_id": client_id,
+            "client_secret": client_secret,
+            "code": code,
+            "redirect_uri": redirect_uri,
+        }
+        resp = requests.post(AUTH_URL, data=payload, timeout=30)
+        if not resp.ok:
+            raise MeliAuthError(
+                f"Code exchange failed: {resp.status_code} {resp.text}",
+                status_code=resp.status_code,
+                response_body=resp.text,
+            )
+        return resp.json()
+
+    # ─── Items (listings) ────────────────────────────────────────────────
+
+    def create_item(self, payload: dict) -> dict:
+        return self._request("POST", "/items", json_payload=payload)
+
+    def update_item(self, item_id: str, payload: dict) -> dict:
+        return self._request("PUT", f"/items/{item_id}", json_payload=payload)
+
+    def get_item(self, item_id: str) -> dict:
+        return self._request("GET", f"/items/{item_id}")
+
+    def pause_item(self, item_id: str) -> dict:
+        return self.update_item(item_id, {"status": "paused"})
+
+    def activate_item(self, item_id: str) -> dict:
+        return self.update_item(item_id, {"status": "active"})
+
+    def close_item(self, item_id: str) -> dict:
+        return self.update_item(item_id, {"status": "closed"})
+
+    # ─── Categories ──────────────────────────────────────────────────────
+
+    def get_category(self, category_id: str) -> dict:
+        return self._request("GET", f"/categories/{category_id}")
+
+    def search_categories(self, site_id: str, query: str) -> dict:
+        # ML does not have a direct category search; we use the predictor
+        return self._request(
+            "GET",
+            f"/sites/{site_id}/domain_discovery/search",
+            params={"q": query},
+        )
+
+    def get_category_attributes(self, category_id: str) -> list:
+        return self._request("GET", f"/categories/{category_id}/attributes")
+
+    # ─── Orders ──────────────────────────────────────────────────────────
+
+    def get_orders(
+        self,
+        seller_id: str,
+        status: Optional[str] = None,
+        date_from: Optional[str] = None,
+        limit: int = 50,
+        offset: int = 0,
+    ) -> dict:
+        params = {"seller": seller_id, "limit": limit, "offset": offset}
+        if status:
+            params["order.status"] = status
+        if date_from:
+            params["order.date_created.from"] = date_from
+        return self._request("GET", "/orders/search", params=params)
+
+    def get_order(self, order_id: str) -> dict:
+        return self._request("GET", f"/orders/{order_id}")
+
+    # ─── Shipments ───────────────────────────────────────────────────────
+
+    def get_shipment(self, shipment_id: str) -> dict:
+        return self._request("GET", f"/shipments/{shipment_id}")
+
+    def mark_ready_to_ship(self, shipment_id: str) -> dict:
+        return self._request(
+            "POST",
+            f"/shipments/{shipment_id}/dispatch",
+            json_payload={},
+        )
+
+    # ─── Notifications / Webhooks validation ─────────────────────────────
+
+    @staticmethod
+    def validate_webhook_signature(
+        secret: str, data: bytes, signature_header: str
+    ) -> bool:
+        """Validate MercadoLibre webhook signature.
+
+        ML sends: X-Signature: sha256=<hex_hmac>
+        """
+        import hmac
+        import hashlib
+
+        if not signature_header or "=" not in signature_header:
+            return False
+        _, expected_hex = signature_header.split("=", 1)
+        computed = hmac.new(
+            secret.encode(), data, hashlib.sha256
+        ).hexdigest()
+        return hmac.compare_digest(computed, expected_hex)
diff --git a/pos/services/part_kits.py b/pos/services/part_kits.py
new file mode 100644
index 0000000..57a9e1e
--- /dev/null
+++ b/pos/services/part_kits.py
@@ -0,0 +1,186 @@
+"""
+Smart part kits — automatic cross-sell recommendations.
+
+When a customer adds a part to their quotation, suggest related
+parts that are typically needed together for a complete job.
+"""
+
+# Spanish keywords in part name → related parts to suggest (in Spanish)
+# These appear after a successful "cotizar" command.
+KIT_SUGGESTIONS = {
+    "balata": ["disco de freno", "líquido de frenos", "balero de rueda"],
+    "disco de freno": ["balata", "líquido de frenos"],
+    "alternador": ["banda serpentina", "batería", "regulador de alternador"],
+    "batería": ["alternador", "cable de bujía"],
+    "marcha": ["batería", "solenoide de marcha"],
+    "bujía": ["bobina de encendido", "filtro de aire", "filtro de gasolina"],
+    "bobina": ["bujía", "cable de bujía"],
+    "bomba de agua": ["termostato", "refrigerante", "manguera de radiador"],
+    "radiador": ["manguera de radiador", "termostato", "tapón de radiador"],
+    "termostato": ["refrigerante", "manguera de radiador"],
+    "amortiguador": ["base de amortiguador", "goma de suspensión", "rótula"],
+    "rótula": ["terminal de dirección", "brazo de suspensión", "bujes"],
+    "terminal": ["rótula", "brazo de suspensión"],
+    "filtro de aceite": ["filtro de aire", "filtro de gasolina", "filtro de habitáculo"],
+    "filtro de aire": ["filtro de aceite", "filtro de gasolina", "bujía"],
+    "filtro de gasolina": ["filtro de aire", "filtro de aceite", "inyector"],
+    "clutch": ["collarín", "disco de clutch", "plato de presión"],
+    "collarín": ["clutch", "disco de clutch"],
+    "banda de distribución": ["bomba de agua", "tensor", "polea loca"],
+    "banda serpentina": ["tensor de banda", "polea loca"],
+    "foco": ["foco trasero", "cuarto"],
+    "faro": ["foco trasero", "cuarto"],
+    "aceite": ["filtro de aceite", "filtro de aire"],
+}
+
+
+def get_kit_suggestions(part_name: str) -> list:
+    """Return related part names for a given part (Spanish)."""
+    if not part_name:
+        return []
+    name_lower = part_name.lower()
+    for keyword, related in KIT_SUGGESTIONS.items():
+        if keyword in name_lower:
+            return related
+    return []
+
+
+def build_kit_text(part_name: str) -> str:
+    """Build a WhatsApp-friendly kit suggestion text.
+
+    Returns empty string if no kit is found.
+    """
+    suggestions = get_kit_suggestions(part_name)
+    if not suggestions:
+        return ""
+    items = "\n".join(f"  • {s.title()}" for s in suggestions[:3])
+    return (
+        "\n\n🔧 *¿Ya que estás en eso, checa si también necesitas:*\n"
+        + items
+        + '\n\n_Escribe la parte que te interese y la agregamos._'
+    )
+
+
+# ── Urgency detection ────────────────────────────────────────────────
+URGENCY_KEYWORDS = [
+    "urgente", "urgencia", "emergencia", "ya", "ahora", "hoy",
+    "lo necesito", "se me paro", "no arranca", "no jala",
+    "rapido", "apúrate", "apurate", "prisa", "de volada",
+    "para hoy", "para ahora", "lo mas pronto", "lo más pronto",
+    "inmediato", "express", "exprés",
+]
+
+
+def is_urgent(text: str) -> bool:
+    """Detect if the customer message signals urgency."""
+    if not text:
+        return False
+    t = text.lower()
+    return any(kw in t for kw in URGENCY_KEYWORDS)
+
+
+def urgency_note() -> str:
+    return (
+        "\n\n⚡ NOTA DE URGENCIA: El cliente necesita la pieza lo antes posible. "
+        "Prioriza stock local y ofrece entrega express (2-4 horas) o recolección inmediata en tienda. "
+        "Si no hay stock exacto, ofrece alternativa disponible inmediatamente."
+    )
+
+
+# ── Abandoned quotation follow-up ────────────────────────────────────
+FOLLOW_UP_MINUTES = 15
+
+
+def should_send_followup(phone: str, tenant_conn) -> str:
+    """Check if we should send a follow-up message for an abandoned quotation.
+
+    Returns the follow-up text if yes, empty string if no.
+    """
+    if not tenant_conn or not phone:
+        return ""
+    try:
+        cur = tenant_conn.cursor()
+        # 1. Check if there's an active quotation for this phone
+        cur.execute("""
+            SELECT id FROM quotations
+            WHERE notes LIKE %s AND status = 'active'
+            ORDER BY created_at DESC LIMIT 1
+        """, (f'%WA:{phone}%',))
+        row = cur.fetchone()
+        if not row:
+            cur.close()
+            return ""
+
+        # 2. Check last bot message mentioning "cotización" or "cotizar"
+        cur.execute("""
+            SELECT created_at, message_text
+            FROM whatsapp_messages
+            WHERE phone = %s AND direction = 'outgoing'
+              AND (message_text ILIKE '%cotización%' OR message_text ILIKE '%cotizar%')
+            ORDER BY created_at DESC LIMIT 1
+        """, (phone,))
+        last_quote_msg = cur.fetchone()
+        cur.close()
+
+        if not last_quote_msg:
+            return ""
+
+        from datetime import datetime, timezone
+        last_time = last_quote_msg[0]
+        now = datetime.now(timezone.utc)
+        if last_time.tzinfo is None:
+            last_time = last_time.replace(tzinfo=timezone.utc)
+
+        minutes_since = (now - last_time).total_seconds() / 60
+        if minutes_since >= FOLLOW_UP_MINUTES:
+            return (
+                "👋 *¿Todo bien?*\n\n"
+                "Veo que estabas armando tu cotización. ¿Te falta algo más o quieres que te la envíe ahora?\n\n"
+                "_Escribe *enviar cotización* para ver el total, o dime si necesitas otra parte._"
+            )
+    except Exception as e:
+        print(f"[WA-AI] Follow-up check failed: {e}")
+    return ""
+
+
+# ── Customer purchase history awareness ──────────────────────────────
+def get_purchase_history(phone: str, tenant_conn, limit: int = 3) -> str:
+    """Build a short text summary of recent confirmed quotations for this customer.
+
+    Returns empty string if no history.
+    """
+    if not tenant_conn or not phone:
+        return ""
+    try:
+        cur = tenant_conn.cursor()
+        cur.execute("""
+            SELECT q.id, q.created_at, q.total,
+                   ARRAY_AGG(qi.name ORDER BY qi.name) AS items
+            FROM quotations q
+            JOIN quotation_items qi ON qi.quotation_id = q.id
+            WHERE q.notes LIKE %s AND q.status = 'converted'
+            GROUP BY q.id, q.created_at, q.total
+            ORDER BY q.created_at DESC
+            LIMIT %s
+        """, (f'%WA:{phone}%', limit))
+        rows = cur.fetchall()
+        cur.close()
+
+        if not rows:
+            return ""
+
+        from datetime import datetime, timezone
+        now = datetime.now(timezone.utc)
+        parts = []
+        for qid, created, total, items in rows:
+            if created.tzinfo is None:
+                created = created.replace(tzinfo=timezone.utc)
+            months_ago = (now - created).days // 30
+            time_str = f"hace {months_ago} meses" if months_ago > 0 else "recientemente"
+            item_list = ", ".join(items[:3])
+            parts.append(f"- {time_str}: {item_list} (total ${float(total):,.2f})")
+
+        return "HISTORIAL DE COMPRAS DEL CLIENTE:\n" + "\n".join(parts)
+    except Exception as e:
+        print(f"[WA-AI] Purchase history failed: {e}")
+    return ""
diff --git a/pos/services/quote_image.py b/pos/services/quote_image.py
new file mode 100644
index 0000000..5f2aabb
--- /dev/null
+++ b/pos/services/quote_image.py
@@ -0,0 +1,127 @@
+import io
+import base64
+from PIL import Image, ImageDraw, ImageFont
+
+def generate_quote_image(quote_items, totals, tenant_name="Autopartes", logo_text="NEXUS"):
+    """
+    Generate a visually appealing quote image.
+    
+    quote_items: list of dicts with keys: name, sku, qty, price, total
+    totals: dict with keys: subtotal, tax, total
+    Returns: base64 encoded PNG string
+    """
+    # Dimensions
+    WIDTH = 800
+    HEADER_H = 120
+    FOOTER_H = 100
+    ITEM_H = 60
+    PADDING = 30
+    
+    total_height = HEADER_H + len(quote_items) * ITEM_H + FOOTER_H + PADDING * 3
+    
+    # Colors
+    BG_COLOR = (250, 250, 252)
+    PRIMARY = (0, 82, 155)       # Dark blue
+    ACCENT = (230, 57, 70)       # Red accent
+    TEXT_DARK = (30, 30, 30)
+    TEXT_MED = (80, 80, 80)
+    TEXT_LIGHT = (150, 150, 150)
+    WHITE = (255, 255, 255)
+    ROW_ALT = (245, 247, 250)
+    
+    img = Image.new('RGB', (WIDTH, total_height), BG_COLOR)
+    draw = ImageDraw.Draw(img)
+    
+    # Try to load fonts, fallback to default
+    try:
+        font_title = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf", 32)
+        font_sub = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", 18)
+        font_item = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", 20)
+        font_bold = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf", 22)
+        font_small = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", 14)
+    except Exception:
+        font_title = ImageFont.load_default()
+        font_sub = font_title
+        font_item = font_title
+        font_bold = font_title
+        font_small = font_title
+    
+    # --- Header ---
+    draw.rectangle([0, 0, WIDTH, HEADER_H], fill=PRIMARY)
+    
+    # Logo text
+    draw.text((PADDING, 25), logo_text, font=font_title, fill=WHITE)
+    draw.text((PADDING, 70), tenant_name, font=font_sub, fill=(200, 210, 230))
+    
+    # Date and Quote label
+    from datetime import datetime
+    date_str = datetime.now().strftime("%d/%m/%Y %H:%M")
+    draw.text((WIDTH - PADDING - 200, 30), "COTIZACIÓN", font=font_title, fill=WHITE)
+    draw.text((WIDTH - PADDING - 200, 75), date_str, font=font_sub, fill=(200, 210, 230))
+    
+    # --- Items Header ---
+    y = HEADER_H + PADDING
+    draw.rectangle([PADDING, y, WIDTH - PADDING, y + ITEM_H], fill=(230, 235, 240))
+    draw.text((PADDING + 10, y + 18), "PRODUCTO", font=font_bold, fill=TEXT_DARK)
+    draw.text((WIDTH - PADDING - 220, y + 18), "CANT.", font=font_bold, fill=TEXT_DARK)
+    draw.text((WIDTH - PADDING - 130, y + 18), "P.UNIT", font=font_bold, fill=TEXT_DARK)
+    draw.text((WIDTH - PADDING - 50, y + 18), "TOTAL", font=font_bold, fill=TEXT_DARK)
+    y += ITEM_H
+    
+    # --- Items ---
+    for idx, item in enumerate(quote_items):
+        row_y = y + idx * ITEM_H
+        bg = ROW_ALT if idx % 2 == 0 else WHITE
+        draw.rectangle([PADDING, row_y, WIDTH - PADDING, row_y + ITEM_H], fill=bg)
+        
+        name = item.get('name', 'Producto')
+        sku = item.get('sku', '')
+        qty = str(item.get('qty', 1))
+        price = f"${item.get('price', 0):,.2f}"
+        total = f"${item.get('total', 0):,.2f}"
+        
+        # Truncate name if too long
+        name_display = name
+        if len(name_display) > 35:
+            name_display = name_display[:32] + "..."
+        
+        draw.text((PADDING + 10, row_y + 8), name_display, font=font_item, fill=TEXT_DARK)
+        draw.text((PADDING + 10, row_y + 32), f"SKU: {sku}", font=font_small, fill=TEXT_MED)
+        
+        draw.text((WIDTH - PADDING - 220, row_y + 18), qty, font=font_item, fill=TEXT_DARK)
+        draw.text((WIDTH - PADDING - 130, row_y + 18), price, font=font_item, fill=TEXT_DARK)
+        draw.text((WIDTH - PADDING - 50, row_y + 18), total, font=font_item, fill=TEXT_DARK)
+    
+    y += len(quote_items) * ITEM_H + PADDING
+    
+    # --- Totals ---
+    draw.line([(PADDING, y), (WIDTH - PADDING, y)], fill=(200, 200, 200), width=2)
+    y += 20
+    
+    subtotal = totals.get('subtotal', 0)
+    tax = totals.get('tax', 0)
+    total = totals.get('total', 0)
+    
+    draw.text((WIDTH - PADDING - 300, y), "Subtotal:", font=font_sub, fill=TEXT_MED)
+    draw.text((WIDTH - PADDING - 50, y), f"${subtotal:,.2f}", font=font_sub, fill=TEXT_DARK)
+    y += 30
+    
+    draw.text((WIDTH - PADDING - 300, y), "IVA (16%):", font=font_sub, fill=TEXT_MED)
+    draw.text((WIDTH - PADDING - 50, y), f"${tax:,.2f}", font=font_sub, fill=TEXT_DARK)
+    y += 35
+    
+    draw.text((WIDTH - PADDING - 300, y), "TOTAL:", font=font_bold, fill=ACCENT)
+    draw.text((WIDTH - PADDING - 50, y), f"${total:,.2f}", font=font_bold, fill=ACCENT)
+    y += 50
+    
+    # --- Footer ---
+    draw.rectangle([0, total_height - FOOTER_H, WIDTH, total_height], fill=PRIMARY)
+    footer_text = "Validez: 5 días hábiles | Envíos a todo México | Contacto: ventas@nexusautoparts.com"
+    draw.text((PADDING, total_height - FOOTER_H + 35), footer_text, font=font_small, fill=(200, 210, 230))
+    
+    # Convert to base64
+    buffer = io.BytesIO()
+    img.save(buffer, format='PNG')
+    buffer.seek(0)
+    return base64.b64encode(buffer.read()).decode('utf-8')
+
diff --git a/pos/services/wa_quotation.py b/pos/services/wa_quotation.py
index 70a0437..e4f3f34 100644
--- a/pos/services/wa_quotation.py
+++ b/pos/services/wa_quotation.py
@@ -135,41 +135,34 @@ def _ensure_sessions_table(tenant_conn):
     cur.close()
 
 
-def set_last_shown_part(phone, part_info):
+def set_last_shown_part(tenant_conn, phone, part_info):
     """Store the last part shown to this phone number.
 
     part_info: dict with keys inventory_id, part_number, name, brand,
     price, stock, unit
     """
-    # In-memory fallback for when tenant_conn is not available
-    from tenant_db import get_tenant_conn
     try:
-        conn = get_tenant_conn(11)
-        _ensure_sessions_table(conn)
-        cur = conn.cursor()
+        _ensure_sessions_table(tenant_conn)
+        cur = tenant_conn.cursor()
         import json
         cur.execute("""
             INSERT INTO whatsapp_sessions (phone, last_shown, updated_at)
             VALUES (%s, %s, NOW())
             ON CONFLICT (phone) DO UPDATE SET last_shown = EXCLUDED.last_shown, updated_at = NOW()
         """, (phone, json.dumps(part_info)))
-        conn.commit()
+        tenant_conn.commit()
         cur.close()
-        conn.close()
     except Exception as e:
         print(f"[WA-SESSION] Failed to persist last_shown for {phone}: {e}")
 
 
-def get_last_shown_part(phone):
-    from tenant_db import get_tenant_conn
+def get_last_shown_part(tenant_conn, phone):
     try:
-        conn = get_tenant_conn(11)
-        _ensure_sessions_table(conn)
-        cur = conn.cursor()
+        _ensure_sessions_table(tenant_conn)
+        cur = tenant_conn.cursor()
         cur.execute("SELECT last_shown FROM whatsapp_sessions WHERE phone = %s", (phone,))
         row = cur.fetchone()
         cur.close()
-        conn.close()
         if row and row[0]:
             return row[0]
     except Exception as e:
@@ -177,54 +170,45 @@ def get_last_shown_part(phone):
     return None
 
 
-def clear_last_shown(phone):
-    from tenant_db import get_tenant_conn
+def clear_last_shown(tenant_conn, phone):
     try:
-        conn = get_tenant_conn(11)
-        _ensure_sessions_table(conn)
-        cur = conn.cursor()
+        _ensure_sessions_table(tenant_conn)
+        cur = tenant_conn.cursor()
         cur.execute("DELETE FROM whatsapp_sessions WHERE phone = %s", (phone,))
-        conn.commit()
+        tenant_conn.commit()
         cur.close()
-        conn.close()
     except Exception as e:
         print(f"[WA-SESSION] Failed to clear last_shown for {phone}: {e}")
 
 
-def set_vehicle(phone, vehicle):
+def set_vehicle(tenant_conn, phone, vehicle):
     """Store the detected vehicle for this phone number.
 
     vehicle: dict with keys brand, model, year
     """
-    from tenant_db import get_tenant_conn
     try:
-        conn = get_tenant_conn(11)
-        _ensure_sessions_table(conn)
-        cur = conn.cursor()
+        _ensure_sessions_table(tenant_conn)
+        cur = tenant_conn.cursor()
         import json
         cur.execute("""
             INSERT INTO whatsapp_sessions (phone, vehicle, updated_at)
             VALUES (%s, %s, NOW())
             ON CONFLICT (phone) DO UPDATE SET vehicle = EXCLUDED.vehicle, updated_at = NOW()
         """, (phone, json.dumps(vehicle)))
-        conn.commit()
+        tenant_conn.commit()
         cur.close()
-        conn.close()
     except Exception as e:
         print(f"[WA-SESSION] Failed to persist vehicle for {phone}: {e}")
 
 
-def get_vehicle(phone):
+def get_vehicle(tenant_conn, phone):
     """Retrieve the stored vehicle for this phone number."""
-    from tenant_db import get_tenant_conn
     try:
-        conn = get_tenant_conn(11)
-        _ensure_sessions_table(conn)
-        cur = conn.cursor()
+        _ensure_sessions_table(tenant_conn)
+        cur = tenant_conn.cursor()
         cur.execute("SELECT vehicle FROM whatsapp_sessions WHERE phone = %s", (phone,))
         row = cur.fetchone()
         cur.close()
-        conn.close()
         if row and row[0]:
             return row[0]
     except Exception as e:
@@ -232,17 +216,14 @@ def get_vehicle(phone):
     return None
 
 
-def clear_session(phone):
+def clear_session(tenant_conn, phone):
     """Clear all session data (last_shown + vehicle) for this phone."""
-    from tenant_db import get_tenant_conn
     try:
-        conn = get_tenant_conn(11)
-        _ensure_sessions_table(conn)
-        cur = conn.cursor()
+        _ensure_sessions_table(tenant_conn)
+        cur = tenant_conn.cursor()
         cur.execute("DELETE FROM whatsapp_sessions WHERE phone = %s", (phone,))
-        conn.commit()
+        tenant_conn.commit()
         cur.close()
-        conn.close()
     except Exception as e:
         print(f"[WA-SESSION] Failed to clear session for {phone}: {e}")
 
diff --git a/pos/services/whatsapp_service.py b/pos/services/whatsapp_service.py
index bb9e151..d9bbba2 100644
--- a/pos/services/whatsapp_service.py
+++ b/pos/services/whatsapp_service.py
@@ -105,6 +105,7 @@ def process_incoming(webhook_data):
     #  - For 'text' messages → conversation or extendedTextMessage
     #  - For 'image'/'video' → the caption (may be empty)
     #  - For 'audio' → empty (filled in later by Whisper transcription)
+    #  - For 'location' → synthetic text with coordinates
     if media_kind == 'text':
         text = (
             message.get('conversation', '')
@@ -114,6 +115,10 @@ def process_incoming(webhook_data):
     else:
         text = media_caption
 
+    # Location fields (from bridge classification)
+    latitude = data.get('latitude')
+    longitude = data.get('longitude')
+
     return {
         'phone': phone,
         'jid': remote_jid,
@@ -125,4 +130,20 @@ def process_incoming(webhook_data):
         'media_mimetype': media_mimetype,
         'is_voice_note': is_voice_note,
         'push_name': push_name,
+        'latitude': latitude,
+        'longitude': longitude,
     }
+
+
+def send_image(phone, caption, base64_image, bridge_url=None):
+    """Send an image message via the Baileys bridge."""
+    url = _get_url(bridge_url)
+    try:
+        return requests.post(
+            f'{url}/send-image',
+            headers=HEADERS,
+            json={'phone': phone, 'caption': caption, 'base64': base64_image},
+            timeout=15
+        ).json()
+    except Exception as e:
+        return {'error': str(e)}
diff --git a/pos/static/css/inventory.css b/pos/static/css/inventory.css
index f36c4ed..f3016b6 100644
--- a/pos/static/css/inventory.css
+++ b/pos/static/css/inventory.css
@@ -732,6 +732,20 @@
       font-size: var(--text-caption);
     }
 
+    .btn--meli {
+      background: #FFE600;
+      color: #2D3277;
+      border-color: transparent;
+      font-weight: 700;
+    }
+    .btn--meli:hover {
+      background: #e6cf00;
+      color: #1a1f5c;
+    }
+    .btn--meli svg {
+      stroke: currentColor;
+    }
+
     /* =========================================================================
        DATA TABLE
        ========================================================================= */
@@ -1261,7 +1275,7 @@
     .inv-field label {
       font-size: var(--text-caption);
       font-weight: var(--font-weight-semibold);
-      color: var(--color-text-muted);
+      color: var(--color-text-secondary);
       letter-spacing: var(--tracking-wide);
       text-transform: uppercase;
     }
@@ -1282,6 +1296,23 @@
       box-shadow: 0 0 0 2px var(--color-primary-muted);
     }
 
+    .inv-field select {
+      padding: var(--space-2) var(--space-3);
+      background: var(--color-surface-1);
+      border: 1px solid var(--color-border);
+      border-radius: var(--radius-md);
+      color: var(--color-text-primary);
+      font-family: var(--font-body);
+      font-size: var(--text-body-sm);
+      width: 100%;
+    }
+
+    .inv-field select:focus {
+      outline: none;
+      border-color: var(--color-primary);
+      box-shadow: 0 0 0 2px var(--color-primary-muted);
+    }
+
     .count-row {
       display: flex;
       gap: var(--space-2);
@@ -1301,3 +1332,48 @@
 
     /* History table inside modal */
     .inv-modal .data-table { width: 100%; }
+
+    /* ─── MercadoLibre Category Autocomplete ─────────────────────────────── */
+    .meli-cat-dropdown {
+      position: absolute;
+      top: 100%;
+      left: 0;
+      right: 0;
+      z-index: 200;
+      background: var(--color-surface-1);
+      border: 1px solid var(--color-border);
+      border-radius: var(--radius-md);
+      box-shadow: var(--shadow-lg);
+      max-height: 240px;
+      overflow-y: auto;
+      margin-top: 4px;
+    }
+    .meli-cat-item {
+      padding: 10px 14px;
+      cursor: pointer;
+      font-size: var(--text-body-sm);
+      color: var(--color-text-primary);
+      border-bottom: 1px solid var(--color-border);
+      transition: background var(--transition-fast);
+      display: flex;
+      justify-content: space-between;
+      align-items: center;
+    }
+    .meli-cat-item:last-child { border-bottom: none; }
+    .meli-cat-item:hover,
+    .meli-cat-item.is-active {
+      background: var(--color-surface-2);
+    }
+    .meli-cat-item .cat-id {
+      font-size: var(--text-caption);
+      color: var(--color-text-muted);
+      margin-left: 8px;
+      font-family: var(--font-mono);
+    }
+    .meli-cat-loading,
+    .meli-cat-empty {
+      padding: 12px 14px;
+      font-size: var(--text-caption);
+      color: var(--color-text-muted);
+      text-align: center;
+    }
diff --git a/pos/static/css/pos-glass.css b/pos/static/css/pos-glass.css
index fc7943f..770b3c9 100644
--- a/pos/static/css/pos-glass.css
+++ b/pos/static/css/pos-glass.css
@@ -18,14 +18,22 @@ body {
    SIDEBAR — Glass treatment
    ========================================================================== */
 
+/* Prevent flash/stun while sidebar.js replaces static sidebar markup */
 .sidebar,
 .pos-sidebar {
+  opacity: 0;
+  transition: opacity 0.15s ease;
   background: var(--glass-bg-strong) !important;
   backdrop-filter: blur(20px);
   -webkit-backdrop-filter: blur(20px);
   border-right: 1px solid var(--glass-border) !important;
 }
 
+body.sidebar-ready .sidebar,
+body.sidebar-ready .pos-sidebar {
+  opacity: 1;
+}
+
 .sidebar__logo {
   position: relative;
 }
diff --git a/pos/static/js/app-init.min.js b/pos/static/js/app-init.min.js
deleted file mode 100644
index 1f8c0c6..0000000
--- a/pos/static/js/app-init.min.js
+++ /dev/null
@@ -1 +0,0 @@
-!function(){"use strict";var e=localStorage.getItem("pos_token");if(e){try{var t=JSON.parse(atob(e.split(".")[1]));if(1e3*t.exp<Date.now())return localStorage.removeItem("pos_token"),localStorage.removeItem("pos_employee"),void(window.location.href="/pos/login")}catch(e){return localStorage.removeItem("pos_token"),void(window.location.href="/pos/login")}var o={};try{o=JSON.parse(localStorage.getItem("pos_employee")||"{}")}catch(e){}var n=o.name||t.name||"Usuario",a=o.role||t.role||"",r="function"==typeof window.t?window.t:function(e){return e},i={owner:r("role_owner"),admin:r("role_admin"),cashier:r("role_cashier"),warehouse:r("role_warehouse"),accountant:r("role_accountant")}[a]||a,c=n.split(" ").map((function(e){return e[0]})).join("").toUpperCase().substring(0,2);document.querySelectorAll(".sidebar__user-name").forEach((function(e){e.textContent=n})),document.querySelectorAll(".sidebar__user-role").forEach((function(e){e.textContent=i})),document.querySelectorAll(".sidebar__user-avatar, .sidebar__avatar").forEach((function(e){e.textContent=c})),document.querySelectorAll(".profile-info__name").forEach((function(e){e.textContent=n})),document.querySelectorAll(".profile-info__role").forEach((function(e){e.textContent=i})),document.querySelectorAll(".theme-bar__label").forEach((function(e){-1===e.textContent.indexOf("Usuario:")&&-1===e.textContent.indexOf("Sucursal")||(e.textContent="Sucursal Principal — "+n)})),document.querySelectorAll(".status-bar .user-name, .status-info span").forEach((function(e){var t=e.textContent;["Hugo M.","Hugo García","J. Ramírez","José Ramírez","Carlos M.","Admin"].forEach((function(o){-1!==t.indexOf(o)&&(e.textContent=t.replace(o,n))}))}));var l=window.location.pathname;document.querySelectorAll(".nav-item, .nav-link").forEach((function(e){e.classList.remove("is-active","active"),(e.getAttribute("href")||"")===l&&(e.classList.add("is-active"),e.classList.add("active"))})),window.posLogout=function(){localStorage.removeItem("pos_token"),localStorage.removeItem("pos_employee"),localStorage.removeItem("pos_tenant_id"),localStorage.removeItem("pos_cart"),window.location.href="/pos/login"},document.querySelectorAll('[data-action="logout"], .btn-logout, .logout-btn').forEach((function(e){e.addEventListener("click",(function(e){e.preventDefault(),posLogout()}))}));var s=localStorage.getItem("pos_theme");s||(s=window.matchMedia&&window.matchMedia("(prefers-color-scheme: dark)").matches?"industrial":"modern"),document.documentElement.setAttribute("data-theme",s),document.querySelectorAll(".theme-bar").forEach((function(e){e.style.display="none"})),window.posSetTheme=function(e){document.documentElement.setAttribute("data-theme",e),localStorage.setItem("pos_theme",e)},window.setTheme=window.posSetTheme,window.matchMedia&&window.matchMedia("(prefers-color-scheme: dark)").addEventListener("change",(function(e){if(!localStorage.getItem("pos_theme")){var t=e.matches?"industrial":"modern";document.documentElement.setAttribute("data-theme",t)}})),setTimeout((function(){document.documentElement.setAttribute("data-theme",s)}),100),window.POS_USER={name:n,role:a,roleLabel:i,initials:c,token:e,tenantId:t.tenant_id,employeeId:t.employee_id,branchId:t.branch_id,permissions:t.permissions||[]}}else window.location.href="/pos/login"}();
\ No newline at end of file
diff --git a/pos/static/js/brand-catalog.js b/pos/static/js/brand-catalog.js
index 35c680a..110cc71 100644
--- a/pos/static/js/brand-catalog.js
+++ b/pos/static/js/brand-catalog.js
@@ -6,6 +6,7 @@
     _offset: 0,
     _limit: 50,
     _total: 0,
+    _allowedBrands: [],
 
     // Navigation state
     nav: {
@@ -71,7 +72,9 @@
     },
 
     loading: function(on) {
-      this.el('brandCatalogLoading').style.display = on ? 'block' : 'none';
+      var el = this.el('brandCatalogLoading');
+      if (on) el.classList.add('is-visible');
+      else el.classList.remove('is-visible');
     },
 
     setContent: function(html) {
@@ -88,23 +91,23 @@
 
     buildBreadcrumb: function() {
       var parts = [];
-      parts.push('<a href="javascript:void(0)" onclick="BrandCatalog.loadBrands()" style="color:var(--color-primary);text-decoration:none;">Marcas</a>');
+      parts.push('<a href="javascript:void(0)" class="breadcrumb__link" onclick="BrandCatalog.loadBrands()">Marcas</a>');
       if (this.nav.brand) {
-        parts.push('<a href="javascript:void(0)" onclick="BrandCatalog.selectBrand(' + JSON.stringify(this.nav.brand) + ',' + this.nav.brandId + ')" style="color:var(--color-primary);text-decoration:none;">' + escapeHtml(this.nav.brand) + '</a>');
+        parts.push('<a href="javascript:void(0)" class="breadcrumb__link" onclick=\'BrandCatalog.selectBrand(' + JSON.stringify(this.nav.brand) + ',' + this.nav.brandId + ')\'>' + escapeHtml(this.nav.brand) + '</a>');
       }
       if (this.nav.model) {
-        parts.push('<a href="javascript:void(0)" onclick="BrandCatalog.selectModel(' + this.nav.modelId + ',' + JSON.stringify(this.nav.model) + ')" style="color:var(--color-primary);text-decoration:none;">' + escapeHtml(this.nav.model) + '</a>');
+        parts.push('<a href="javascript:void(0)" class="breadcrumb__link" onclick=\'BrandCatalog.selectModel(' + this.nav.modelId + ',' + JSON.stringify(this.nav.model) + ')\'>' + escapeHtml(this.nav.model) + '</a>');
       }
       if (this.nav.year) {
-        parts.push('<a href="javascript:void(0)" onclick="BrandCatalog.selectYear(' + this.nav.yearId + ',' + this.nav.year + ')" style="color:var(--color-primary);text-decoration:none;">' + this.nav.year + '</a>');
+        parts.push('<a href="javascript:void(0)" class="breadcrumb__link" onclick=\'BrandCatalog.selectYear(' + this.nav.yearId + ',' + this.nav.year + ')\'>' + this.nav.year + '</a>');
       }
       if (this.nav.engine) {
-        parts.push('<a href="javascript:void(0)" onclick="BrandCatalog.selectEngine(' + this.nav.myeId + ',' + JSON.stringify(this.nav.engine) + ')" style="color:var(--color-primary);text-decoration:none;">' + escapeHtml(this.nav.engine) + '</a>');
+        parts.push('<a href="javascript:void(0)" class="breadcrumb__link" onclick=\'BrandCatalog.selectEngine(' + this.nav.myeId + ',' + JSON.stringify(this.nav.engine) + ')\'>' + escapeHtml(this.nav.engine) + '</a>');
       }
       if (this.nav.category) {
-        parts.push('<strong>' + escapeHtml(this.nav.category) + '</strong>');
+        parts.push('<span class="breadcrumb__current">' + escapeHtml(this.nav.category) + '</span>');
       }
-      this.setBreadcrumb(parts.join(' &rsaquo; '));
+      this.setBreadcrumb('<nav class="breadcrumb">' + parts.join('<span class="breadcrumb__sep">&rsaquo;</span>') + '</nav>');
     },
 
     // ---------- BRANDS ----------
@@ -112,12 +115,10 @@
       this.loading(true);
       this.state = 'brands';
       this.reset();
-      this.setBreadcrumb('<strong>Marcas de vehiculo</strong>');
+      this.setBreadcrumb('<nav class="breadcrumb"><span class="breadcrumb__current">Marcas de vehiculo</span></nav>');
       this.setSearch(
         '<input type="text" id="brandSearchInput" placeholder="Buscar marca..." ' +
-        'style="width:100%;padding:10px 14px;border:1px solid var(--color-border);border-radius:var(--radius-md);' +
-        'font-size:var(--text-body);background:var(--color-surface);color:var(--color-text-primary);' +
-        'outline:none;" oninput="BrandCatalog.filterBrands(this.value)">'
+        'class="level-filter" oninput="BrandCatalog.filterBrands(this.value)">'
       );
       var self = this;
       fetch('/pos/api/catalog/vehicle-brands', { headers: this._headers() })
@@ -130,24 +131,25 @@
           self.loading(false);
           self._allBrands = data.brands || [];
           if (!self._allBrands.length) {
-            self.setContent('<p style="grid-column:1/-1;text-align:center;color:var(--color-text-muted);">No se encontraron marcas.</p>');
+            self.setContent('<div class="empty-state is-visible"><div class="empty-state__title">No se encontraron marcas.</div></div>');
             return;
           }
           self.renderBrandList(self._allBrands);
         })
         .catch(function(err) {
           self.loading(false);
-          self.setContent('<p style="grid-column:1/-1;text-align:center;color:var(--color-error);">Error al cargar marcas: ' + escapeHtml(err.message) + '</p>');
+          self.setContent('<div class="empty-state is-visible"><div class="empty-state__title">Error al cargar marcas</div><div class="empty-state__subtitle">' + escapeHtml(err.message) + '</div></div>');
         });
     },
 
     renderBrandList: function(brands) {
-      var html = '';
+      var html = '<div class="nav-grid">';
       brands.forEach(function(b) {
-        html += '<div class="catalog-category-card" onclick="BrandCatalog.selectBrand(' + JSON.stringify(b.name) + ',' + b.id + ')">' +
-          '<div style="font-size:var(--text-h4);font-family:var(--font-heading);margin-bottom:4px;">' + escapeHtml(b.name) + '</div>' +
+        html += '<div class="nav-card" onclick=\'BrandCatalog.selectBrand(' + JSON.stringify(b.name) + ',' + b.id + ')\'>' +
+          '<div class="nav-card__name">' + escapeHtml(b.name) + '</div>' +
           '</div>';
       });
+      html += '</div>';
       this.setContent(html);
     },
 
@@ -186,23 +188,28 @@
           self.loading(false);
           var models = data.data || [];
           if (!models.length) {
-            self.setContent('<p style="grid-column:1/-1;text-align:center;color:var(--color-text-muted);">No se encontraron modelos.</p>');
+            self.setContent('<div class="empty-state is-visible"><div class="empty-state__title">No se encontraron modelos.</div></div>');
             return;
           }
-          var html = '';
-          models.forEach(function(m) {
-            html += '<div class="catalog-category-card" onclick="BrandCatalog.selectModel(' + m.id_model + ',' + JSON.stringify(m.display_name || m.name_model) + ')">' +
-              '<div style="font-size:var(--text-h4);font-family:var(--font-heading);margin-bottom:4px;">' + escapeHtml(m.display_name || m.name_model) + '</div>' +
-              '</div>';
-          });
-          self.setContent(html);
+          self.renderModelList(models);
         })
         .catch(function(err) {
           self.loading(false);
-          self.setContent('<p style="grid-column:1/-1;text-align:center;color:var(--color-error);">Error al cargar modelos: ' + escapeHtml(err.message) + '</p>');
+          self.setContent('<div class="empty-state is-visible"><div class="empty-state__title">Error al cargar modelos</div><div class="empty-state__subtitle">' + escapeHtml(err.message) + '</div></div>');
         });
     },
 
+    renderModelList: function(models) {
+      var html = '<div class="nav-grid">';
+      models.forEach(function(m) {
+        html += '<div class="nav-card" onclick=\'BrandCatalog.selectModel(' + m.id_model + ',' + JSON.stringify(m.display_name || m.name_model) + ')\'>' +
+          '<div class="nav-card__name">' + escapeHtml(m.display_name || m.name_model) + '</div>' +
+          '</div>';
+      });
+      html += '</div>';
+      this.setContent(html);
+    },
+
     selectModel: function(modelId, modelName) {
       this.nav.model = modelName;
       this.nav.modelId = modelId;
@@ -226,23 +233,28 @@
           self.loading(false);
           var years = data.data || [];
           if (!years.length) {
-            self.setContent('<p style="grid-column:1/-1;text-align:center;color:var(--color-text-muted);">No se encontraron años.</p>');
+            self.setContent('<div class="empty-state is-visible"><div class="empty-state__title">No se encontraron años.</div></div>');
             return;
           }
-          var html = '';
-          years.forEach(function(y) {
-            html += '<div class="catalog-category-card" onclick="BrandCatalog.selectYear(' + y.id_year + ',' + y.year_car + ')">' +
-              '<div style="font-size:var(--text-h4);font-family:var(--font-heading);margin-bottom:4px;">' + y.year_car + '</div>' +
-              '</div>';
-          });
-          self.setContent(html);
+          self.renderYearList(years);
         })
         .catch(function(err) {
           self.loading(false);
-          self.setContent('<p style="grid-column:1/-1;text-align:center;color:var(--color-error);">Error al cargar años: ' + escapeHtml(err.message) + '</p>');
+          self.setContent('<div class="empty-state is-visible"><div class="empty-state__title">Error al cargar años</div><div class="empty-state__subtitle">' + escapeHtml(err.message) + '</div></div>');
         });
     },
 
+    renderYearList: function(years) {
+      var html = '<div class="nav-grid nav-grid--years">';
+      years.forEach(function(y) {
+        html += '<div class="nav-card nav-card--year" onclick=\'BrandCatalog.selectYear(' + y.id_year + ',' + y.year_car + ')\'>' +
+          '<div class="nav-card__name">' + y.year_car + '</div>' +
+          '</div>';
+      });
+      html += '</div>';
+      this.setContent(html);
+    },
+
     selectYear: function(yearId, yearCar) {
       this.nav.year = yearCar;
       this.nav.yearId = yearId;
@@ -266,24 +278,29 @@
           self.loading(false);
           var engines = data.data || [];
           if (!engines.length) {
-            self.setContent('<p style="grid-column:1/-1;text-align:center;color:var(--color-text-muted);">No se encontraron motores.</p>');
+            self.setContent('<div class="empty-state is-visible"><div class="empty-state__title">No se encontraron motores.</div></div>');
             return;
           }
-          var html = '';
-          engines.forEach(function(e) {
-            html += '<div class="catalog-category-card" onclick="BrandCatalog.selectEngine(' + e.id_mye + ',' + JSON.stringify(e.name_engine) + ')">' +
-              '<div style="font-size:var(--text-h4);font-family:var(--font-heading);margin-bottom:4px;">' + escapeHtml(e.name_engine) + '</div>' +
-              '<div style="font-size:var(--text-body-sm);color:var(--color-text-muted);">' + escapeHtml(e.trim_level || '') + '</div>' +
-              '</div>';
-          });
-          self.setContent(html);
+          self.renderEngineList(engines);
         })
         .catch(function(err) {
           self.loading(false);
-          self.setContent('<p style="grid-column:1/-1;text-align:center;color:var(--color-error);">Error al cargar motores: ' + escapeHtml(err.message) + '</p>');
+          self.setContent('<div class="empty-state is-visible"><div class="empty-state__title">Error al cargar motores</div><div class="empty-state__subtitle">' + escapeHtml(err.message) + '</div></div>');
         });
     },
 
+    renderEngineList: function(engines) {
+      var html = '<div class="nav-grid">';
+      engines.forEach(function(e) {
+        html += '<div class="nav-card" onclick=\'BrandCatalog.selectEngine(' + e.id_mye + ',' + JSON.stringify(e.name_engine) + ')\'>' +
+          '<div class="nav-card__name">' + escapeHtml(e.name_engine) + '</div>' +
+          '<div class="nav-card__sub">' + escapeHtml(e.trim_level || '') + '</div>' +
+          '</div>';
+      });
+      html += '</div>';
+      this.setContent(html);
+    },
+
     selectEngine: function(myeId, engineName) {
       this.nav.engine = engineName;
       this.nav.myeId = myeId;
@@ -305,26 +322,36 @@
         .then(function(data) {
           if (!data) return;
           self.loading(false);
+          self._allowedBrands = data.allowed_brands || [];
           var categories = data.data || [];
           if (!categories.length) {
-            self.setContent('<p style="grid-column:1/-1;text-align:center;color:var(--color-text-muted);">No se encontraron categorias.</p>');
+            var msg = 'No se encontraron categorias.';
+            if (self._allowedBrands.length) {
+              msg = 'Este vehiculo no tiene cobertura de ' + self._allowedBrands.join(', ') + '.';
+            }
+            self.setContent('<div class="empty-state is-visible"><div class="empty-state__title">' + msg + '</div><div class="empty-state__subtitle">Prueba con otro vehiculo o contacta a soporte para ampliar el catalogo.</div></div>');
             return;
           }
-          var html = '';
-          categories.forEach(function(c) {
-            html += '<div class="catalog-category-card" onclick="BrandCatalog.selectCategory(' + c.id_part_category + ',' + JSON.stringify(c.name) + ')">' +
-              '<div style="font-size:var(--text-h4);font-family:var(--font-heading);margin-bottom:4px;">' + escapeHtml(c.name) + '</div>' +
-              '<div style="font-size:var(--text-body-sm);color:var(--color-text-muted);">' + (c.part_count || 0) + ' refacciones</div>' +
-              '</div>';
-          });
-          self.setContent(html);
+          self.renderCategoryList(categories);
         })
         .catch(function(err) {
           self.loading(false);
-          self.setContent('<p style="grid-column:1/-1;text-align:center;color:var(--color-error);">Error al cargar categorias: ' + escapeHtml(err.message) + '</p>');
+          self.setContent('<div class="empty-state is-visible"><div class="empty-state__title">Error al cargar categorias</div><div class="empty-state__subtitle">' + escapeHtml(err.message) + '</div></div>');
         });
     },
 
+    renderCategoryList: function(categories) {
+      var html = '<div class="nav-grid">';
+      categories.forEach(function(c) {
+        html += '<div class="nav-card" onclick=\'BrandCatalog.selectCategory(' + c.id_part_category + ',' + JSON.stringify(c.name) + ')\'>' +
+          '<div class="nav-card__name">' + escapeHtml(c.name) + '</div>' +
+          '<div class="nav-card__sub">' + (c.part_count || 0) + ' refacciones</div>' +
+          '</div>';
+      });
+      html += '</div>';
+      this.setContent(html);
+    },
+
     selectCategory: function(catId, catName) {
       this.nav.category = catName;
       this.nav.categoryId = catId;
@@ -340,11 +367,10 @@
       this.setSearch(
         '<div style="display:flex;gap:var(--space-2);flex-wrap:wrap;align-items:center;">' +
           '<input type="text" id="partsSearchInput" placeholder="Buscar refaccion..." value="' + escapeHtml(searchTerm || '') + '" ' +
-          'style="flex:1;min-width:200px;padding:10px 14px;border:1px solid var(--color-border);border-radius:var(--radius-md);' +
-          'font-size:var(--text-body);background:var(--color-surface);color:var(--color-text-primary);outline:none;" ' +
+          'class="level-filter" ' +
           'onkeydown="if(event.key===\'Enter\')BrandCatalog.searchParts(this.value)">' +
-          '<button class="btn btn--primary btn--sm" onclick="BrandCatalog.searchParts(document.getElementById(\'partsSearchInput\').value)">Buscar</button>' +
-          '<button class="btn btn--secondary btn--sm" onclick="BrandCatalog.clearPartsSearch()">Limpiar</button>' +
+          '<button class="btn btn-primary" onclick="BrandCatalog.searchParts(document.getElementById(\'partsSearchInput\').value)">Buscar</button>' +
+          '<button class="btn btn-ghost" onclick="BrandCatalog.clearPartsSearch()">Limpiar</button>' +
         '</div>'
       );
       var url = '/pos/api/catalog/mye-parts?mye_id=' + encodeURIComponent(myeId) + '&category_id=' + encodeURIComponent(categoryId) +
@@ -361,6 +387,7 @@
         .then(function(data) {
           if (!data) return;
           self.loading(false);
+          self._allowedBrands = data.allowed_brands || [];
           self._lastItems = data.items || [];
           self._total = data.total || 0;
           self._offset = data.offset || 0;
@@ -368,16 +395,20 @@
         })
         .catch(function(err) {
           self.loading(false);
-          self.setContent('<p style="grid-column:1/-1;text-align:center;color:var(--color-error);">Error al cargar refacciones: ' + escapeHtml(err.message) + '</p>');
+          self.setContent('<div class="empty-state is-visible"><div class="empty-state__title">Error al cargar refacciones</div><div class="empty-state__subtitle">' + escapeHtml(err.message) + '</div></div>');
         });
     },
 
     renderPartsList: function(items, searchTerm) {
       var html = '';
       if (!items.length) {
-        html += '<div style="grid-column:1/-1;text-align:center;padding:var(--space-8);">' +
-          '<p style="color:var(--color-text-muted);font-size:var(--text-body-lg);">No se encontraron refacciones.</p>' +
-          '<button class="btn btn--primary" style="margin-top:var(--space-3);" onclick="BrandCatalog.loadCategories(' + this.nav.myeId + ')">Volver a categorias</button>' +
+        var msg = 'No se encontraron refacciones.';
+        if (this._allowedBrands.length) {
+          msg = 'No hay refacciones de ' + this._allowedBrands.join(', ') + ' en esta categoria.';
+        }
+        html += '<div class="empty-state is-visible">' +
+          '<div class="empty-state__title">' + msg + '</div>' +
+          '<div class="empty-state__subtitle"><button class="btn btn-primary" onclick="BrandCatalog.loadCategories(' + this.nav.myeId + ')">Volver a categorias</button></div>' +
           '</div>';
         this.setContent(html);
         return;
@@ -389,40 +420,55 @@
         'Mostrando ' + startIdx + '-' + endIdx + ' de ' + this._total + ' refacciones' +
         '</div>';
 
-      html += '<div style="grid-column:1/-1;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:var(--space-3);">';
+      html += '<div class="nav-grid nav-grid--parts">';
       items.forEach(function(p) {
-        var price = p.local_price ? '$' + Number(p.local_price).toFixed(2) : 'Consultar precio';
-        var img = '/pos/static/images/placeholder-part.png';
+        var hasAm = !!p.manufacturer;
+        var price = p.local_price
+          ? '$' + Number(p.local_price).toFixed(2)
+          : (p.price_usd ? '$' + Number(p.price_usd).toFixed(2) : 'Consultar precio');
         var stockBadge = p.local_stock > 0
-          ? '<span style="display:inline-block;background:var(--color-success);color:#fff;font-size:11px;padding:2px 8px;border-radius:var(--radius-sm);margin-left:6px;">' + p.local_stock + ' en stock</span>'
-          : '<span style="display:inline-block;background:var(--color-text-muted);color:#fff;font-size:11px;padding:2px 8px;border-radius:var(--radius-sm);margin-left:6px;">Sin stock local</span>';
-        html += '<div class="catalog-category-card" style="padding:0;overflow:hidden;display:flex;flex-direction:column;">' +
-          '<div style="height:160px;background:#f5f5f5;display:flex;align-items:center;justify-content:center;">' +
-            '<img src="' + escapeHtml(img) + '" alt="" style="max-width:100%;max-height:100%;object-fit:contain;">' +
+          ? '<span class="stock-badge stock-badge--local">En stock</span>'
+          : '<span class="stock-badge stock-badge--none">Sin stock local</span>';
+        var imgHtml = p.image_url
+          ? '<img src="' + escapeHtml(p.image_url) + '" alt="">'
+          : '<svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5"><path d="M21 16V8a2 2 0 0 0-1-1.73l-7-4a2 2 0 0 0-2 0l-7 4A2 2 0 0 0 3 8v8a2 2 0 0 0 1 1.73l7 4a2 2 0 0 0 2 0l7-4A2 2 0 0 0 21 16z"/><polyline points="3.27 6.96 12 12.01 20.73 6.96"/><line x1="12" y1="22.08" x2="12" y2="12"/></svg>';
+        var brandLine = hasAm
+          ? '<div style="font-size:var(--text-caption);color:var(--color-accent);font-weight:600;">' + escapeHtml(p.manufacturer) + '</div>'
+          : '';
+        html += '<div class="part-card">' +
+          '<div class="part-card__image">' + imgHtml + '</div>' +
+          '<div class="part-card__body">' +
+            brandLine +
+            '<div class="part-card__oem">' + escapeHtml(p.oem_part_number || 'N/A') + '</div>' +
+            '<div class="part-card__name">' + escapeHtml(p.name || '') + '</div>' +
           '</div>' +
-          '<div style="padding:var(--space-3);flex:1;display:flex;flex-direction:column;">' +
-            '<div style="font-weight:600;font-size:var(--text-body);margin-bottom:4px;">' + escapeHtml(p.oem_part_number || 'N/A') + stockBadge + '</div>' +
-            '<div style="font-size:var(--text-body-sm);color:var(--color-text-muted);margin-bottom:8px;flex:1;">' + escapeHtml(p.name || '') + '</div>' +
-            '<div style="font-size:var(--text-h5);font-weight:700;color:var(--color-primary);margin-bottom:8px;">' + price + '</div>' +
-            '<button class="btn btn--primary btn--sm" style="width:100%;" onclick="BrandCatalog.addToCart(' + p.id + ', event)">Agregar</button>' +
+          '<div class="part-card__footer">' +
+            stockBadge +
+            '<span class="part-card__price">' + price + '</span>' +
           '</div>' +
+          '<button class="btn btn-primary" onclick="BrandCatalog.addToCart(' + p.id + ', event)">Agregar</button>' +
           '</div>';
       });
       html += '</div>';
 
+      html += this.renderPagination();
+
+      this.setContent(html);
+    },
+
+    renderPagination: function() {
       var hasPrev = this._offset > 0;
       var hasNext = (this._offset + this._limit) < this._total;
       var pageNum = Math.floor(this._offset / this._limit) + 1;
       var totalPages = Math.ceil(this._total / this._limit) || 1;
-      html += '<div style="grid-column:1/-1;display:flex;justify-content:center;align-items:center;gap:var(--space-3);padding:var(--space-4) 0;">' +
-        '<button class="btn btn--secondary" ' + (hasPrev ? '' : 'disabled style="opacity:0.5;cursor:not-allowed;"') +
+      var html = '<div class="pagination">' +
+        '<button class="page-item" ' + (hasPrev ? '' : 'disabled') +
         ' onclick="BrandCatalog.goToPage(' + (this._offset - this._limit) + ')">&larr; Anterior</button>' +
         '<span style="font-size:var(--text-body-sm);color:var(--color-text-muted);">Pagina ' + pageNum + ' de ' + totalPages + '</span>' +
-        '<button class="btn btn--secondary" ' + (hasNext ? '' : 'disabled style="opacity:0.5;cursor:not-allowed;"') +
+        '<button class="page-item" ' + (hasNext ? '' : 'disabled') +
         ' onclick="BrandCatalog.goToPage(' + (this._offset + this._limit) + ')">Siguiente &rarr;</button>' +
         '</div>';
-
-      this.setContent(html);
+      return html;
     },
 
     searchParts: function(term) {
@@ -451,16 +497,17 @@
         return;
       }
       if (window.CatalogApp && CatalogApp.addToCart) {
+        var isAftermarket = !!part.manufacturer;
         CatalogApp.addToCart({
-          id: part.id,
+          id: part.oem_id || part.id,
           part_number: part.oem_part_number || 'N/A',
           name: part.name || 'Refaccion',
-          brand: '',
-          price: part.local_price || 0,
+          brand: part.manufacturer || '',
+          price: part.local_price || part.price_usd || 0,
           tax_rate: 0.16,
           unit: 'PZA',
           stock: part.local_stock || 0,
-          source: 'oem-brand',
+          source: isAftermarket ? 'aftermarket' : 'oem-brand',
           inventory_id: null
         }, 1);
         var btn = event.target;
diff --git a/pos/static/js/catalog.js b/pos/static/js/catalog.js
index c239a27..f8667ae 100644
--- a/pos/static/js/catalog.js
+++ b/pos/static/js/catalog.js
@@ -349,10 +349,14 @@
         var cacheKey = 'nexus:brands:' + catalogMode;
         var cached = sessionStorage.getItem(cacheKey);
         if (cached) {
-            hideLoading();
-            var data = JSON.parse(cached);
-            renderBrands(data);
-            return;
+            try {
+                hideLoading();
+                var data = JSON.parse(cached);
+                renderBrands(data);
+                return;
+            } catch (e) {
+                sessionStorage.removeItem(cacheKey);
+            }
         }
 
         apiFetch(API + '/brands?mode=' + catalogMode).then(function (data) {
@@ -1631,8 +1635,13 @@
         var cacheKey = 'nexus:years-all';
         var cached = sessionStorage.getItem(cacheKey);
         if (cached) {
-            var data = JSON.parse(cached);
-            var years = data.data || data || [];
+            try {
+                var data = JSON.parse(cached);
+                var years = data.data || data || [];
+            } catch (e) {
+                sessionStorage.removeItem(cacheKey);
+                var years = [];
+            }
             if (!years.length) {
                 years = [];
                 for (var y = 2026; y >= 1990; y--) years.push({ id_year: y, year_car: y });
diff --git a/pos/static/js/catalog.min.js b/pos/static/js/catalog.min.js
deleted file mode 100644
index 6468fea..0000000
--- a/pos/static/js/catalog.min.js
+++ /dev/null
@@ -1 +0,0 @@
-!function(){"use strict";var e="/pos/api/catalog",a=localStorage.getItem("pos_token");if(a){var t={Authorization:"Bearer "+a,"Content-Type":"application/json"},n=document.getElementById("breadcrumb"),o=document.getElementById("searchInput"),i=document.getElementById("searchDropdown"),r=document.getElementById("levelTitle"),s=document.getElementById("levelFilter"),l=document.getElementById("loading"),d=document.getElementById("emptyState"),c=document.getElementById("emptyTitle"),u=document.getElementById("emptySubtitle"),p=document.getElementById("navGrid"),m=document.getElementById("partsGrid"),v=document.getElementById("pagination"),g=document.getElementById("pageBody"),y=document.getElementById("detailPanel"),f=document.getElementById("detailOverlay"),_=document.getElementById("detailBody"),h=document.getElementById("detailFooter"),b=document.getElementById("detailClose"),x=document.getElementById("qtyMinus"),E=document.getElementById("qtyPlus"),k=document.getElementById("qtyDisplay"),I=document.getElementById("addToCartBtn"),T=document.getElementById("cartSidebar"),S=document.getElementById("cartOverlay"),L=document.getElementById("cartItems"),C=document.getElementById("cartEmpty"),M=document.getElementById("cartSubtotal"),B=document.getElementById("cartTax"),w=document.getElementById("cartTotal"),N=document.getElementById("cartBadge"),A=document.getElementById("checkoutBtn"),H=document.getElementById("cartFab"),P=document.getElementById("cartCloseBtn"),j={level:"brands",brand:null,model:null,year:null,engine:null,category:null,group:null,partType:null,nxGroup:null,nxSubgroup:null,nxPartType:null},q="local";localStorage.setItem("catalog_mode","local");var O=1,G=null,U=1,R=!1;window.addEventListener("popstate",(function(e){e.state&&(R=!0,j.level=e.state.level||"brands",j.brand=e.state.brand,j.model=e.state.model,j.year=e.state.year,j.engine=e.state.engine,j.category=e.state.category,j.group=e.state.group,j.partType=e.state.partType||null,j.nxGroup=e.state.nxGroup||null,j.nxSubgroup=e.state.nxSubgroup||null,j.nxPartType=e.state.nxPartType||null,O=e.state.page||1,"brands"===j.level?he():"models"===j.level?be():"years"===j.level?xe():"engines"===j.level?Ee():"categories"===j.level?Te():"groups"===j.level?j.nxGroup?Se():ke():"part_types"===j.level?j.nxSubgroup?Le():Ie():"parts"===j.level?Me(O):he(),R=!1)})),history.replaceState(JSON.parse(JSON.stringify(j)),"","/pos/catalog");var $=JSON.parse(localStorage.getItem("pos_cart")||"[]"),V=null;b.addEventListener("click",Ne),f.addEventListener("click",Ne),x.addEventListener("click",(function(){U>1&&(U--,k.textContent=U)})),E.addEventListener("click",(function(){U++,k.textContent=U})),I.addEventListener("click",(function(){if(G){var e=G.part,a=G.local;a&&(qe({id:e.id_part,part_number:e.oem_part_number,name:e.name,brand:"",price:a.price_1,tax_rate:a.tax_rate||.16,unit:a.unit||"PZA",stock:a.stock,source:"local",inventory_id:a.inventory_id},U),Ne())}}));var z=null,J=null;o.addEventListener("input",(function(){clearTimeout(z);var e=this.value.trim();(He(e.length>=3?Ae(e):null),e.length<2)?i.classList.remove("is-visible"):"keyword"===Ae(e)&&(z=setTimeout((function(){je(e)}),350))})),o.addEventListener("keydown",(function(e){if("Enter"===e.key){e.preventDefault(),clearTimeout(z);var a=this.value.trim();a.length>=2&&Pe(a)}"Escape"===e.key&&(i.classList.remove("is-visible"),He(null))})),document.addEventListener("click",(function(e){i.contains(e.target)||e.target===o||i.classList.remove("is-visible")})),L.addEventListener("click",(function(e){var a=e.target.closest("[data-cart-action]");if(a){var t=parseInt(a.dataset.idx),n=a.dataset.cartAction;"dec"===n?Ge(t,$[t].quantity-1):"inc"===n?Ge(t,$[t].quantity+1):"remove"===n&&Oe(t)}})),H.addEventListener("click",$e),P.addEventListener("click",$e),S.addEventListener("click",$e),A.addEventListener("click",Ve);var D="",Z=null;document.addEventListener("keydown",(function(e){if("F1"===e.key)return e.preventDefault(),void o.focus();if("Escape"===e.key)return Ne(),void(T.classList.contains("open")&&$e());if("INPUT"!==document.activeElement.tagName&&"TEXTAREA"!==document.activeElement.tagName){if("Enter"===e.key&&D.length>=4){var a=D.trim();return D="",o.value=a,void je(a)}1===e.key.length&&(D+=e.key,clearTimeout(Z),Z=setTimeout((function(){D=""}),200))}})),document.querySelectorAll("[data-theme-switch]").forEach((function(e){e.addEventListener("click",(function(){var e=this.dataset.themeSwitch;document.documentElement.setAttribute("data-theme",e),localStorage.setItem("pos_theme",e),document.querySelectorAll("[data-theme-switch]").forEach((function(e){e.classList.remove("is-active"),e.setAttribute("aria-pressed","false")})),this.classList.add("is-active"),this.setAttribute("aria-pressed","true")}));var a=localStorage.getItem("pos_theme")||"industrial";e.dataset.themeSwitch===a?(e.classList.add("is-active"),e.setAttribute("aria-pressed","true")):(e.classList.remove("is-active"),e.setAttribute("aria-pressed","false"))}));var F=document.getElementById("vsYear"),Y=document.getElementById("vsBrand"),Q=document.getElementById("vsModel"),W=document.getElementById("vsEngine"),X=document.getElementById("vsClear"),K=document.getElementById("plateInputWrap"),ee=document.getElementById("plateInput"),ae=document.getElementById("plateStatus"),te=document.getElementById("plateToggle");ee&&ee.addEventListener("keydown",(function(e){"Enter"===e.key&&(e.preventDefault(),Fe())}));var ne=document.getElementById("vinInputWrap"),oe=document.getElementById("vinInput"),ie=document.getElementById("vinStatus"),re=document.getElementById("vinToggle");oe&&oe.addEventListener("keydown",(function(e){"Enter"===e.key&&(e.preventDefault(),Ye())})),window.CatalogApp={toggleCart:$e,goToCheckout:Ve,addToCart:qe,removeFromCart:Oe,updateQty:Ge,clearCart:function(){$=[],Ue(),Re()},loadPage:function(e){Me(e)},vsYearChanged:function(){var a=F.value;Y.innerHTML='<option value="">Marca...</option>',Q.innerHTML='<option value="">Modelo...</option>',W.innerHTML='<option value="">Motor...</option>',Y.disabled=!0,Q.disabled=!0,W.disabled=!0,X.style.display=a?"":"none",a&&(Y.disabled=!1,de(e+"/brands?year_id="+a+"&mode="+q).then((function(e){var a=e.data||e;a&&(Y.innerHTML='<option value="">Marca...</option>'+a.map((function(e){return'<option value="'+e.id_brand+'">'+ve(e.name_brand)+"</option>"})).join(""))})))},vsBrandChanged:function(){var a=Y.value,t=F.value;Q.innerHTML='<option value="">Modelo...</option>',W.innerHTML='<option value="">Motor...</option>',Q.disabled=!0,W.disabled=!0,a&&(Q.disabled=!1,de(e+"/models?brand_id="+a+(t?"&year_id="+t:"")).then((function(e){var a=e.data||e;a&&(Q.innerHTML='<option value="">Modelo...</option>'+a.map((function(e){return'<option value="'+e.id_model+'">'+ve(e.display_name||e.name_model)+"</option>"})).join(""))})))},vsModelChanged:function(){var a=Q.value,t=F.value;W.innerHTML='<option value="">Motor...</option>',W.disabled=!0,a&&t&&(W.disabled=!1,de(e+"/engines?model_id="+a+"&year_id="+t).then((function(e){var a=e.data||e;a&&(W.innerHTML='<option value="">Motor...</option>'+a.map((function(e){var a=e.name_engine+(e.trim_level?" 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ce(){l.classList.add("is-visible"),p.innerHTML="",m.style.display="none",m.innerHTML="",d.classList.remove("is-visible"),v.innerHTML="";var e=document.getElementById("diagLink");e&&"categories"!==j.level&&(e.style.display="none")}function ue(){l.classList.remove("is-visible")}function pe(e,a){c.textContent=e,u.textContent=a||"",d.classList.add("is-visible"),p.innerHTML="",m.style.display="none"}function me(e){return(parseFloat(e)||0).toFixed(2)}function ve(e){if(!e)return"";var a=document.createElement("div");return a.textContent=e,a.innerHTML}function ge(){var e=[];e.push({label:"Catalogo",action:"loadBrands"}),j.brand&&e.push({label:j.brand.name,action:"loadModels"}),j.model&&e.push({label:j.model.name,action:"loadYears"}),j.year&&e.push({label:String(j.year.year),action:"loadEngines"}),j.engine&&e.push({label:j.engine.name,action:"loadCategories"}),j.nxGroup?e.push({label:j.nxGroup.name,action:"loadNxSubgroups"}):j.category&&e.push({label:j.category.name,action:"loadGroups"}),j.nxSubgroup?e.push({label:j.nxSubgroup.name,action:"loadNxPartTypes"}):j.group&&e.push({label:j.group.name,action:"loadPartTypes"}),j.nxPartType?e.push({label:j.nxPartType.name,action:null}):j.partType&&e.push({label:j.partType.name,action:null});for(var a="",t=0;t<e.length;t++)t>0&&(a+='<span class="breadcrumb__sep" aria-hidden="true">/</span>'),t<e.length-1&&e[t].action?a+='<a class="breadcrumb__link" data-bc-action="'+e[t].action+'">'+ve(e[t].label)+"</a>":a+='<span 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o=t[n],i=0;i<o.length;i++)j[o[i]]=null}}function _e(e){if(!e)return s.style.display="none",void(s.value="");s.style.display="",s.value="",s.oninput=function(){var e=this.value.toLowerCase();p.querySelectorAll(".nav-card").forEach((function(a){var t=a.textContent.toLowerCase();a.style.display=t.indexOf(e)>=0?"":"none"}))}}function he(){j.level="brands",le(),ge(),r.textContent="Selecciona una marca",_e(!0),ce();var a="nexus:brands:"+q,t=sessionStorage.getItem(a);if(t)return ue(),void function(e){if(!e||!e.data||!e.data.length)return e?void pe("Sin marcas","El catalogo no tiene marcas con partes disponibles."):void ze();p.className="nav-grid",p.innerHTML=e.data.map((function(e){return'<div class="nav-card" role="listitem" data-brand-id="'+e.id_brand+'" data-name="'+ve(e.name_brand)+'"><div class="nav-card__name">'+ve(e.name_brand)+"</div></div>"})).join(""),p.querySelectorAll(".nav-card").forEach((function(e){e.addEventListener("click",(function(){j.brand={id:parseInt(this.dataset.brandId),name:this.dataset.name},be()}))}))}(JSON.parse(t));de(e+"/brands?mode="+q).then((function(e){if(ue(),e&&e.data&&sessionStorage.setItem(a,JSON.stringify(e)),!e||!e.data||!e.data.length)return e?void pe("Sin marcas","El catalogo no tiene marcas con partes disponibles."):void ze();p.className="nav-grid",p.innerHTML=e.data.map((function(e){return'<div class="nav-card" role="listitem" data-brand-id="'+e.id_brand+'" data-name="'+ve(e.name_brand)+'"><div class="nav-card__name">'+ve(e.name_brand)+"</div></div>"})).join(""),p.querySelectorAll(".nav-card").forEach((function(e){e.addEventListener("click",(function(){j.brand={id:parseInt(this.dataset.brandId),name:this.dataset.name},be()}))}))}))}function be(){j.level="models",le(),ge(),r.textContent="Modelos de "+j.brand.name,_e(!0),ce(),de(e+"/models?brand_id="+j.brand.id).then((function(e){ue(),e&&e.data&&e.data.length?(p.className="nav-grid",p.innerHTML=e.data.map((function(e){return'<div class="nav-card" role="listitem" data-model-id="'+e.id_model+'" data-name="'+ve(e.display_name||e.name_model)+'"><div class="nav-card__name">'+ve(e.display_name||e.name_model)+"</div></div>"})).join(""),p.querySelectorAll(".nav-card").forEach((function(e){e.addEventListener("click",(function(){j.model={id:parseInt(this.dataset.modelId),name:this.dataset.name},xe()}))}))):pe("Sin modelos","No hay modelos con partes para "+j.brand.name)}))}function xe(){j.level="years",le(),ge(),r.textContent=j.brand.name+" "+j.model.name+" — Anios",_e(!1),ce(),de(e+"/years?model_id="+j.model.id).then((function(e){ue(),e&&e.data&&e.data.length?(p.className="nav-grid nav-grid--years",p.innerHTML=e.data.map((function(e){return'<div class="nav-card nav-card--year" role="listitem" data-year-id="'+e.id_year+'" data-year="'+e.year_car+'"><div class="nav-card__name">'+e.year_car+"</div></div>"})).join(""),p.querySelectorAll(".nav-card").forEach((function(e){e.addEventListener("click",(function(){j.year={id:parseInt(this.dataset.yearId),year:parseInt(this.dataset.year)},Ee()}))}))):pe("Sin anios","No hay anios con partes para este modelo.")}))}function Ee(){j.level="engines",le(),ge(),r.textContent=j.brand.name+" "+j.model.name+" "+j.year.year+" — Motor",_e(!1),ce(),de(e+"/engines?model_id="+j.model.id+"&year_id="+j.year.id).then((function(e){if(ue(),e&&e.data&&e.data.length){if(1===e.data.length){var a=e.data[0];return j.engine={id_mye:a.id_mye,name:a.name_engine+(a.trim_level?" "+a.trim_level:"")},void Te()}p.className="nav-grid",p.innerHTML=e.data.map((function(e){var a=e.name_engine+(e.trim_level?" — "+e.trim_level:"");return'<div class="nav-card" role="listitem" data-mye-id="'+e.id_mye+'" data-name="'+ve(a)+'"><div class="nav-card__name">'+ve(e.name_engine)+"</div>"+(e.trim_level?'<div class="nav-card__sub">'+ve(e.trim_level)+"</div>":"")+"</div>"})).join(""),p.querySelectorAll(".nav-card").forEach((function(e){e.addEventListener("click",(function(){j.engine={id_mye:parseInt(this.dataset.myeId),name:this.dataset.name},Te()}))}))}else pe("Sin motores","No hay configuraciones de motor para esta combinacion.")}))}function ke(){j.level="groups",le(),ge(),r.textContent=j.category.name,_e(!0),ce(),de(e+"/groups?mye_id="+j.engine.id_mye+"&category_id="+j.category.id).then((function(e){ue(),e&&e.data&&e.data.length?(p.className="nav-grid",p.innerHTML=e.data.map((function(e){return'<div class="nav-card" role="listitem" data-group-id="'+e.id_part_group+'" data-name="'+ve(e.name)+'"><div class="nav-card__name">'+ve(e.name)+'</div><div class="nav-card__count">'+e.part_count+" partes</div></div>"})).join(""),p.querySelectorAll(".nav-card").forEach((function(e){e.addEventListener("click",(function(){j.group={id:parseInt(this.dataset.groupId),name:this.dataset.name},j.partType=null,Ie()}))}))):pe("Sin subcategorias","No hay subcategorias para "+j.category.name)}))}function Ie(){j.level="part_types",j.partType=null,le(),ge(),r.textContent=j.group.name,_e(!0),ce(),de(e+"/part-types?mye_id="+j.engine.id_mye+"&group_id="+j.group.id).then((function(e){if(ue(),e&&e.data&&e.data.length){if(1===e.data.length){var a=e.data[0];return j.partType={slug:a.slug,name:a.name},void Me(1)}p.className="nav-grid",p.innerHTML=e.data.map((function(e){var a=e.sample_image?'<img src="'+ve(e.sample_image)+'" alt="" style="width:32px;height:32px;object-fit:contain;margin-right:8px;vertical-align:middle;" onerror="this.style.display=\'none\'">':"";return'<div class="nav-card" role="listitem" data-pt-slug="'+ve(e.slug)+'" data-pt-name="'+ve(e.name)+'"><div class="nav-card__name">'+a+ve(e.name)+'</div><div class="nav-card__count">'+e.variant_count+" variante"+(e.variant_count>1?"s":"")+"</div></div>"})).join(""),p.querySelectorAll(".nav-card").forEach((function(e){e.addEventListener("click",(function(){j.partType={slug:this.dataset.ptSlug,name:this.dataset.ptName},Me(1)}))}))}else Me(1)}))}function Te(){"local"===q?(j.level="categories",le(),ge(),r.textContent="Categorias (Local)",_e(!0),ce(),de(e+"/categories?mode=local&mye_id="+j.engine.id_mye).then((function(e){ue(),e&&e.data&&e.data.length?(p.className="nav-grid",p.innerHTML=e.data.map((function(e){return'<div class="nav-card" role="listitem" data-slug="'+ve(e.slug)+'" data-name="'+ve(e.name)+'"><div class="nav-card__name">'+ve(e.name)+'</div><div class="nav-card__count">'+e.part_count+" partes</div></div>"})).join(""),p.querySelectorAll(".nav-card").forEach((function(e){e.addEventListener("click",(function(){j.nxGroup={slug:this.dataset.slug,name:this.dataset.name},j.nxSubgroup=null,j.nxPartType=null,Se()}))}))):pe("Sin categorias Local","Ninguna parte de este vehiculo mapea al catalogo Local.")}))):(j.level="categories",le(),ge(),r.textContent="Categorias de partes",_e(!0),ce(),de(e+"/categories?mye_id="+j.engine.id_mye).then((function(e){ue(),e&&e.data&&e.data.length?(p.className="nav-grid",p.innerHTML=e.data.map((function(e){return'<div class="nav-card" role="listitem" data-cat-id="'+e.id_part_category+'" data-name="'+ve(e.name)+'"><div class="nav-card__name">'+ve(e.name)+'</div><div class="nav-card__count">'+e.part_count+" partes</div></div>"})).join(""),p.querySelectorAll(".nav-card").forEach((function(e){e.addEventListener("click",(function(){j.category={id:parseInt(this.dataset.catId),name:this.dataset.name},ke()}))}))):pe("Sin categorias","No hay partes catalogadas para este vehiculo.")})))}function Se(){j.level="groups",le(),ge(),r.textContent=j.nxGroup.name,_e(!0),ce(),de(e+"/groups?mode=local&mye_id="+j.engine.id_mye+"&category_slug="+encodeURIComponent(j.nxGroup.slug)).then((function(e){ue(),e&&e.data&&e.data.length?(p.className="nav-grid",p.innerHTML=e.data.map((function(e){return'<div class="nav-card" role="listitem" data-slug="'+ve(e.slug)+'" data-name="'+ve(e.name)+'"><div class="nav-card__name">'+ve(e.name)+'</div><div class="nav-card__count">'+e.part_count+" partes</div></div>"})).join(""),p.querySelectorAll(".nav-card").forEach((function(e){e.addEventListener("click",(function(){j.nxSubgroup={slug:this.dataset.slug,name:this.dataset.name},j.nxPartType=null,Le()}))}))):pe("Sin subcategorias","No hay subcategorias en "+j.nxGroup.name)}))}function Le(){j.level="part_types",j.nxPartType=null,le(),ge(),r.textContent=j.nxSubgroup.name,_e(!0),ce(),de(e+"/part-types?mode=local&mye_id="+j.engine.id_mye+"&group_slug="+encodeURIComponent(j.nxGroup.slug)+"&subgroup_slug="+encodeURIComponent(j.nxSubgroup.slug)).then((function(e){if(ue(),e&&e.data&&e.data.length){if(1===e.data.length){var a=e.data[0];return j.nxPartType={slug:a.slug,name:a.name},void Me(1)}p.className="nav-grid",p.innerHTML=e.data.map((function(e){var a=e.sample_image?'<img src="'+ve(e.sample_image)+'" alt="" style="width:32px;height:32px;object-fit:contain;margin-right:8px;vertical-align:middle;" onerror="this.style.display=\'none\'">':"";return'<div class="nav-card" role="listitem" data-slug="'+ve(e.slug)+'" data-name="'+ve(e.name)+'"><div class="nav-card__name">'+a+ve(e.name)+'</div><div class="nav-card__count">'+e.variant_count+" variante"+(e.variant_count>1?"s":"")+"</div></div>"})).join(""),p.querySelectorAll(".nav-card").forEach((function(e){e.addEventListener("click",(function(){j.nxPartType={slug:this.dataset.slug,name:this.dataset.name},Me(1)}))}))}else pe("Sin tipos de parte","No hay tipos de parte en "+j.nxSubgroup.name)}))}function Ce(a){j.level="parts",le(),O=a||1,ge(),r.textContent=j.nxPartType.name,_e(!1),ce(),p.innerHTML="",de(e+"/shop-supplies/parts?group_slug="+encodeURIComponent(j.nxGroup.slug)+"&subgroup_slug="+encodeURIComponent(j.nxSubgroup.slug)+"&part_type_slug="+encodeURIComponent(j.nxPartType.slug)+"&page="+O+"&per_page=30").then((function(e){ue(),e&&e.data&&e.data.length?(m.style.display="",m.innerHTML=e.data.map((function(e){var a;a=e.in_stock_network||e.bodega_count>0?'<span class="stock-badge stock-badge--bodega">'+e.bodega_count+" bodega"+(e.bodega_count>1?"s":"")+"</span>":'<span class="stock-badge stock-badge--none">Sin stock</span>';var t=e.image_url?'<img src="'+ve(e.image_url)+'" alt="'+ve(e.name)+'" loading="lazy" decoding="async">':'<svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1"><rect x="3" y="3" width="18" height="18" rx="2"/><path d="M8 7h8M8 12h8M8 17h5"/></svg>',n=1===e.priority_tier?" part-card--tier1":2===e.priority_tier?" part-card--tier2":"",o="";if(e.manufacturer){var i=1===e.priority_tier?'<span class="manu-tier">★</span>':"";o='<div class="part-card__manu"><span class="manu-name">'+ve(e.manufacturer)+"</span>"+i+"</div>"}var r=e.part_number?ve(e.part_number)+'<span class="part-card__oem-sub"> · OEM: '+ve(e.oem_part_number||"")+"</span>":ve(e.oem_part_number||"");return'<article class="part-card'+n+'" role="listitem" data-part-id="'+e.id_part+'"><div class="part-card__image">'+t+'</div><div class="part-card__body">'+o+'<div class="part-card__oem">'+r+'</div><div class="part-card__name">'+ve(e.name)+'</div></div><div class="part-card__footer"><span class="part-card__price" style="color:var(--color-text-muted);">Sin precio</span>'+a+"</div></article>"})).join(""),m.querySelectorAll(".part-card").forEach((function(e){e.addEventListener("click",(function(){var e=this.dataset.partId;"string"==typeof e&&0===e.indexOf("inv:")||we(parseInt(e))}))})),e.pagination&&Be(e.pagination)):pe("Sin partes","No hay partes en este tipo.")}))}function Me(a){var t;if(j.level="parts",le(),O=a||1,ge(),j.nxPartType?r.textContent=j.nxPartType.name:j.partType?r.textContent=j.partType.name:j.group?r.textContent=j.group.name:r.textContent="Partes",_e(!1),ce(),p.innerHTML="",j.nxGroup&&j.nxSubgroup&&j.nxPartType)t=e+"/parts?mode=local&mye_id="+j.engine.id_mye+"&page="+O+"&per_page=30&nexpart_group="+encodeURIComponent(j.nxGroup.slug)+"&nexpart_subgroup="+encodeURIComponent(j.nxSubgroup.slug)+"&nexpart_part_type="+encodeURIComponent(j.nxPartType.slug);else{var 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precio</span>')+t+"</div></article>"})).join(""),m.querySelectorAll(".part-card").forEach((function(e){e.addEventListener("click",(function(){var e=this.dataset.partId;"string"==typeof e&&0===e.indexOf("inv:")||we(parseInt(e))}))})),e.pagination&&Be(e.pagination)}else pe("Sin partes","No hay partes en este grupo.")}))}function Be(e){if(!e||e.total_pages<=1)v.innerHTML="";else{var a="";e.page<=1?a+='<button class="page-item page-item--wide is-disabled" disabled>Anterior</button>':a+='<button class="page-item page-item--wide" data-page="'+(e.page-1)+'">Anterior</button>',function(e,a){if(a<=7){for(var t=[],n=1;n<=a;n++)t.push(n);return t}var o=[1];e>3&&o.push("...");for(var i=Math.max(2,e-1);i<=Math.min(a-1,e+1);i++)o.push(i);e<a-2&&o.push("...");return o.push(a),o}(e.page,e.total_pages).forEach((function(t){"..."===t?a+='<span style="padding:0 4px;color:var(--color-text-muted);">...</span>':t===e.page?a+='<button class="page-item is-active">'+t+"</button>":a+='<button class="page-item" data-page="'+t+'">'+t+"</button>"})),e.page>=e.total_pages?a+='<button class="page-item page-item--wide is-disabled" disabled>Siguiente</button>':a+='<button class="page-item page-item--wide" data-page="'+(e.page+1)+'">Siguiente</button>',v.innerHTML=a,v.querySelectorAll("[data-page]").forEach((function(e){e.addEventListener("click",(function(){g.scrollTo({top:0,behavior:"smooth"}),Me(parseInt(this.dataset.page))}))}))}}function we(a){_.innerHTML='<div class="loading is-visible"><div class="spinner"></div></div>',h.style.display="none",y.classList.add("is-open"),f.classList.add("is-visible"),U=1,k.textContent="1",de(e+"/part/"+a).then((function(e){if(e&&!e.error){G=e;var a=e.part,t=e.local,n=e.bodegas||[],o=e.alternatives||[],i="";i+='<div class="detail-section">',a.category_name&&(i+='<div style="font-size:var(--text-caption);color:var(--color-text-muted);margin-bottom:var(--space-1);">'+ve(a.category_name)+" > "+ve(a.group_name)+"</div>"),i+='<div 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class="stock-row"><span class="stock-label">Precio taller</span><span class="stock-value">$'+me(t.price_3)+"</span></div>"),t.location&&(i+='<div class="stock-row"><span class="stock-label">Ubicacion</span><span class="stock-value">'+ve(t.location)+"</span></div>")):i+='<div style="color:var(--color-text-muted);font-size:var(--text-body-sm);">No tienes esta parte en inventario.</div>',i+="</div>",n.length&&(i+='<div class="detail-section">',i+='<div class="detail-section__title">Disponible en bodegas</div>',i+='<table class="bodega-table"><thead><tr><th>Bodega</th><th>Precio</th><th>Stock</th></tr></thead><tbody>',n.forEach((function(e){i+="<tr><td>"+ve(e.business_name)+"</td><td>"+(e.price?"$"+me(e.price):"--")+"</td><td>"+e.stock+"</td></tr>"})),i+="</tbody></table></div>"),o.length&&(i+='<div class="detail-section">',i+='<div class="detail-section__title">Alternativas / Cross-references</div>',o.forEach((function(e){var a=e.local_stock>0?'<span class="stock-badge stock-badge--local">Stock: '+e.local_stock+"</span>":e.bodega_count>0?'<span class="stock-badge stock-badge--bodega">'+e.bodega_count+" bod.</span>":"";i+='<div class="alt-item"><div><div class="alt-item__pn">'+ve(e.part_number)+'</div><div class="alt-item__mfr">'+ve(e.manufacturer)+(e.name?" — "+ve(e.name):"")+'</div></div><div class="alt-item__stock">'+a+"</div></div>"})),i+="</div>"),_.innerHTML=i,t&&t.stock>0?h.style.display="":h.style.display="none"}else _.innerHTML='<p style="color:var(--color-error);padding:var(--space-4);">Error al cargar detalle.</p>'}))}function Ne(){y.classList.remove("is-open"),f.classList.remove("is-visible"),G=null}function Ae(e){if(!e)return"keyword";var a=e.trim(),t=a.replace(/[\s\-]/g,"").toUpperCase();if(/^[A-HJ-NPR-Z0-9]{17}$/.test(t))return"vin";if(/^[A-Z]{3}[-\s]?\d{3,4}$/.test(a.toUpperCase()))return"plate";if(/[a-z]/.test(a))return"keyword";var n=a.split(/\s+/);if(n.some((function(e){return/^(19|20)\d{2}$/.test(e)}))&&n.length>1)return"keyword";var o=a.toUpperCase();return/^[A-Z0-9]{2,}[\-\/][A-Z0-9]{2,}([\-\/][A-Z0-9]+)*$/.test(o)&&t.length>=6||n.length>=2&&n.every((function(e){return/^[A-Z0-9]{1,}$/.test(e)}))&&t.length>=6||/^[A-Z0-9]{8,}$/.test(t)&&/[A-Z]/.test(t)&&/\d/.test(t)?"part_number":"keyword"}function He(e){var a=J||((J=document.createElement("div")).id="searchHint",J.style.cssText="position:absolute;top:100%;left:0;margin-top:4px;padding:3px 10px;background:var(--color-primary-muted);color:var(--color-text-accent);font-size:var(--text-caption);font-weight:var(--font-weight-semibold);border:1px dashed var(--color-border-accent);border-radius:var(--radius-sm);white-space:nowrap;pointer-events:none;z-index:10;display:none;",o.parentElement.appendChild(J),J),t={vin:"🚗 VIN detectado — decodificando",plate:"🔖 Placa detectada — consultando registro",part_number:"🔩 Numero de parte 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\ No newline at end of file
diff --git a/pos/static/js/chat.min.js b/pos/static/js/chat.min.js
deleted file mode 100644
index 15a8217..0000000
--- a/pos/static/js/chat.min.js
+++ /dev/null
@@ -1 +0,0 @@
-!function(){"use strict";let e=!1,t=!1,n=!1,a=null,s=!0,c=null;const i=[],o="webkitSpeechRecognition"in window||"SpeechRecognition"in window,r="speechSynthesis"in window;function l(){const e=document.createElement("button");e.className="chat-fab",e.id="chatFab",e.title="Asistente IA",e.innerHTML="&#x1F4AC;",e.setAttribute("aria-label","Abrir asistente IA");const t=document.createElement("div");t.className="chat-panel",t.id="chatPanel",t.innerHTML=`\n      <div class="chat-header">\n        <h3>Asistente IA — Buscar partes</h3>\n        <div class="chat-header-actions">\n          ${r?'<button class="chat-tts-toggle" id="chatTtsToggle" aria-label="Activar lectura de respuestas" title="Activar lectura de respuestas">&#128266;</button>':""}\n          <button class="chat-header-close" id="chatClose" aria-label="Cerrar">&times;</button>\n        </div>\n      </div>\n      <div class="chat-messages" id="chatMessages">\n        <div class="chat-msg ai">Hola, soy el asistente de Nexus. Dime que refaccion necesitas y te ayudo a encontrarla.</div>\n        <div class="chat-typing" id="chatTyping">\n          <span></span><span></span><span></span>\n        </div>\n      </div>\n      <div class="chat-input-area">\n        <textarea class="chat-input" id="chatInput" placeholder="Ej: Balatas para Tsuru 2015..." rows="1"></textarea>\n        <input type="file" id="chatImageInput" accept="image/*" capture="environment" style="display:none;">\n        <button class="chat-cam-btn" id="chatCam" aria-label="Enviar foto de parte" title="Identificar parte por foto">&#128247;</button>\n        ${o?'<button class="chat-mic-btn" id="chatMic" aria-label="Entrada por voz" title="Entrada por voz">&#127908;</button>':""}\n        <button class="chat-send-btn" id="chatSend" aria-label="Enviar">&#9654;</button>\n      </div>\n    `,document.body.appendChild(e),document.body.appendChild(t),e.addEventListener("click",p),document.getElementById("chatClose").addEventListener("click",p),document.getElementById("chatSend").addEventListener("click",y),document.getElementById("chatInput").addEventListener("keydown",(function(e){"Enter"!==e.key||e.shiftKey||(e.preventDefault(),y())})),document.getElementById("chatCam").addEventListener("click",(function(){document.getElementById("chatImageInput").click()})),document.getElementById("chatImageInput").addEventListener("change",h),o&&document.getElementById("chatMic").addEventListener("click",d),r&&document.getElementById("chatTtsToggle").addEventListener("click",u),document.getElementById("chatClose").addEventListener("click",(function(){r&&m()})),document.getElementById("chatInput").addEventListener("input",(function(){this.style.height="auto",this.style.height=Math.min(this.scrollHeight,80)+"px"}))}function d(){n?function(){a&&(a.abort(),a=null);n=!1;const e=document.getElementById("chatMic");e&&e.classList.remove("listening")}():function(){const e=window.SpeechRecognition||window.webkitSpeechRecognition;if(!e)return;a=new e,a.lang="es-MX",a.continuous=!1,a.interimResults=!0;const t=document.getElementById("chatInput"),s=document.getElementById("chatMic"),c=t.placeholder;a.onstart=function(){n=!0,s.classList.add("listening"),t.placeholder="Escuchando...",t.value=""},a.onresult=function(e){let n="",a="";for(let t=e.resultIndex;t<e.results.length;t++)e.results[t].isFinal?a+=e.results[t][0].transcript:n+=e.results[t][0].transcript;t.value=a||n},a.onend=function(){n=!1,s.classList.remove("listening"),t.placeholder=c,a=null,t.value.trim()&&y()},a.onerror=function(e){n=!1,s.classList.remove("listening"),t.placeholder=c,a=null,"no-speech"!==e.error&&"audio-capture"!==e.error&&"not-allowed"!==e.error||function(e){const t=document.createElement("div");t.className="chat-voice-toast",t.textContent=e,document.body.appendChild(t),setTimeout((function(){t.classList.add("visible")}),10),setTimeout((function(){t.classList.remove("visible"),setTimeout((function(){t.remove()}),300)}),2e3)}("No se detecto voz")},a.start()}()}function u(){s=!s;const e=document.getElementById("chatTtsToggle");e&&(e.classList.toggle("off",!s),e.setAttribute("title",s?"Desactivar lectura de respuestas":"Activar lectura de respuestas")),s||m()}function m(){r&&window.speechSynthesis.speaking&&window.speechSynthesis.cancel(),c=null}function h(e){const n=e.target.files&&e.target.files[0];if(!n)return;if(e.target.value="",!n.type.startsWith("image/"))return void f("Solo se permiten imagenes.","ai");if(n.size>5242880)return void f("La imagen es muy grande (max 5MB).","ai");const a=new FileReader;a.onload=function(e){const n=document.getElementById("chatMessages"),a=document.getElementById("chatTyping"),s=document.createElement("div");s.className="chat-msg user chat-msg-image",s.innerHTML='<img src="'+e.target.result+'" alt="Foto de parte" style="max-width:180px;max-height:140px;border-radius:8px;display:block;margin-bottom:4px;"><span>Identificar esta parte</span>',n.insertBefore(s,a),I();var c=e.target.result,o="Identifica esta parte automotriz y sugiere terminos de busqueda.";i.push({role:"user",content:o}),i.length>20&&i.splice(0,2),t=!0,document.getElementById("chatSend").disabled=!0,b(!0);var r=g();fetch("/pos/api/chat",{method:"POST",headers:{"Content-Type":"application/json",Authorization:"Bearer "+r},body:JSON.stringify({message:o,image:c,history:i.slice(-10)})}).then((function(e){return e.json()})).then((function(e){const t=e.response||"No pude identificar la parte. Intenta describirla con texto.";f(t,"ai"),i.push({role:"assistant",content:t}),e.vehicle&&e.vehicle.brand_id&&v(e.vehicle),e.search_results&&e.search_results.length>0&&E(e.search_results)})).catch((function(e){f("Error al procesar imagen: "+e.message,"ai")})).finally((function(){t=!1,document.getElementById("chatSend").disabled=!1,b(!1)}))},a.readAsDataURL(n)}function p(){e=!e;const t=document.getElementById("chatPanel"),n=document.getElementById("chatFab");e?(t.classList.add("open"),n.style.display="none",document.getElementById("chatInput").focus()):(t.classList.remove("open"),n.style.display="flex")}function g(){return window.__pos&&window.__pos.token?window.__pos.token:localStorage.getItem("pos_token")||""}async function y(){if(t)return;const e=document.getElementById("chatInput"),n=e.value.trim();if(n){e.value="",e.style.height="auto",f(n,"user"),i.push({role:"user",content:n}),i.length>20&&i.splice(0,2),t=!0,document.getElementById("chatSend").disabled=!0,b(!0);try{const e=g(),t=await fetch("/pos/api/chat",{method:"POST",headers:{"Content-Type":"application/json",Authorization:"Bearer "+e},body:JSON.stringify({message:n,history:i.slice(-10)})}),a=await t.json();if(!t.ok)return void f("Error: "+(a.error||t.statusText),"ai");const o=a.response||"Sin respuesta.";f(o,"ai"),i.push({role:"assistant",content:o}),function(e){r&&s&&e&&(m(),c=new SpeechSynthesisUtterance(e),c.lang="es-MX",c.rate=1.1,c.pitch=1,window.speechSynthesis.speak(c))}(o),a.vehicle&&a.vehicle.brand_id&&v(a.vehicle),a.search_results&&a.search_results.length>0&&E(a.search_results)}catch(e){f("Error de conexion: "+e.message,"ai")}finally{t=!1,document.getElementById("chatSend").disabled=!1,b(!1)}}}function f(e,t){const n=document.getElementById("chatMessages"),a=document.getElementById("chatTyping"),s=document.createElement("div");s.className="chat-msg "+t,s.textContent=e,n.insertBefore(s,a),I()}function v(e){const t=document.getElementById("chatMessages"),n=document.getElementById("chatTyping"),a=document.createElement("div");a.className="chat-vehicle-banner";let s="<strong>"+B(e.brand||"")+" "+B(e.model||"")+"</strong>";e.year&&(s+=" "+e.year),e.mye_options&&e.mye_options.length>0&&(s+="<br>Motorizaciones encontradas:",e.mye_options.forEach((function(e){s+="<br>&bull; "+B(e.engine),e.trim&&(s+=" ("+B(e.trim)+")")}))),a.innerHTML=s,t.insertBefore(a,n),I()}function E(e){const t=document.getElementById("chatMessages"),n=document.getElementById("chatTyping"),a=document.createElement("div");a.className="chat-parts",e.slice(0,8).forEach((function(e){const t=document.createElement("div");t.className="chat-part-card";const n="local"===e.source,s=e.local_stock||0,c=s>0?"in-stock":"",i=s>0?s+" en stock":"Sin stock local",o=e.name_es||e.name_part||"",r=e.oem_part_number||e.part_number||"",l=e.brand||"",d=e.price_1?"$"+parseFloat(e.price_1).toFixed(2):"",u=n?'<span style="background:var(--color-success);color:#fff;padding:1px 6px;border-radius:4px;font-size:0.65rem;margin-left:6px;">MI INVENTARIO</span>':'<span style="background:var(--color-primary);color:#fff;padding:1px 6px;border-radius:4px;font-size:0.65rem;margin-left:6px;">CATÁLOGO</span>';t.innerHTML='<div class="part-number">'+B(r)+u+(d?" &mdash; "+d:"")+'</div><div class="part-name">'+B(o)+(l?' <span style="color:var(--color-text-muted);">('+B(l)+")</span>":"")+'</div><div class="part-stock '+c+'">'+B(i)+"</div>",t.addEventListener("click",(function(){e.id_part&&"function"==typeof window.openPartDetail&&(window.openPartDetail(e.id_part),p())})),a.appendChild(t)})),t.insertBefore(a,n),I()}function b(e){const t=document.getElementById("chatTyping");t&&t.classList.toggle("visible",e),e&&I()}function I(){const e=document.getElementById("chatMessages");e&&(e.scrollTop=e.scrollHeight)}function B(e){const t=document.createElement("div");return t.textContent=e,t.innerHTML}"loading"===document.readyState?document.addEventListener("DOMContentLoaded",l):l()}();
\ No newline at end of file
diff --git a/pos/static/js/config.js b/pos/static/js/config.js
index 134f157..ad51fca 100644
--- a/pos/static/js/config.js
+++ b/pos/static/js/config.js
@@ -19,6 +19,11 @@ const Config = (() => {
         return true;
     }
 
+    function escapeHtml(text) {
+        if (!text) return '';
+        return String(text).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;');
+    }
+
     function headers() {
         return { 'Authorization': `Bearer ${token()}`, 'Content-Type': 'application/json' };
     }
@@ -623,6 +628,67 @@ const Config = (() => {
         }
     }
 
+    // -------------------------------------------------------------------------
+    // Allowed Part Brands
+    // -------------------------------------------------------------------------
+    async function loadAllowedBrands() {
+        var container = document.getElementById('allowed-brands-container');
+        if (!container) return;
+        try {
+            var res = await fetch(API + '/available-brands', { headers: headers() });
+            if (!res.ok) throw new Error('Failed to load brands');
+            var d = await res.json();
+            var allBrands = d.brands || [];
+
+            var res2 = await fetch(API + '/allowed-brands', { headers: headers() });
+            if (!res2.ok) throw new Error('Failed to load allowed brands');
+            var d2 = await res2.json();
+            var allowed = d2.brands || [];
+
+            if (!allBrands.length) {
+                container.innerHTML = '<p style="color:var(--color-text-muted);font-size:var(--text-body-sm);">No hay marcas disponibles.</p>';
+                return;
+            }
+
+            var html = '';
+            allBrands.forEach(function(b) {
+                var checked = allowed.indexOf(b) !== -1 ? 'checked' : '';
+                html += '<label style="display:flex;align-items:center;gap:var(--space-2);cursor:pointer;font-size:var(--text-body-sm);color:var(--color-text-primary);padding:var(--space-1);">' +
+                    '<input type="checkbox" value="' + escapeHtml(b) + '" data-brand-checkbox ' + checked + ' style="width:16px;height:16px;cursor:pointer;">' +
+                    escapeHtml(b) + '</label>';
+            });
+            container.innerHTML = html;
+        } catch (e) {
+            console.error('Config.loadAllowedBrands:', e);
+            if (container) container.innerHTML = '<p style="color:var(--color-error);font-size:var(--text-body-sm);">Error al cargar marcas.</p>';
+        }
+    }
+
+    async function saveAllowedBrands() {
+        var btn = document.getElementById('btn-save-allowed-brands');
+        if (btn) { btn.disabled = true; btn.textContent = 'Guardando...'; }
+        try {
+            var checked = [];
+            document.querySelectorAll('[data-brand-checkbox]').forEach(function(cb) {
+                if (cb.checked) checked.push(cb.value);
+            });
+            var res = await fetch(API + '/allowed-brands', {
+                method: 'PUT',
+                headers: headers(),
+                body: JSON.stringify({ brands: checked })
+            });
+            if (!res.ok) {
+                var err = await res.json().catch(function() { return { error: res.statusText }; });
+                throw new Error(err.error || 'Save failed');
+            }
+            toast('Marcas permitidas actualizadas');
+        } catch (e) {
+            toast(e.message, 'error');
+        } finally {
+            if (btn) { btn.disabled = false; btn.textContent = 'Guardar Marcas'; }
+        }
+    }
+
     // -------------------------------------------------------------------------
     // Init
     // -------------------------------------------------------------------------
@@ -650,6 +716,12 @@ const Config = (() => {
             btnCompat.addEventListener('click', saveVehicleCompatSource);
         }
 
+        // Allowed brands save button
+        var btnBrands = document.getElementById('btn-save-allowed-brands');
+        if (btnBrands) {
+            btnBrands.addEventListener('click', saveAllowedBrands);
+        }
+
         // Kiosk mode toggle
         var kioskToggle = document.getElementById('cfg-kiosk-mode');
         if (kioskToggle && window.NexusKiosk) {
@@ -671,12 +743,13 @@ const Config = (() => {
         loadBusiness();
         loadCurrency();
         loadVehicleCompatSource();
+        loadAllowedBrands();
     }
 
     document.addEventListener('DOMContentLoaded', init);
 
     return {
-        init, setTheme, selectThemeOption,
+        init, setTheme, selectThemeOption, loadAllowedBrands, saveAllowedBrands,
         loadBranches, loadEmployees, saveBranch, saveEmployee, editEmployee,
         loadBusiness, saveBusiness, saveTaxParams,
         loadCurrency, saveCurrency,
diff --git a/pos/static/js/config.min.js b/pos/static/js/config.min.js
deleted file mode 100644
index ea4814b..0000000
--- a/pos/static/js/config.min.js
+++ /dev/null
@@ -1 +0,0 @@
-const Config=(()=>{const e="/pos/api/config";let t=[];function a(){return localStorage.getItem("pos_token")||""}function n(){return!!a()||(window.location.href="/pos/login",!1)}function r(){return{Authorization:`Bearer ${a()}`,"Content-Type":"application/json"}}function o(e,t){var a=document.createElement("div");a.className="cfg-toast cfg-toast--"+(t||"ok"),a.textContent=e,document.body.appendChild(a),setTimeout((function(){a.remove()}),3e3)}function c(e){var t=document.getElementById(e);t&&(t.style.display="flex")}function d(e){var t=document.getElementById(e);t&&(t.style.display="none")}function i(e){document.documentElement.setAttribute("data-theme",e);try{localStorage.setItem("nexus-theme",e)}catch(e){}document.querySelectorAll(".theme-btn").forEach((function(t){t.classList.toggle("is-active",t.dataset.themeTarget===e)})),document.querySelectorAll(".theme-option").forEach((function(e){e.classList.remove("is-selected")}));var t="industrial"===e?0:1,a=document.querySelectorAll(".theme-option");a[t]&&a[t].classList.add("is-selected")}function s(e){i(e)}function l(){var e=new Date,t=String(e.getHours()).padStart(2,"0"),a=String(e.getMinutes()).padStart(2,"0"),n=document.getElementById("live-clock");n&&(n.textContent=t+":"+a)}window.setTheme=i,window.selectThemeOption=s;var u={owner:"Dueno",admin:"Admin",cashier:"Cajero",warehouse:"Almacenista",accountant:"Contador"},m={owner:"badge--owner",admin:"badge--blue",cashier:"badge--green",warehouse:"badge--yellow",accountant:"badge--purple"};function v(e){if(!e)return"";var t=document.createElement("div");return t.textContent=e,t.innerHTML}async function y(){var a=document.getElementById("branches-grid");if(!a)return[];try{var n=await fetch(e+"/branches",{headers:r()});if(!n.ok)throw new Error("Failed");var o=await n.json();t=o.data||[]}catch(e){return console.error("Config.loadBranches:",e),t=[],a.innerHTML='<div class="device-card"><div class="device-card__body" style="text-align:center;color:var(--color-error,red);">Error al cargar sucursales</div></div>',t}return function(){var e=document.getElementById("branches-grid");if(!e)return;var a="";t.forEach((function(e,t){var n=e.is_active?'<span class="badge badge--ok" style="padding:0 4px;font-size:0.625rem;">'+(0===t?"Principal":"Activa")+"</span>":'<span class="badge badge--inactive" style="padding:0 4px;font-size:0.625rem;">Inactiva</span>';a+='<div class="device-card"><div class="device-card__icon"><svg viewBox="0 0 24 24"><path d="M3 9l9-7 9 7v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z"/><polyline points="9 22 9 12 15 12 15 22"/></svg></div><div class="device-card__body"><div class="device-card__name">'+v(e.name)+'</div><div class="device-card__detail">'+n+"</div>"+(e.address?'<div class="device-card__detail">'+v(e.address)+"</div>":"")+(e.phone?'<div class="device-card__detail">'+v(e.phone)+"</div>":"")+"</div></div>"})),a+='<div class="device-card" style="border-style:dashed;cursor:pointer;" onclick="Config.openModal(\'modal-branch\')"><div class="device-card__icon" style="background:transparent;border:2px dashed var(--color-border);"><svg viewBox="0 0 24 24" style="stroke:var(--color-text-muted);"><line x1="12" y1="5" x2="12" y2="19"/><line x1="5" y1="12" x2="19" y2="12"/></svg></div><div class="device-card__body"><div class="device-card__name" style="color:var(--color-text-muted);">Agregar Sucursal</div><div class="device-card__detail">Configura una nueva ubicacion</div></div></div>',e.innerHTML=a}(),function(){var e=document.getElementById("emp-branch");if(!e)return;e.innerHTML='<option value="">-- Todas --</option>',t.forEach((function(t){if(t.is_active){var a=document.createElement("option");a.value=t.id,a.textContent=t.name,e.appendChild(a)}}))}(),t}async function g(t){var a=await fetch(e+"/branches",{method:"POST",headers:r(),body:JSON.stringify(t)});if(!a.ok){var n=await a.json().catch((function(){return{error:a.statusText}}));throw new Error(n.error||"Save failed")}return a.json()}async function f(){var t=document.getElementById("employees-tbody"),a=document.getElementById("employees-count");if(!t)return[];var n=[];try{var o=await fetch(e+"/employees",{headers:r()});if(!o.ok)throw new Error("Failed");n=(await o.json()).data||[]}catch(e){return console.error("Config.loadEmployees:",e),t.innerHTML='<tr><td colspan="7" style="text-align:center;padding:var(--space-5);color:var(--color-error,red);">Error al cargar empleados</td></tr>',[]}var c=n.filter((function(e){return e.is_active})).length;if(a&&(a.textContent=c+" empleado"+(1!==c?"s":"")+" activo"+(1!==c?"s":"")),0===n.length)return t.innerHTML='<tr><td colspan="7" style="text-align:center;padding:var(--space-5);color:var(--color-text-muted);">Sin empleados registrados</td></tr>',n;var d="";return n.forEach((function(e){var t,a=function(e){if(!e)return"??";var t=e.trim().split(/\s+/);return t.length>=2?(t[0][0]+t[t.length-1][0]).toUpperCase():t[0].substring(0,2).toUpperCase()}(e.name),n=e.is_active?'<span class="badge badge--ok">Activo</span>':'<span class="badge badge--inactive">Inactivo</span>';d+='<tr><td><div class="user-cell"><div class="user-cell__avatar">'+a+'</div><span class="user-cell__name">'+v(e.name)+"</span></div></td><td>"+v(e.email||"-")+"</td><td>"+(t=e.role,'<span class="badge '+(m[t]||"badge--ok")+'">'+v(u[t]||t)+"</span></td><td>")+v(e.branch_name||"Todas")+"</td><td>"+n+"</td><td>"+(e.max_discount_pct||0)+'%</td><td><button class="btn btn--ghost btn--sm" onclick="Config.editEmployee('+e.id+')">Editar</button></td></tr>'})),t.innerHTML=d,n}async function p(t){var a=document.getElementById("employee-modal"),n=a?a.dataset.editId:null,o=e+"/employees",c="POST";n&&(o=e+"/employees/"+n,c="PUT",delete a.dataset.editId);var d=await fetch(o,{method:c,headers:r(),body:JSON.stringify(t)});if(!d.ok){var i=await d.json().catch((function(){return{error:d.statusText}}));throw new Error(i.error||"Save failed")}return d.json()}async function h(){try{var t=await fetch(e+"/business",{headers:r()});if(!t.ok)return;var a=await t.json();b("biz-razon-social",a.razon_social),b("biz-nombre",a.nombre),b("biz-rfc",a.rfc),b("biz-regimen",a.regimen_fiscal),b("biz-direccion",a.direccion),b("biz-telefono",a.telefono),b("biz-email",a.email)}catch(e){console.error("Config.loadBusiness:",e)}}function b(e,t){var a=document.getElementById(e);a&&(a.value=t||"")}function E(e){var t=document.getElementById(e);return t?t.value.trim():""}async function w(){try{var t=await fetch(e+"/currency",{headers:r()});if(!t.ok)return;var a=await t.json(),n=document.getElementById("cfg-currency"),o=document.getElementById("cfg-exchange-rate");n&&(n.value=a.currency||"MXN"),o&&(o.value=a.exchange_rate||17.5),localStorage.setItem("pos_currency",a.currency||"MXN"),localStorage.setItem("pos_exchange_rate",a.exchange_rate||17.5)}catch(e){console.error("Config.loadCurrency:",e)}}async function I(){var t=document.getElementById("cfg-compat-source"),a=document.getElementById("btn-save-compat-source");if(t){a&&(a.disabled=!0,a.textContent="Guardando...");try{var n=await fetch(e+"/vehicle-compat-source",{method:"PUT",headers:r(),body:JSON.stringify({source:t.value})});if(!n.ok){var c=await n.json().catch((function(){return{error:n.statusText}}));throw new Error(c.error||"Save failed")}o("Fuente de compatibilidad actualizada")}catch(e){o(e.message,"error")}finally{a&&(a.disabled=!1,a.textContent="Guardar")}}}function x(){if(n()){try{var t=localStorage.getItem("nexus-theme");"industrial"!==t&&"modern"!==t||i(t)}catch(e){}l(),setInterval(l,3e4),function(){document.querySelector("#branches-grid");var e=document.getElementById("btn-save-branch");e&&e.addEventListener("click",(async function(){var t=document.getElementById("branch-name").value.trim();if(t){e.disabled=!0,e.textContent="Guardando...";try{await g({name:t,address:document.getElementById("branch-address").value.trim(),phone:document.getElementById("branch-phone").value.trim()}),o("Sucursal creada"),d("modal-branch"),document.getElementById("branch-name").value="",document.getElementById("branch-address").value="",document.getElementById("branch-phone").value="",await y()}catch(e){o(e.message,"error")}finally{e.disabled=!1,e.textContent="Guardar Sucursal"}}else o("Nombre de sucursal requerido","error")}));var t=document.getElementById("btn-new-employee");t&&t.addEventListener("click",(function(){c("modal-employee")}));var a=document.getElementById("btn-save-employee");a&&a.addEventListener("click",(async function(){var e=document.getElementById("emp-name").value.trim(),t=document.getElementById("emp-role").value,n=document.getElementById("emp-pin").value.trim();if(e)if(t)if(n&&4===n.length&&/^\d{4}$/.test(n)){var r=document.getElementById("emp-branch").value;a.disabled=!0,a.textContent="Guardando...";try{await p({name:e,email:document.getElementById("emp-email").value.trim()||null,phone:document.getElementById("emp-phone").value.trim()||null,role:t,pin:n,branch_id:r?parseInt(r,10):null,max_discount_pct:parseFloat(document.getElementById("emp-discount").value)||0}),o("Empleado creado"),d("modal-employee"),document.getElementById("emp-name").value="",document.getElementById("emp-email").value="",document.getElementById("emp-phone").value="",document.getElementById("emp-role").value="",document.getElementById("emp-pin").value="",document.getElementById("emp-branch").value="",document.getElementById("emp-discount").value="0",await f()}catch(e){o(e.message,"error")}finally{a.disabled=!1,a.textContent="Guardar Empleado"}}else o("PIN debe ser 4 digitos","error");else o("Selecciona un rol","error");else o("Nombre requerido","error")})),document.querySelectorAll(".cfg-modal-overlay").forEach((function(e){e.addEventListener("click",(function(t){t.target===e&&(e.style.display="none")}))})),document.addEventListener("keydown",(function(e){"Escape"===e.key&&document.querySelectorAll(".cfg-modal-overlay").forEach((function(e){e.style.display="none"}))}))}();var a=document.getElementById("btn-save-compat-source");a&&a.addEventListener("click",I);var s=document.getElementById("cfg-kiosk-mode");s&&window.NexusKiosk&&(s.checked=window.NexusKiosk.isEnabled(),s.addEventListener("change",(function(){this.checked?(window.NexusKiosk.enable(),o("Modo Kiosko activado")):(window.NexusKiosk.disable(),o("Modo Kiosko desactivado"))}))),y(),f(),h(),w(),async function(){try{var t=await fetch(e+"/vehicle-compat-source",{headers:r()});if(!t.ok)return;var a=await t.json(),n=document.getElementById("cfg-compat-source");n&&(n.value=a.source||"both")}catch(e){console.error("Config.loadVehicleCompatSource:",e)}}()}}return document.addEventListener("DOMContentLoaded",x),{init:x,setTheme:i,selectThemeOption:s,loadBranches:y,loadEmployees:f,saveBranch:g,saveEmployee:p,editEmployee:async function(t){if(n())try{var a=await fetch(e+"/employees",{headers:r()});if(!a.ok)throw new Error("Failed to load employees");var d=((await a.json()).data||[]).find((function(e){return e.id===t}));if(!d)return void o("Empleado no encontrado","error");b("new-emp-name",d.name),b("new-emp-email",d.email||"");var i=document.getElementById("new-emp-role");i&&(i.value=d.role||"cashier");var s=document.getElementById("new-emp-branch");s&&(s.value=d.branch_id||""),b("new-emp-discount",d.max_discount_pct||""),b("new-emp-pin","");var l=document.getElementById("employee-modal");if(l){l.dataset.editId=t;var u=l.querySelector(".modal-title, h3");u&&(u.textContent="Editar Empleado")}c("employee-modal")}catch(e){o("Error: "+e.message,"error")}},loadBusiness:h,saveBusiness:async function(){if(n()){var t={razon_social:E("biz-razon-social"),nombre:E("biz-nombre"),rfc:E("biz-rfc"),regimen_fiscal:E("biz-regimen"),direccion:E("biz-direccion"),telefono:E("biz-telefono"),email:E("biz-email")};try{var a=await fetch(e+"/business",{method:"PUT",headers:r(),body:JSON.stringify(t)});if(!a.ok){var c=await a.json().catch((function(){return{error:a.statusText}}));throw new Error(c.error||"Error al guardar")}o("Datos de empresa guardados","ok")}catch(e){o(e.message,"error")}}},saveTaxParams:async function(){if(n()){var t={tax_iva:E("tax-iva")||"16",tax_ieps:E("tax-ieps")||"0",invoice_serie:E("tax-serie")||"FA",invoice_folio:E("tax-folio")||"1",default_currency:document.getElementById("tax-moneda")?document.getElementById("tax-moneda").value:"MXN",default_payment_method:document.getElementById("tax-forma-pago")?document.getElementById("tax-forma-pago").value:"01"};try{if(!(await fetch(e+"/business",{method:"PUT",headers:r(),body:JSON.stringify(t)})).ok)throw new Error("Error al guardar");o("Parámetros de impuestos guardados","ok")}catch(e){o(e.message,"error")}}},loadCurrency:w,saveCurrency:async function(){var t=document.getElementById("cfg-currency"),a=document.getElementById("cfg-exchange-rate"),n=document.getElementById("currency-status"),c=document.getElementById("btn-save-currency");if(t&&a){var d=t.value,i=parseFloat(a.value);if(!i||i<=0)o("Tipo de cambio invalido","error");else{c&&(c.disabled=!0,c.textContent="Guardando...");try{var s=await fetch(e+"/currency",{method:"PUT",headers:r(),body:JSON.stringify({currency:d,exchange_rate:i})});if(!s.ok){var l=await s.json().catch((function(){return{error:s.statusText}}));throw new Error(l.error||"Save failed")}localStorage.setItem("pos_currency",d),localStorage.setItem("pos_exchange_rate",i),o("Moneda actualizada"),n&&(n.textContent=d+" — TC: "+i)}catch(e){o(e.message,"error")}finally{c&&(c.disabled=!1,c.textContent="Guardar Moneda")}}}},openModal:c,closeModal:d}})();
\ No newline at end of file
diff --git a/pos/static/js/customers.js b/pos/static/js/customers.js
index 4cd24d4..295cf54 100644
--- a/pos/static/js/customers.js
+++ b/pos/static/js/customers.js
@@ -104,7 +104,7 @@ const Customers = (() => {
         const creditClass = usedPct >= 80 ? 'none' : usedPct >= 60 ? 'low' : '';
         const num = String(c.id).padStart(5, '0');
         const selClass = (currentCustomer && currentCustomer.id === c.id) ? 'selected' : '';
-        return '<tr class="' + selClass + '" onclick="selectCustomer(' + c.id + ')">' +
+        return '<tr class="' + selClass + '" onclick="Customers.selectCustomer(' + c.id + ')">' +
             '<td class="cell-num">' + num + '</td>' +
             '<td>' +
                 '<div class="cell-name">' + (c.name || '') + '</div>' +
@@ -263,6 +263,13 @@ const Customers = (() => {
                 bar.className = `progress-bar__fill ${pct < 40 ? 'low' : pct > 75 ? 'high' : ''}`;
             }
 
+            // Discount
+            const discountEl = document.getElementById('detailMaxDiscount');
+            if (discountEl) discountEl.textContent = (c.max_discount_pct || 0) + '%';
+
+            // Re-wire action buttons after detail panel is visible
+            wireActionButtons();
+
             // Purchase History
             const hbody = document.getElementById('historyBody');
             if (hbody) {
@@ -363,7 +370,7 @@ const Customers = (() => {
         const btns = document.querySelectorAll('.quick-actions .action-btn');
         // Order: Nueva Venta, Editar, Estado de Cuenta, Historial
         if (btns.length >= 1) btns[0].onclick = () => {
-            if (currentCustomer) window.location.href = '/pos/?customer=' + currentCustomer.id;
+            if (currentCustomer) window.location.href = '/pos/sale?customer=' + currentCustomer.id;
         };
         if (btns.length >= 2) btns[1].onclick = () => editCurrent();
         if (btns.length >= 3) btns[2].onclick = () => showStatement();
@@ -378,17 +385,19 @@ const Customers = (() => {
         if (!modal) return;
         document.getElementById('modalTitle').textContent = 'Nuevo Cliente';
         document.getElementById('editId').value = '';
-        document.getElementById('fName').value = '';
-        document.getElementById('fRfc').value = '';
-        document.getElementById('fRazonSocial').value = '';
-        document.getElementById('fRegimenFiscal').value = '';
-        document.getElementById('fUsoCfdi').value = 'G03';
-        document.getElementById('fCp').value = '';
-        document.getElementById('fPhone').value = '';
-        document.getElementById('fEmail').value = '';
-        document.getElementById('fAddress').value = '';
-        document.getElementById('fPriceTier').value = '1';
-        document.getElementById('fCreditLimit').value = '0';
+        const safeSet = (id, v) => { const el = document.getElementById(id); if (el) el.value = v; };
+        safeSet('fName', '');
+        safeSet('fRfc', '');
+        safeSet('fRazonSocial', '');
+        safeSet('fRegimenFiscal', '');
+        safeSet('fUsoCfdi', 'G03');
+        safeSet('fCp', '');
+        safeSet('fPhone', '');
+        safeSet('fEmail', '');
+        safeSet('fAddress', '');
+        safeSet('fPriceTier', '1');
+        safeSet('fCreditLimit', '0');
+        safeSet('fMaxDiscountPct', '0');
         modal.classList.add('active');
         document.getElementById('fName').focus();
     }
@@ -400,17 +409,19 @@ const Customers = (() => {
         if (!modal) return;
         document.getElementById('modalTitle').textContent = 'Editar Cliente';
         document.getElementById('editId').value = c.id;
-        document.getElementById('fName').value = c.name || '';
-        document.getElementById('fRfc').value = c.rfc || '';
-        document.getElementById('fRazonSocial').value = c.razon_social || '';
-        document.getElementById('fRegimenFiscal').value = c.regimen_fiscal || '';
-        document.getElementById('fUsoCfdi').value = c.uso_cfdi || 'G03';
-        document.getElementById('fCp').value = c.cp || '';
-        document.getElementById('fPhone').value = c.phone || '';
-        document.getElementById('fEmail').value = c.email || '';
-        document.getElementById('fAddress').value = c.address || '';
-        document.getElementById('fPriceTier').value = c.price_tier || '1';
-        document.getElementById('fCreditLimit').value = c.credit_limit || 0;
+        const safeSet = (id, v) => { const el = document.getElementById(id); if (el) el.value = v; };
+        safeSet('fName', c.name || '');
+        safeSet('fRfc', c.rfc || '');
+        safeSet('fRazonSocial', c.razon_social || '');
+        safeSet('fRegimenFiscal', c.regimen_fiscal || '');
+        safeSet('fUsoCfdi', c.uso_cfdi || 'G03');
+        safeSet('fCp', c.cp || '');
+        safeSet('fPhone', c.phone || '');
+        safeSet('fEmail', c.email || '');
+        safeSet('fAddress', c.address || '');
+        safeSet('fPriceTier', c.price_tier || '1');
+        safeSet('fCreditLimit', c.credit_limit || 0);
+        safeSet('fMaxDiscountPct', c.max_discount_pct || 0);
         modal.classList.add('active');
     }
 
@@ -438,6 +449,7 @@ const Customers = (() => {
             address: val('fAddress') || null,
             price_tier: parseInt(val('fPriceTier')) || 1,
             credit_limit: parseFloat(val('fCreditLimit')) || 0,
+            max_discount_pct: parseFloat(val('fMaxDiscountPct')) || 0,
         };
 
         const editId = val('editId');
@@ -586,7 +598,9 @@ const Customers = (() => {
 
     function injectModals() {
         // Customer Create/Edit Modal
-        if (!document.getElementById('customerModal')) {
+        // Always remove and re-inject to ensure latest fields are present
+        const existingModal = document.getElementById('customerModal');
+        if (existingModal) existingModal.remove();
             const div = document.createElement('div');
             div.innerHTML = `
             <div id="customerModal" class="modal-overlay" style="display:none;">
@@ -646,6 +660,7 @@ const Customers = (() => {
                                 </select>
                             </div>
                             <div class="form-group"><label>Limite de Credito</label><input type="number" id="fCreditLimit" class="form-input" value="0" min="0" step="1000" /></div>
+                            <div class="form-group"><label>Descuento Max (%)</label><input type="number" id="fMaxDiscountPct" class="form-input" value="0" min="0" max="100" step="0.5" /></div>
                         </div>
                     </div>
                     <div class="modal-footer">
@@ -655,9 +670,10 @@ const Customers = (() => {
                 </div>
             </div>`;
             document.body.appendChild(div);
-        }
 
         // Statement Modal
+        const existingStatement = document.getElementById('statementModal');
+        if (existingStatement) existingStatement.remove();
         if (!document.getElementById('statementModal')) {
             const div = document.createElement('div');
             div.innerHTML = `
@@ -772,11 +788,15 @@ const Customers = (() => {
     // Run init
     init();
 
-    return {
+    const publicApi = {
         search, goToPage, loadCustomers,
         showDetail, selectCustomer, closeDetail,
         showCreateModal, editCurrent, closeModal, save,
         showStatement, closeStatement,
         showPaymentModal, closePayment, recordPayment,
     };
+
+    // Expose globally for inline HTML onclick handlers
+    window.Customers = publicApi;
+    return publicApi;
 })();
diff --git a/pos/static/js/customers.min.js b/pos/static/js/customers.min.js
deleted file mode 100644
index 4bbc9b2..0000000
--- a/pos/static/js/customers.min.js
+++ /dev/null
@@ -1 +0,0 @@
-const Customers=(()=>{let e=localStorage.getItem("pos_token")||"",t=1,n=1,o=null,a=null;const i=e=>"$"+parseFloat(e||0).toLocaleString("es-MX",{minimumFractionDigits:2,maximumFractionDigits:2});async function l(t,n={}){n.headers={"Content-Type":"application/json",Authorization:"Bearer "+e};const o=await fetch(t,n);if(401===o.status)return void(window.location.href="/pos/login");const a=await o.json();if(!o.ok)throw new Error(a.error||`HTTP ${o.status}`);return a}const d={1:"Mostrador",2:"Taller",3:"Mayoreo"},r={1:"mostrador",2:"taller",3:"mayoreo"};function s(e){return e.credit_balance>0&&e.credit_limit>0&&e.credit_balance>e.credit_limit?'<span class="badge badge--warning"><span class="badge-dot"></span>Mora</span>':'<span class="badge badge--active"><span class="badge-dot"></span>Activo</span>'}function c(e){if(!e)return"--";const t=e.trim().split(/\s+/);return t.length>=2?(t[0][0]+t[1][0]).toUpperCase():e.substring(0,2).toUpperCase()}function m(e){if(!e)return"-";try{return new Date(e).toLocaleDateString("es-MX",{day:"2-digit",month:"short",year:"numeric"})}catch(t){return e}}async function p(e,o){e=e||t;const a=document.getElementById("searchInput");o=void 0!==o?o:a&&a.value||"";try{const a=new URLSearchParams({page:e,per_page:50});o&&a.append("q",o);const i=await l(`/pos/api/customers?${a}`);!function(e){const t=document.getElementById("customersBody");if(!t)return;if(!e||0===e.length)return void(t.innerHTML='<tr><td colspan="9" style="text-align:center;padding:var(--space-8);color:var(--color-text-muted);">Sin resultados.</td></tr>');g||(g=new VirtualScroll({container:t,rowHeight:52,buffer:3,renderRow:u,emptyHtml:'<tr><td colspan="9" style="text-align:center;padding:var(--space-8);color:var(--color-text-muted);">Sin resultados.</td></tr>'}));g.setData(e)}(i.data||[]),function(e){const o=document.querySelector(".pagination"),a=document.getElementById("tableInfo");if(!e||!e.total_pages)return o&&(o.innerHTML=""),void(a&&(a.textContent=""));n=e.total_pages,t=e.page;const i=e.total||0,l=e.per_page||50,d=(e.page-1)*l+1,r=Math.min(e.page*l,i);a&&(a.textContent=`Mostrando ${d}–${r} de ${i.toLocaleString("es-MX")} clientes`);if(!o)return;if(n<=1)return void(o.innerHTML="");let s="";s+=`<button class="page-btn" ${e.page<=1?"disabled":""} onclick="Customers.goToPage(${e.page-1})">&#8249;</button>`;const c=7;let m=Math.max(1,e.page-3),p=Math.min(n,m+c-1);p-m<c-1&&(m=Math.max(1,p-c+1));for(let t=m;t<=p;t++)s+=`<button class="page-btn ${t===e.page?"active":""}" onclick="Customers.goToPage(${t})">${t}</button>`;p<n&&(s+='<span style="color:var(--color-text-muted);font-size:var(--text-caption);padding:0 4px;">...</span>',s+=`<button class="page-btn" onclick="Customers.goToPage(${n})">${n}</button>`);s+=`<button class="page-btn" ${e.page>=n?"disabled":""} onclick="Customers.goToPage(${e.page+1})">&#8250;</button>`,o.innerHTML=s}(i.pagination||{})}catch(e){console.error("Load customers failed:",e)}}function u(e){const t=d[e.price_tier]||"Mostrador",n=r[e.price_tier]||"mostrador",a=parseFloat(e.credit_limit||0),l=parseFloat(e.credit_balance||0),c=Math.max(0,a-l),p=a>0?Math.round(l/a*100):0,u=p>=80?"none":p>=60?"low":"",g=String(e.id).padStart(5,"0");return'<tr class="'+(o&&o.id===e.id?"selected":"")+'" onclick="selectCustomer('+e.id+')"><td class="cell-num">'+g+'</td><td><div class="cell-name">'+(e.name||"")+'</div><div class="cell-name-sub hide-mobile">'+(e.email||"")+'</div></td><td class="cell-rfc hide-mobile">'+(e.rfc||"-")+'</td><td class="hide-mobile">'+(e.phone||"-")+'</td><td class="hide-mobile" style="font-size:var(--text-caption);color:var(--color-text-secondary);">'+(e.email||"-")+'</td><td><span class="tipo-chip tipo-chip--'+n+'">'+t+'</span></td><td class="cell-credit '+u+'">'+i(c)+'</td><td class="cell-date hide-mobile">'+m(e.last_purchase||e.created_at)+"</td><td>"+s(e)+"</td></tr>"}var g=null;function v(){clearTimeout(a),a=setTimeout((()=>{t=1,p(1)}),300)}async function f(e){try{const n=await l(`/pos/api/customers/${e}`);o=n;const a=document.getElementById("detailEmpty"),u=document.getElementById("detailContent");a&&(a.style.display="none"),u&&(u.style.display="flex");const g=document.getElementById("detailAvatar");g&&(g.textContent=c(n.name));const v=document.getElementById("detailName");v&&(v.textContent=(n.name||"").toUpperCase());const f=document.getElementById("detailRFC");f&&(f.textContent=n.rfc||"-");const y=document.getElementById("detailTipo");if(y){const e=d[n.price_tier]||"Mostrador",t=r[n.price_tier]||"mostrador";y.textContent=e,y.className=`tipo-chip tipo-chip--${t}`}const b=document.getElementById("detailStatus");b&&(b.innerHTML=s(n));const h=(e,t)=>{const n=document.getElementById(e);n&&(n.textContent=t||"-")};h("detailAddress",n.address),h("detailPhone",n.phone),h("detailEmail",n.email),h("detailSince",m(n.created_at)),h("detailLastPurchase",m(n.last_purchase));const x=parseFloat(n.credit_limit||0),C=parseFloat(n.credit_balance||0),E=Math.max(0,x-C),I=x>0?Math.round(C/x*100):0;h("detailCreditLimit",i(x)),h("detailCreditAvail",i(E)),h("detailCreditUsed",i(C)),h("detailCreditPct",I+"%");const B=document.getElementById("detailCreditBar");B&&(B.style.width=I+"%",B.className="progress-bar__fill "+(I<40?"low":I>75?"high":""));const w=document.getElementById("historyBody");if(w){const e=n.recent_purchases||[];0===e.length?w.innerHTML='<tr><td colspan="4" style="text-align:center;color:var(--color-text-muted);padding:var(--space-4);">Sin compras recientes</td></tr>':(w.innerHTML="",e.forEach((e=>{const t="paid"===e.status?"mbadge--paid":"overdue"===e.status?"mbadge--overdue":"mbadge--pending",n="paid"===e.status?"Pagado":"overdue"===e.status?"Vencido":"Pendiente",o=document.createElement("tr");o.innerHTML=`\n                            <td class="date">${m(e.created_at)}</td>\n                            <td class="folio">NX-${String(e.id).padStart(5,"0")}</td>\n                            <td class="total">${i(e.total)}</td>\n                            <td><span class="mbadge ${t}">${n}</span></td>\n                        `,w.appendChild(o)})))}!function(e){const t=(e,t)=>{const n=document.getElementById(e);n&&(n.textContent=t||"--")};t("panelAvatar",c(e.name)),t("panelName",e.name),t("panelRfc","RFC: "+(e.rfc||"-"));const n=parseFloat(e.credit_limit||0),o=parseFloat(e.credit_balance||0),a=Math.max(0,n-o),l=n>0?Math.round(o/n*100):0;t("panelCreditLimit",i(n)),t("panelCreditUsed",i(o)),t("panelCreditAvail",i(a));const d=document.getElementById("panelCreditBar");d&&(d.style.width=l+"%");const r=document.getElementById("panelVehicles");if(r){const t=e.vehicle_info||[];0===t.length?r.innerHTML='<span style="color:var(--color-text-muted);font-size:var(--text-body-sm);">Sin vehiculos registrados</span>':r.innerHTML=t.map((e=>`<div style="padding:4px 0;border-bottom:1px solid var(--color-border);">\n                        <strong>${e.make||""} ${e.model||""} ${e.year||""}</strong>\n                        ${e.plates?` <span style="color:var(--color-text-muted);">Placas: ${e.plates}</span>`:""}\n                    </div>`)).join("")}const s=document.getElementById("panelPurchases");if(s){const t=e.recent_purchases||[];0===t.length?s.innerHTML='<span style="color:var(--color-text-muted);font-size:var(--text-body-sm);">Sin compras recientes</span>':s.innerHTML=t.slice(0,5).map((e=>`<div style="display:flex;justify-content:space-between;padding:4px 0;border-bottom:1px solid var(--color-border);font-size:var(--text-body-sm);">\n                        <span>NX-${String(e.id).padStart(5,"0")} — ${m(e.created_at)}</span>\n                        <span>${i(e.total)}</span>\n                    </div>`)).join("")}}(n),p(t)}catch(e){console.error("Error loading customer:",e)}}function y(){const e=document.getElementById("customerModal");e&&(document.getElementById("modalTitle").textContent="Nuevo Cliente",document.getElementById("editId").value="",document.getElementById("fName").value="",document.getElementById("fRfc").value="",document.getElementById("fRazonSocial").value="",document.getElementById("fRegimenFiscal").value="",document.getElementById("fUsoCfdi").value="G03",document.getElementById("fCp").value="",document.getElementById("fPhone").value="",document.getElementById("fEmail").value="",document.getElementById("fAddress").value="",document.getElementById("fPriceTier").value="1",document.getElementById("fCreditLimit").value="0",e.classList.add("active"),document.getElementById("fName").focus())}function b(){if(!o)return;const e=o,t=document.getElementById("customerModal");t&&(document.getElementById("modalTitle").textContent="Editar Cliente",document.getElementById("editId").value=e.id,document.getElementById("fName").value=e.name||"",document.getElementById("fRfc").value=e.rfc||"",document.getElementById("fRazonSocial").value=e.razon_social||"",document.getElementById("fRegimenFiscal").value=e.regimen_fiscal||"",document.getElementById("fUsoCfdi").value=e.uso_cfdi||"G03",document.getElementById("fCp").value=e.cp||"",document.getElementById("fPhone").value=e.phone||"",document.getElementById("fEmail").value=e.email||"",document.getElementById("fAddress").value=e.address||"",document.getElementById("fPriceTier").value=e.price_tier||"1",document.getElementById("fCreditLimit").value=e.credit_limit||0,t.classList.add("active"))}function h(){const e=document.getElementById("customerModal");e&&e.classList.remove("active")}async function x(){if(!o)return;const e=document.getElementById("statementModal");if(!e)return;const t=document.getElementById("statementName");t&&(t.textContent=o.name);const n=document.getElementById("statementContent");n&&(n.innerHTML='<div style="text-align:center;padding:20px;color:var(--color-text-muted);">Cargando...</div>'),e.classList.add("active");try{const e=await l(`/pos/api/customers/${o.id}/statement`);let t=`<div style="margin-bottom:12px;font-size:14px;">\n                <strong>Saldo actual: ${i(e.balance)}</strong> |\n                Limite: ${i(e.customer?e.customer.credit_limit:0)}\n            </div>`;e.entries&&0!==e.entries.length?(t+='<table style="width:100%;border-collapse:collapse;font-size:13px;">',t+='<tr style="background:var(--color-surface-2);"><th style="padding:8px;text-align:left;">Fecha</th><th style="text-align:left;">Concepto</th><th style="text-align:right;padding:8px;">Cargo</th><th style="text-align:right;padding:8px;">Abono</th><th style="text-align:right;padding:8px;">Saldo</th></tr>',e.entries.forEach((e=>{t+=`<tr style="border-bottom:1px solid var(--color-border);">\n                        <td style="padding:6px 8px;">${m(e.date)}</td>\n                        <td>${e.description||""}</td>\n                        <td style="text-align:right;padding:6px 8px;">${"charge"===e.type?i(e.amount):""}</td>\n                        <td style="text-align:right;padding:6px 8px;">${"payment"===e.type?i(e.amount):""}</td>\n                        <td style="text-align:right;padding:6px 8px;">${i(e.running_balance)}</td>\n                    </tr>`})),t+="</table>"):t+='<div style="color:var(--color-text-muted);padding:20px;text-align:center;">Sin movimientos</div>',n&&(n.innerHTML=t)}catch(e){n&&(n.innerHTML=`<div style="color:var(--color-error);padding:20px;text-align:center;">Error: ${e.message}</div>`)}}function C(){const e=document.getElementById("paymentModal");e&&e.classList.remove("active")}function E(e){f(e),"function"==typeof openSlidePanel&&openSlidePanel()}return window.filterCustomers=function(){v()},e?(window.openNewCustomerModal=y,function(){const e=document.querySelectorAll(".quick-actions .action-btn");e.length>=1&&(e[0].onclick=()=>{o&&(window.location.href="/pos/?customer="+o.id)}),e.length>=2&&(e[1].onclick=()=>b()),e.length>=3&&(e[2].onclick=()=>x()),e.length>=4&&(e[3].onclick=()=>{o&&f(o.id)})}(),window.viewCustomer=E,function(){if(!document.getElementById("customerModal")){const e=document.createElement("div");e.innerHTML='\n            <div id="customerModal" class="modal-overlay" style="display:none;">\n                <div class="modal-box">\n                    <div class="modal-header">\n                        <h3 id="modalTitle">Nuevo Cliente</h3>\n                        <button class="btn-close" onclick="Customers.closeModal()">&times;</button>\n                    </div>\n                    <div class="modal-body">\n                        <input type="hidden" id="editId" />\n                        <div class="form-row">\n                            <div class="form-group"><label>Nombre *</label><input type="text" id="fName" class="form-input" placeholder="Nombre del cliente" /></div>\n                            <div class="form-group"><label>RFC</label><input type="text" id="fRfc" class="form-input" placeholder="RFC" maxlength="13" /></div>\n                        </div>\n                        <div class="form-row">\n                            <div class="form-group"><label>Razon Social</label><input type="text" id="fRazonSocial" class="form-input" placeholder="Razon Social" /></div>\n                            <div class="form-group"><label>Regimen Fiscal</label>\n                                <select id="fRegimenFiscal" class="form-input">\n                                    <option value="">-- Seleccionar --</option>\n                                    <option value="601">601 - General de Ley PM</option>\n                                    <option value="603">603 - Personas Morales Fines No Lucrativos</option>\n                                    <option value="605">605 - Sueldos y Salarios</option>\n                                    <option value="606">606 - Arrendamiento</option>\n                                    <option value="608">608 - Demas Ingresos</option>\n                                    <option value="612">612 - Personas Fisicas Empresariales</option>\n                                    <option value="616">616 - Sin Obligaciones Fiscales</option>\n                                    <option value="621">621 - Incorporacion Fiscal</option>\n                                    <option value="625">625 - RESICO</option>\n                                    <option value="626">626 - RESICO PM</option>\n                                </select>\n                            </div>\n                        </div>\n                        <div class="form-row">\n                            <div class="form-group"><label>Uso CFDI</label>\n                                <select id="fUsoCfdi" class="form-input">\n                                    <option value="G01">G01 - Adquisicion de mercancias</option>\n                                    <option value="G03" selected>G03 - Gastos en general</option>\n                                    <option value="I01">I01 - Construcciones</option>\n                                    <option value="I08">I08 - Otra maquinaria</option>\n                                    <option value="P01">P01 - Por definir</option>\n                                    <option value="S01">S01 - Sin efectos fiscales</option>\n                                </select>\n                            </div>\n                            <div class="form-group"><label>Codigo Postal</label><input type="text" id="fCp" class="form-input" placeholder="C.P." maxlength="5" /></div>\n                        </div>\n                        <div class="form-row">\n                            <div class="form-group"><label>Telefono</label><input type="text" id="fPhone" class="form-input" placeholder="Telefono" /></div>\n                            <div class="form-group"><label>Email</label><input type="email" id="fEmail" class="form-input" placeholder="correo@ejemplo.com" /></div>\n                        </div>\n                        <div class="form-group"><label>Direccion</label><input type="text" id="fAddress" class="form-input" placeholder="Direccion" /></div>\n                        <div class="form-row">\n                            <div class="form-group"><label>Tipo Precio</label>\n                                <select id="fPriceTier" class="form-input">\n                                    <option value="1">Mostrador</option>\n                                    <option value="2">Taller</option>\n                                    <option value="3">Mayoreo</option>\n                                </select>\n                            </div>\n                            <div class="form-group"><label>Limite de Credito</label><input type="number" id="fCreditLimit" class="form-input" value="0" min="0" step="1000" /></div>\n                        </div>\n                    </div>\n                    <div class="modal-footer">\n                        <button class="btn btn-secondary" onclick="Customers.closeModal()">Cancelar</button>\n                        <button class="btn btn-primary" onclick="Customers.save()">Guardar</button>\n                    </div>\n                </div>\n            </div>',document.body.appendChild(e)}if(!document.getElementById("statementModal")){const e=document.createElement("div");e.innerHTML='\n            <div id="statementModal" class="modal-overlay" style="display:none;">\n                <div class="modal-box modal-box--wide">\n                    <div class="modal-header">\n                        <h3>Estado de Cuenta — <span id="statementName"></span></h3>\n                        <button class="btn-close" onclick="Customers.closeStatement()">&times;</button>\n                    </div>\n                    <div class="modal-body" id="statementContent" style="max-height:60vh;overflow-y:auto;">\n                    </div>\n                    <div class="modal-footer">\n                        <button class="btn btn-primary" onclick="Customers.showPaymentModal()">Registrar Abono</button>\n                        <button class="btn btn-secondary" onclick="Customers.closeStatement()">Cerrar</button>\n                    </div>\n                </div>\n            </div>',document.body.appendChild(e)}if(!document.getElementById("paymentModal")){const e=document.createElement("div");e.innerHTML='\n            <div id="paymentModal" class="modal-overlay" style="display:none;">\n                <div class="modal-box">\n                    <div class="modal-header">\n                        <h3>Registrar Abono</h3>\n                        <button class="btn-close" onclick="Customers.closePayment()">&times;</button>\n                    </div>\n                    <div class="modal-body">\n                        <p style="margin-bottom:var(--space-4);color:var(--color-text-secondary);">Cliente: <strong id="paymentCustomerName"></strong></p>\n                        <div class="form-row">\n                            <div class="form-group"><label>Monto</label><input type="number" id="paymentAmount" class="form-input" placeholder="0.00" min="0" step="0.01" /></div>\n                            <div class="form-group"><label>Metodo</label>\n                                <select id="paymentMethod" class="form-input">\n                                    <option value="cash">Efectivo</option>\n                                    <option value="transfer">Transferencia</option>\n                                    <option value="card">Tarjeta</option>\n                                    <option value="check">Cheque</option>\n                                </select>\n                            </div>\n                        </div>\n                        <div class="form-group"><label>Referencia</label><input type="text" id="paymentRef" class="form-input" placeholder="Num. referencia (opcional)" /></div>\n                    </div>\n                    <div class="modal-footer">\n                        <button class="btn btn-secondary" onclick="Customers.closePayment()">Cancelar</button>\n                        <button class="btn btn-primary" onclick="Customers.recordPayment()">Registrar</button>\n                    </div>\n                </div>\n            </div>',document.body.appendChild(e)}if(!document.getElementById("modalStyles")){const e=document.createElement("style");e.id="modalStyles",e.textContent="\n                .modal-overlay {\n                    position: fixed; top: 0; left: 0; right: 0; bottom: 0;\n                    background: rgba(0,0,0,0.5); z-index: 9000;\n                    display: flex; align-items: center; justify-content: center;\n                    backdrop-filter: blur(2px);\n                }\n                .modal-overlay.active { display: flex !important; }\n                .modal-box {\n                    background: var(--color-bg-elevated); border: 1px solid var(--color-border);\n                    border-radius: var(--radius-lg); width: 90%; max-width: 600px;\n                    max-height: 85vh; overflow-y: auto;\n                    box-shadow: var(--shadow-xl);\n                }\n                .modal-box--wide { max-width: 800px; }\n                .modal-header {\n                    display: flex; align-items: center; justify-content: space-between;\n                    padding: var(--space-4) var(--space-5);\n                    border-bottom: 1px solid var(--color-border);\n                }\n                .modal-header h3 {\n                    font-family: var(--font-heading); font-size: var(--text-h6);\n                    font-weight: var(--heading-weight-primary); color: var(--color-text-primary);\n                    letter-spacing: var(--tracking-wide); text-transform: uppercase;\n                }\n                .modal-body { padding: var(--space-5); }\n                .modal-footer {\n                    display: flex; justify-content: flex-end; gap: var(--space-3);\n                    padding: var(--space-4) var(--space-5);\n                    border-top: 1px solid var(--color-border);\n                }\n                .form-row { display: flex; gap: var(--space-4); margin-bottom: var(--space-4); }\n                .form-row > .form-group { flex: 1; }\n                .form-group { margin-bottom: var(--space-4); }\n                .form-group label {\n                    display: block; font-size: var(--text-caption); font-weight: var(--font-weight-semibold);\n                    color: var(--color-text-muted); text-transform: uppercase; letter-spacing: var(--tracking-wider);\n                    margin-bottom: var(--space-1);\n                }\n                .form-input {\n                    width: 100%; height: 38px; padding: 0 var(--space-3);\n                    background: var(--color-bg-overlay); border: 1.5px solid var(--color-border);\n                    border-radius: var(--radius-md); font-family: var(--font-body);\n                    font-size: var(--text-body-sm); color: var(--color-text-primary); outline: none;\n                    transition: var(--transition-fast);\n                }\n                .form-input:focus { border-color: var(--color-border-focus); box-shadow: var(--shadow-focus); }\n                select.form-input { cursor: pointer; }\n            ",document.head.appendChild(e)}}(),p(),async function(){try{const e=await l("/pos/api/customers?page=1&per_page=1"),t=e.pagination?e.pagination.total:0,n=document.querySelectorAll(".summary-card__value");n.length>=1&&(n[0].textContent=t.toLocaleString("es-MX"))}catch(e){}}()):window.location.href="/pos/login",{search:v,goToPage:function(e){e<1||e>n||(t=e,p(e))},loadCustomers:p,showDetail:E,selectCustomer:f,closeDetail:function(){o=null;const e=document.getElementById("detailEmpty"),n=document.getElementById("detailContent");e&&(e.style.display="flex"),n&&(n.style.display="none"),p(t)},showCreateModal:y,editCurrent:b,closeModal:h,save:async function(){const e=document.getElementById("fName"),t=e?e.value.trim():"";if(!t)return void alert("Nombre es requerido");const n=e=>{const t=document.getElementById(e);return t?t.value.trim():""},a={name:t,rfc:n("fRfc")||null,razon_social:n("fRazonSocial")||null,regimen_fiscal:n("fRegimenFiscal")||null,uso_cfdi:n("fUsoCfdi")||"G03",cp:n("fCp")||null,phone:n("fPhone")||null,email:n("fEmail")||null,address:n("fAddress")||null,price_tier:parseInt(n("fPriceTier"))||1,credit_limit:parseFloat(n("fCreditLimit"))||0},i=n("editId");try{i?await l(`/pos/api/customers/${i}`,{method:"PUT",body:JSON.stringify(a)}):await l("/pos/api/customers",{method:"POST",body:JSON.stringify(a)}),h(),p(),i&&o&&f(i)}catch(e){alert("Error: "+e.message)}},showStatement:x,closeStatement:function(){const e=document.getElementById("statementModal");e&&e.classList.remove("active")},showPaymentModal:function(){if(!o)return;const e=document.getElementById("paymentModal");e&&(document.getElementById("paymentCustomerName").textContent=o.name,document.getElementById("paymentAmount").value="",document.getElementById("paymentMethod").value="cash",document.getElementById("paymentRef").value="",e.classList.add("active"),document.getElementById("paymentAmount").focus())},closePayment:C,recordPayment:async function(){if(!o)return;const e=parseFloat(document.getElementById("paymentAmount").value);if(!e||e<=0)return void alert("Ingresa un monto valido");const t=document.getElementById("paymentMethod").value,n=document.getElementById("paymentRef").value.trim();try{await l(`/pos/api/customers/${o.id}/payment`,{method:"POST",body:JSON.stringify({amount:e,method:t,reference:n})}),C(),f(o.id)}catch(e){alert("Error: "+e.message)}}}})();
\ No newline at end of file
diff --git a/pos/static/js/dashboard.min.js b/pos/static/js/dashboard.min.js
deleted file mode 100644
index 971c765..0000000
--- a/pos/static/js/dashboard.min.js
+++ /dev/null
@@ -1 +0,0 @@
-const Dashboard=(()=>{function t(){return localStorage.getItem("pos_token")||""}function e(t){return"$"+parseFloat(t||0).toLocaleString("es-MX",{minimumFractionDigits:2,maximumFractionDigits:2})}function n(t){return parseInt(t||0).toLocaleString("es-MX")}function a(){return(new Date).toISOString().slice(0,10)}function s(t){const e=new Date;return e.setDate(e.getDate()-t),e.toISOString().slice(0,10)}const o=["Dom","Lun","Mar","Mie","Jue","Vie","Sab"],r=["enero","febrero","marzo","abril","mayo","junio","julio","agosto","septiembre","octubre","noviembre","diciembre"],i=["Domingo","Lunes","Martes","Miercoles","Jueves","Viernes","Sabado"];function l(t){document.documentElement.setAttribute("data-theme",t);try{localStorage.setItem("nexus-theme",t)}catch(t){}const e=document.getElementById("btn-industrial"),n=document.getElementById("btn-modern");e&&e.classList.toggle("active","industrial"===t),n&&n.classList.toggle("active","modern"===t)}function c(){const t=document.getElementById("sidebar"),e=document.getElementById("sidebar-overlay");t&&t.classList.remove("open"),e&&e.classList.remove("open"),document.body.style.overflow=""}async function d(e){try{const n=await fetch(e,{headers:{Authorization:`Bearer ${t()}`,"Content-Type":"application/json"}});return 401===n.status?(window.location.href="/pos/login",null):n.ok?await n.json():null}catch(t){return console.error("Dashboard fetch error:",e,t),null}}async function m(){const t=a(),s=await d(`/pos/api/register/daily-summary?date=${t}`);if(!s)return u("kpi-ventas-total","kpi-ventas-meta"),u("kpi-tickets-count","kpi-tickets-meta"),u("kpi-promedio-value","kpi-promedio-meta"),null;const o=document.getElementById("kpi-ventas-total"),r=document.getElementById("kpi-ventas-meta");if(o&&(o.textContent=e(s.total_sales)),r){const t=Object.entries(s.sales_by_method||{}).map((([t,n])=>`${p(t)}: ${e(n.amount)}`)).join(" | ");r.innerHTML=t?`<span class="kpi-meta-text">${t}</span>`:'<span class="kpi-meta-text">Sin ventas aun</span>'}const i=document.getElementById("kpi-tickets-count"),l=document.getElementById("kpi-tickets-meta");if(i&&(i.textContent=n(s.total_sales_count)),l){const t=s.cancelled_count||0;l.innerHTML=t>0?`<span class="kpi-tag kpi-tag--neutral">${t} cancelada${t>1?"s":""}</span><span class="kpi-meta-text">de ${s.total_sales_count+t} totales</span>`:`<span class="kpi-meta-text">${s.total_sales_count} completada${1!==s.total_sales_count?"s":""}</span>`}const c=document.getElementById("kpi-promedio-value"),m=document.getElementById("kpi-promedio-meta"),v=s.total_sales_count>0?s.total_sales/s.total_sales_count:0;c&&(c.textContent=e(v)),m&&(m.innerHTML=`<span class="kpi-meta-text">sobre ${n(s.total_sales_count)} ventas</span>`);const g=document.getElementById("kpi-cajas-count"),y=document.getElementById("kpi-cajas-meta"),f=s.registers||[],h=f.filter((t=>"open"===t.status)),k=f.filter((t=>"closed"===t.status));return g&&(g.textContent=f.length),y&&(y.innerHTML=`<span class="kpi-tag kpi-tag--up">${h.length} abierta${1!==h.length?"s":""}</span><span class="kpi-meta-text">${k.length} cerrada${1!==k.length?"s":""}</span>`),function(t){const n=document.getElementById("registers-list");if(!n)return;if(!t||0===t.length)return void(n.innerHTML='<div class="rank-item" style="justify-content:center;color:var(--color-text-muted);font-size:var(--text-caption);">Sin cajas registradas hoy</div>');const a=Math.max(...t.map((t=>t.sale_total||0)),1);n.innerHTML=t.map(((t,n)=>{const s="open"===t.status?"kpi-tag--up":"kpi-tag--neutral",o="open"===t.status?"Abierta":"Cerrada",r=a>0?Math.round(t.sale_total/a*100):0;return`\n                <div class="rank-item">\n                    <div class="rank-num ${0===n?"rank-num--1":1===n?"rank-num--2":""}">${n+1}</div>\n                    <div class="rank-item__info">\n                        <div class="rank-item__name">Caja ${t.register_number||t.id}</div>\n                        <div class="rank-item__sub">${t.employee_name||"Sin cajero"} &nbsp;&middot;&nbsp; ${t.sale_count||0} ventas &nbsp;<span class="kpi-tag ${s}" style="font-size:9px;padding:1px 6px;">${o}</span></div>\n                        <div class="rank-item__bar-bg">\n                            <div class="rank-item__bar-fill" style="width:${r}%"></div>\n                        </div>\n                    </div>\n                    <div class="rank-item__value">${e(t.sale_total)}</div>\n                </div>`})).join("")}(f),s}function u(t,e){const n=document.getElementById(t),a=document.getElementById(e);n&&(n.textContent="--"),a&&(a.innerHTML='<span class="kpi-meta-text" style="color:var(--color-error)">Error al cargar</span>')}function p(t){return t?t.charAt(0).toUpperCase()+t.slice(1):""}function v(t,e,n,a,s){return`\n            <div class="alert-item alert-item--${t}">\n                <div class="alert-icon-wrap alert-icon-wrap--${t}">${s}</div>\n                <div class="alert-content">\n                    <div style="display:flex;align-items:center;gap:var(--space-2);margin-bottom:3px;">\n                        <span class="alert-title">${e}</span>\n                        <span class="alert-badge alert-badge--${t}">${n}</span>\n                    </div>\n                    <div class="alert-desc">${a}</div>\n                </div>\n                <a href="/pos/inventory#alertas" class="alert-action" style="text-decoration:none;">Ver</a>\n            </div>`}function g(t){const e=document.createElement("div");return e.textContent=t||"",e.innerHTML}async function y(){const t=a(),n=await d(`/pos/api/sales?date_from=${t}&date_to=${t}&per_page=10`),s=document.getElementById("recent-sales-tbody");if(!s)return;if(!n||!n.data||0===n.data.length)return void(s.innerHTML='<tr><td colspan="5" style="text-align:center;color:var(--color-text-muted);font-size:var(--text-caption);">Sin ventas hoy</td></tr>');const o=n.data.slice(0,5),r=await Promise.all(o.map((t=>d(`/pos/api/sales/${t.id}`))));s.innerHTML=o.map(((t,n)=>{const a=r[n],s=t.created_at?t.created_at.slice(11,16):"--:--",o=t.customer_name||"Publico General",i=t.total||0,l=t.payment_method||"efectivo";let c="";a&&a.items&&a.items.length>0&&(c=a.items.slice(0,3).map((t=>`${g(t.name)}${t.quantity>1?" (x"+t.quantity+")":""}`)).join(", "),a.items.length>3&&(c+="..."));const d=function(t){const e=(t||"").toLowerCase();return e.includes("efectivo")||"cash"===e?"efectivo":e.includes("tarjeta")||"card"===e?"tarjeta":e.includes("transferencia")||"transfer"===e?"transferencia":e.includes("credito")||"credit"===e?"credito":"efectivo"}(l),m=p(l),u="cancelled"===t.status?' <span style="color:var(--color-error);font-size:10px;font-weight:700;">[CANCELADA]</span>':"";return`\n                <tr>\n                    <td><span class="td-time">${s}</span></td>\n                    <td><span class="td-client">${g(o)}</span>${u}</td>\n                    <td class="td-products">${c}</td>\n                    <td><span class="td-mono">${e(i)}</span></td>\n                    <td><span class="pago-badge pago-badge--${d}">${m}</span></td>\n                </tr>`})).join("")}function f(){if(t()||(window.location.href="/pos/login",0)){try{const t=localStorage.getItem("nexus-theme");"industrial"!==t&&"modern"!==t||l(t)}catch(t){}!function(){const e=new Date,n=e.getHours();let a="Buenos dias";n>=12&&n<19?a="Buenas tardes":n>=19&&(a="Buenas noches");let s="";try{const e=JSON.parse(atob(t().split(".")[1]));s=e.name||e.sub||""}catch(t){}const o=document.getElementById("header-greeting");o&&(o.textContent=s?`${a}, ${s}`:a);const l=document.getElementById("header-subtitle");if(l){const t=i[e.getDay()],n=e.getDate(),a=r[e.getMonth()],s=e.getFullYear();l.textContent=`${t}, ${n} de ${a} de ${s}`}}(),m(),async function(){const t=await d("/pos/api/inventory/alerts"),e=document.getElementById("alerts-grid");if(!e)return;if(!t||!t.data||0===t.data.length)return void(e.innerHTML='\n                <div class="alert-item" style="border-left:4px solid var(--color-success);justify-content:center;">\n                    <div class="alert-icon-wrap" style="background-color:rgba(34,197,94,0.1);color:var(--color-success);">\n                        <svg width="18" height="18" viewBox="0 0 18 18" fill="none"><circle cx="9" cy="9" r="7" stroke="currentColor" stroke-width="1.5"/><path d="M6 9l2 2 4-4" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/></svg>\n                    </div>\n                    <div class="alert-content">\n                        <span class="alert-title">Sin alertas</span>\n                        <div class="alert-desc">Todo el inventario dentro de parametros normales.</div>\n                    </div>\n                </div>');const n=t.data,a=n.filter((t=>"zero"===t.type)),s=n.filter((t=>"low"===t.type)),o=n.filter((t=>"over"===t.type));let r="";if(a.length>0){const t=a.slice(0,5).map((t=>`${t.name}: <strong>${t.stock} uds</strong>`)).join(" &middot; 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\ No newline at end of file
diff --git a/pos/static/js/diagrams.min.js b/pos/static/js/diagrams.min.js
deleted file mode 100644
index 7b1ee1f..0000000
--- a/pos/static/js/diagrams.min.js
+++ /dev/null
@@ -1 +0,0 @@
-!function(){"use strict";var e="/pos/api/diagrams",t=localStorage.getItem("pos_token");if(t){var a={Authorization:"Bearer "+t,"Content-Type":"application/json"},n={view:"list",diagrams:[],categories:[],currentDiagram:null,hotspots:[],selectedHotspot:null,scale:1,panX:0,panY:0,isPanning:!1,lastPointer:null},i=document.getElementById("diagramList"),o=document.getElementById("diagramViewer"),r=document.getElementById("svgContainer"),s=document.getElementById("svgWrapper"),c=document.getElementById("backBtn"),l=document.getElementById("zoomInBtn"),d=document.getElementById("zoomOutBtn"),u=document.getElementById("zoomResetBtn"),m=document.getElementById("diagramTitle"),p=document.getElementById("hotspotPanel"),g=document.getElementById("hotspotBody"),v=document.getElementById("hotspotClose"),f=document.getElementById("partsList"),y=document.getElementById("loading"),h=document.getElementById("emptyState"),_=document.getElementById("diagramFilter"),b=document.getElementById("profileAvatar"),E=document.getElementById("profileName"),L=document.getElementById("profileRole");window.DiagramsApp={openDiagram:function(t){k(e+"/"+t,(function(t,r){t||!r||r.error||(n.currentDiagram=r,n.hotspots=r.hotspots||[],function(){n.view="viewer",i.style.display="none",o.style.display="flex",A();var t=n.currentDiagram;m&&(m.textContent=t.name_es||t.name);M(),r=t.id_diagram,s.innerHTML='<div class="svg-loading">Cargando diagrama...</div>',fetch(e+"/"+r+"/svg",{headers:a}).then((function(e){return e.text()})).then((function(e){s.innerHTML=e;var t=s.querySelector("svg");t&&(t.style.width="100%",t.style.height="100%",t.setAttribute("preserveAspectRatio","xMidYMid meet"),function(e){var t=e.querySelectorAll("[data-hotspot]");t.forEach((function(e){var t=parseInt(e.getAttribute("data-hotspot"));e.style.cursor="pointer",e.addEventListener("click",(function(e){e.stopPropagation(),C(t)})),e.addEventListener("mouseenter",(function(){x(t,!0)})),e.addEventListener("mouseleave",(function(){x(t,!1)}))}))}(t))})).catch((function(){s.innerHTML='<div class="svg-error">Error al cargar el diagrama</div>'})),function(){if(!f)return;var e='<h4 class="parts-list__title">Partes en diagrama</h4>';n.hotspots.forEach((function(t){var a=P(t.callout_number),n=t.part_name_es||t.part_name||a.name,i=t.part_number||"";e+='<div class="part-item" data-callout="'+t.callout_number+'" onclick="DiagramsApp.selectHotspot('+t.callout_number+')">',e+='<span class="part-item__callout">'+t.callout_number+"</span>",e+='<div class="part-item__info">',e+='<div class="part-item__name">'+Y(n)+"</div>",i&&(e+='<div class="part-item__number">'+Y(i)+"</div>"),e+="</div>",e+="</div>"})),0===n.hotspots.length&&(e+='<div class="parts-list__empty">Sin partes definidas</div>');f.innerHTML=e}();var r}())}))},selectHotspot:C,viewPart:function(e){window.open("/pos/catalog?part="+e,"_blank")},searchPart:function(e){window.open("/pos/catalog?search="+encodeURIComponent(e),"_blank")},addToCart:function(e){alert("Funcion disponible desde el catalogo. Busca la parte para agregarla al carrito.")}},"loading"===document.readyState?document.addEventListener("DOMContentLoaded",B):B()}else window.location.href="/pos/login";function B(){!function(){try{var e=JSON.parse(localStorage.getItem("pos_user")||"{}");if(E&&(E.textContent=e.name||"--"),L&&(L.textContent=e.role||"--"),b){var t=e.name||"--";b.textContent=t.split(" ").map((function(e){return e[0]||""})).join("").substring(0,2).toUpperCase()}}catch(e){}}(),k(e+"/",(function(e,t){if(!e&&t&&t.data){n.diagrams=t.data;var a={};t.data.forEach((function(e){var t=e.category_name||"Other";a[t]||(a[t]={name:t,name_es:e.category_name_es||t,diagrams:[]}),a[t].diagrams.push(e)})),n.categories=Object.values(a),w()}else h.style.display="flex"})),function(){c&&c.addEventListener("click",I);l&&l.addEventListener("click",(function(){D(1.25)}));d&&d.addEventListener("click",(function(){D(.8)}));u&&u.addEventListener("click",M);v&&v.addEventListener("click",A);_&&_.addEventListener("input",w);r&&(r.addEventListener("wheel",(function(e){e.preventDefault(),D(e.deltaY<0?1.1:.9)}),{passive:!1}),r.addEventListener("mousedown",H),r.addEventListener("mousemove",q),r.addEventListener("mouseup",O),r.addEventListener("mouseleave",O),r.addEventListener("touchstart",(function(e){1===e.touches.length&&H({clientX:e.touches[0].clientX,clientY:e.touches[0].clientY,preventDefault:function(){}})})),r.addEventListener("touchmove",(function(e){1===e.touches.length&&(e.preventDefault(),q({clientX:e.touches[0].clientX,clientY:e.touches[0].clientY}))}),{passive:!1}),r.addEventListener("touchend",O));document.addEventListener("keydown",(function(e){"viewer"===n.view&&("Escape"===e.key&&(n.selectedHotspot?A():I()),"+"!==e.key&&"="!==e.key||D(1.15),"-"===e.key&&D(.87),"0"===e.key&&M())}))}()}function k(e,t){y.style.display="flex",h.style.display="none",fetch(e,{headers:a}).then((function(e){return e.json()})).then((function(e){y.style.display="none",t(null,e)})).catch((function(e){y.style.display="none",t(e)}))}function w(){n.view="list",o.style.display="none",i.style.display="block";var e=(_&&_.value||"").toLowerCase(),t="";n.categories.forEach((function(a){var n=a.diagrams.filter((function(t){return!e||(-1!==(t.name_es||t.name||"").toLowerCase().indexOf(e)||-1!==(t.category_name_es||"").toLowerCase().indexOf(e)||-1!==(t.group_name_es||"").toLowerCase().indexOf(e))}));0!==n.length&&(t+='<div class="diagram-category">',t+='<h3 class="category-title">'+Y(a.name_es||a.name)+"</h3>",t+='<div class="diagram-grid">',n.forEach((function(e){t+='<div class="diagram-card" data-id="'+e.id_diagram+'" onclick="DiagramsApp.openDiagram('+e.id_diagram+')">',t+='<div class="diagram-card__preview">',t+='<img src="/pos/static/'+Y(e.image_path)+'" alt="'+Y(e.name_es||e.name)+'" loading="lazy" />',t+="</div>",t+='<div class="diagram-card__info">',t+='<div class="diagram-card__name">'+Y(e.name_es||e.name)+"</div>",t+='<div class="diagram-card__group">'+Y(e.group_name_es||e.group_name||"")+"</div>",t+="</div>",t+="</div>"})),t+="</div></div>")})),h.style.display=t?"none":"flex",i.innerHTML=t}function I(){n.view="list",n.currentDiagram=null,n.selectedHotspot=null,o.style.display="none",i.style.display="block",A()}function x(e,t){f.querySelectorAll(".part-item").forEach((function(a){parseInt(a.dataset.callout)===e&&a.classList.toggle("is-highlighted",t)}))}function C(e){var t=n.hotspots.find((function(t){return t.callout_number===e}));if(t){n.selectedHotspot=t;var a=s.querySelector("svg");a&&a.querySelectorAll("[data-hotspot]").forEach((function(t){parseInt(t.getAttribute("data-hotspot"))===e?(t.style.fill="rgba(245, 166, 35, 0.25)",t.style.stroke="#F5A623",t.style.strokeWidth="3"):(t.style.fill="transparent",t.style.stroke="none")})),f.querySelectorAll(".part-item").forEach((function(t){t.classList.toggle("is-active",parseInt(t.dataset.callout)===e)})),function(e){p.classList.add("is-open");e.part_name_es||e.part_name||e.callout_number;var t=e.part_number||"",a=e.description_es||e.description||"",n=P(e.callout_number),i=e.part_name_es||e.part_name||n.name,o=a||n.desc,r="";r+='<div class="hotspot-detail">',r+='<div class="hotspot-callout">'+e.callout_number+"</div>",r+='<h4 class="hotspot-name">'+Y(i)+"</h4>",t&&(r+='<div class="hotspot-partnumber">No. Parte: '+Y(t)+"</div>");o&&(r+='<p class="hotspot-desc">'+Y(o)+"</p>");r+='<div class="hotspot-actions">',e.part_id?(r+='<button class="btn btn-primary btn-sm" onclick="DiagramsApp.viewPart('+e.part_id+')">Ver detalle</button>',r+='<button class="btn btn-accent btn-sm" onclick="DiagramsApp.addToCart('+e.part_id+')"><svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="9" cy="21" r="1"/><circle cx="20" cy="21" r="1"/><path d="M1 1h4l2.68 13.39a2 2 0 002 1.61h9.72a2 2 0 002-1.61L23 6H6"/></svg> Agregar</button>'):r+='<button class="btn btn-primary btn-sm" onclick="DiagramsApp.searchPart(\''+Y(i)+"')\">Buscar en catalogo</button>";r+="</div>",r+="</div>",g.innerHTML=r}(t)}}function P(e){var t=n.currentDiagram;if(!t)return{name:"Parte "+e,desc:""};var a=(t.name||"").toLowerCase();return-1!==a.indexOf("brak")||-1!==a.indexOf("freno")?{1:{name:"Disco de freno",desc:"Disco ventilado de freno delantero. Se recomienda cambiar en pares."},2:{name:"Caliper de freno",desc:"Caliper con pistones, incluye purga. Verificar compatibilidad con tipo de pastilla."},3:{name:"Pastillas de freno",desc:"Juego de pastillas con indicador de desgaste. Material ceramico o semi-metalico."},4:{name:"Manguera de freno",desc:"Manguera flexible de alta presion. Revisar por grietas cada 40,000 km."},5:{name:"Cilindro maestro",desc:"Cilindro maestro con deposito de liquido de frenos. Incluye empaques."}}[e]||{name:"Parte "+e,desc:""}:-1!==a.indexOf("susp")?{1:{name:"Amortiguador",desc:"Amortiguador delantero de gas. Se recomienda cambiar en pares."},2:{name:"Resorte helicoidal",desc:"Resorte de suspension delantera. Verificar altura libre."},3:{name:"Brazo de control",desc:"Brazo inferior de control con bujes. Incluye herraje de montaje."},4:{name:"Rotula",desc:"Rotula inferior de suspension. Incluye guardapolvo y seguros."},5:{name:"Barra de acoplamiento",desc:"Barra de acoplamiento de direccion con terminales. Requiere alineacion."}}[e]||{name:"Parte "+e,desc:""}:(-1!==a.indexOf("engine")||-1!==a.indexOf("motor"))&&{1:{name:"Filtro de aire",desc:"Filtro de aire del motor. Cambiar cada 15,000-20,000 km."},2:{name:"Bujias",desc:"Juego de bujias. Verificar tipo (platino, iridio) segun especificacion del motor."},3:{name:"Banda serpentina",desc:"Banda de accesorios. Revisar tension y desgaste. Incluye alternador, A/C y direccion."},4:{name:"Junta de culata",desc:"Junta de cabeza de cilindros. Material MLS multicapa. Requiere torque especifico."},5:{name:"Filtro de aceite",desc:"Filtro de aceite del motor. Cambiar en cada servicio de aceite."}}[e]||{name:"Parte "+e,desc:""}}function A(){p.classList.remove("is-open"),n.selectedHotspot=null;var e=s.querySelector("svg");e&&e.querySelectorAll("[data-hotspot]").forEach((function(e){e.style.fill="transparent",e.style.stroke="none"})),f&&f.querySelectorAll(".part-item").forEach((function(e){e.classList.remove("is-active")}))}function D(e){n.scale=Math.max(.3,Math.min(5,n.scale*e)),S()}function M(){n.scale=1,n.panX=0,n.panY=0,S()}function S(){s&&(s.style.transform="translate("+n.panX+"px, "+n.panY+"px) scale("+n.scale+")")}function H(e){e.button&&0!==e.button||(n.isPanning=!0,n.lastPointer={x:e.clientX,y:e.clientY})}function q(e){if(n.isPanning&&n.lastPointer){var t=e.clientX-n.lastPointer.x,a=e.clientY-n.lastPointer.y;n.panX+=t,n.panY+=a,n.lastPointer={x:e.clientX,y:e.clientY},S()}}function O(){n.isPanning=!1,n.lastPointer=null}function Y(e){if(!e)return"";var t=document.createElement("div");return t.appendChild(document.createTextNode(e)),t.innerHTML}}();
\ No newline at end of file
diff --git a/pos/static/js/fleet.min.js b/pos/static/js/fleet.min.js
deleted file mode 100644
index fce058d..0000000
--- a/pos/static/js/fleet.min.js
+++ /dev/null
@@ -1 +0,0 @@
-var Fleet=function(){"use strict";var e="/pos/api/fleet",t=localStorage.getItem("pos_token"),n=[],a=1,o=null;function l(){return{"Content-Type":"application/json",Authorization:"Bearer "+t}}function c(e){return null==e?"0":parseFloat(e).toLocaleString("es-MX")}function i(e){return null==e?"$0.00":"$"+parseFloat(e).toLocaleString("es-MX",{minimumFractionDigits:2,maximumFractionDigits:2})}function r(e){return e?new Date(e).toLocaleDateString("es-MX",{day:"2-digit",month:"short",year:"numeric"}):"—"}function d(e){if(!e)return"";var t=document.createElement("div");return t.textContent=e,t.innerHTML}function u(){fetch(e+"/stats",{headers:l()}).then((function(e){return e.json()})).then((function(e){document.getElementById("statTotal").textContent=c(e.total_vehicles),document.getElementById("statOverdue").textContent=c(e.overdue_count),document.getElementById("statUpcoming").textContent=c(e.upcoming_this_month),document.getElementById("statCost").textContent=i(e.total_cost_month)})).catch((function(){}))}function s(){var t=(document.getElementById("searchInput")||{}).value||"",o=e+"/vehicles?page="+a+"&per_page=50";t&&(o+="&q="+encodeURIComponent(t)),fetch(o,{headers:l()}).then((function(e){return e.json()})).then((function(e){var t;(function(e){var t=document.getElementById("vehicleGrid");if(!e.length)return void(t.innerHTML='<div class="empty-state"><div class="empty-state__icon">&#x1F69A;</div><div class="empty-state__text">No hay vehiculos registrados</div><button class="btn btn--primary" onclick="Fleet.openVehicleModal()">+ Agregar Vehiculo</button></div>');var n="";e.forEach((function(e){var t=(e.make||"")+" "+(e.model||"");e.year&&(t+=" "+e.year),n+='<div class="vehicle-card" onclick="Fleet.viewVehicle('+e.id+')"><div class="vehicle-card__header"><span class="vehicle-card__plate">'+d(e.plate||"SIN PLACA")+'</span><span class="badge '+(e.is_active?"badge--active":"badge--inactive")+'">'+(e.is_active?"Activo":"Inactivo")+'</span></div><div class="vehicle-card__info"><div><strong>'+d(t.trim())+"</strong></div>"+(e.owner_name?"<div>"+d(e.owner_name)+"</div>":"")+(e.color?"<div>Color: "+d(e.color)+"</div>":"")+'</div><div class="vehicle-card__footer"><span>'+c(e.current_mileage)+" km</span><span>"+d(e.fuel_type||"")+"</span></div></div>"})),t.innerHTML=n})(n=e.data||[]),function(e){var t=document.getElementById("vehiclePagination");if(!e||e.total_pages<=1)return void(t.innerHTML="");t.innerHTML='<button class="pagination__btn" '+(e.page<=1?"disabled":"")+' onclick="Fleet.goPage('+(e.page-1)+')">&laquo; Anterior</button><span class="pagination__info">Pagina '+e.page+" de "+e.total_pages+" ("+e.total+' vehiculos)</span><button class="pagination__btn" '+(e.page>=e.total_pages?"disabled":"")+' onclick="Fleet.goPage('+(e.page+1)+')">Siguiente &raquo;</button>'}(e.pagination),t='<option value="">-- Seleccionar vehiculo --</option>',n.forEach((function(e){var n=(e.plate||"S/P")+" - "+(e.make||"")+" "+(e.model||"");t+='<option value="'+e.id+'">'+d(n.trim())+"</option>"})),["schedVehicleSelect","logVehicleSelect"].forEach((function(e){var n=document.getElementById(e);n&&(n.innerHTML=t)}))})).catch((function(){document.getElementById("vehicleGrid").innerHTML='<div class="empty-state"><div class="empty-state__text">Error al cargar vehiculos</div></div>'}))}function m(e){var t=document.getElementById("vehicleModal"),n=document.getElementById("vehicleModalTitle");e&&e.id?(n.textContent="Editar Vehiculo",document.getElementById("vehEditId").value=e.id,document.getElementById("vehPlate").value=e.plate||"",document.getElementById("vehVin").value=e.vin||"",document.getElementById("vehMake").value=e.make||"",document.getElementById("vehModel").value=e.model||"",document.getElementById("vehYear").value=e.year||"",document.getElementById("vehMileage").value=e.current_mileage||0,document.getElementById("vehFuel").value=e.fuel_type||"gasolina",document.getElementById("vehColor").value=e.color||"",document.getElementById("vehOwner").value=e.owner_name||"",document.getElementById("vehNotes").value=e.notes||""):(n.textContent="Nuevo Vehiculo",document.getElementById("vehEditId").value="",["vehPlate","vehVin","vehMake","vehModel","vehYear","vehColor","vehOwner","vehNotes"].forEach((function(e){document.getElementById(e).value=""})),document.getElementById("vehMileage").value="0",document.getElementById("vehFuel").value="gasolina"),t.classList.add("is-open")}function v(){document.getElementById("vehicleModal").classList.remove("is-open")}function h(){fetch(e+"/vehicles?per_page=200",{headers:l()}).then((function(e){return e.json()})).then((function(t){var n=(t.data||[]).map((function(t){return fetch(e+"/vehicles/"+t.id+"/schedules",{headers:l()}).then((function(e){return e.json()})).then((function(e){return{vehicle:t,schedules:e.data||[]}}))}));return Promise.all(n)})).then((function(e){!function(e){var t=document.getElementById("maintBody"),n=[];if(e.forEach((function(e){e.schedules.forEach((function(t){n.push({vehicle:e.vehicle,schedule:t})}))})),!n.length)return void(t.innerHTML='<tr><td colspan="7" style="text-align:center;padding:var(--space-6);color:var(--color-text-muted);">No hay programas de mantenimiento.<br><button class="btn btn--primary btn--sm" style="margin-top:var(--space-3);" onclick="Fleet.openScheduleModal()">+ Crear Programa</button></td></tr>');p||(p=new VirtualScroll({container:t,rowHeight:64,buffer:3,renderRow:g,emptyHtml:'<tr><td colspan="7" style="text-align:center;padding:var(--space-6);color:var(--color-text-muted);">No hay programas de mantenimiento.</td></tr>'}));p.setData(n)}(e)})).catch((function(){document.getElementById("maintBody").innerHTML='<tr><td colspan="7" style="text-align:center;color:var(--color-text-muted);">Error al cargar</td></tr>'}))}function g(e){var t=e.vehicle,n=e.schedule,a=new Date,o=!1;n.next_due_at&&new Date(n.next_due_at)<a&&(o=!0),n.next_due_km&&n.next_due_km<=t.current_mileage&&(o=!0);var l="";n.interval_km&&(l+=c(n.interval_km)+" km"),n.interval_km&&n.interval_months&&(l+=" / "),n.interval_months&&(l+=n.interval_months+" meses");var i="";return n.next_due_at&&(i+=r(n.next_due_at)),n.next_due_at&&n.next_due_km&&(i+=" / "),n.next_due_km&&(i+=c(n.next_due_km)+" km"),"<tr><td><strong>"+d(t.plate||"S/P")+'</strong><br><span style="font-size:var(--text-caption);color:var(--color-text-muted);">'+d((t.make||"")+" "+(t.model||""))+"</span></td><td>"+d(n.maintenance_type)+'</td><td class="mono">'+(l||"—")+"</td><td>"+r(n.last_done_at)+(n.last_done_km?'<br><span class="mono" style="font-size:var(--text-caption);">'+c(n.last_done_km)+" km</span>":"")+"</td><td>"+(i||"—")+'</td><td><span class="badge '+(o?"badge--overdue":"badge--active")+'">'+(o?"Vencido":"Al dia")+'</span></td><td><button class="btn btn--sm btn--ghost" onclick="Fleet.openLogModalFor('+t.id+","+n.id+",'"+d(n.maintenance_type)+"')\">Registrar</button></td></tr>"}var p=null;function y(){fetch(e+"/vehicles?per_page=200",{headers:l()}).then((function(e){return e.json()})).then((function(t){var n=(t.data||[]).map((function(t){return fetch(e+"/vehicles/"+t.id,{headers:l()}).then((function(e){return e.json()})).then((function(e){return{vehicle:t,logs:e.recent_logs||[]}}))}));return Promise.all(n)})).then((function(e){!function(e){var t=document.getElementById("historyBody"),n=[];if(e.forEach((function(e){e.logs.forEach((function(t){t._plate=e.vehicle.plate||"S/P",t._make=(e.vehicle.make||"")+" "+(e.vehicle.model||""),n.push(t)}))})),n.sort((function(e,t){return new Date(t.created_at)-new Date(e.created_at)})),!n.length)return void(t.innerHTML='<tr><td colspan="7" style="text-align:center;padding:var(--space-6);color:var(--color-text-muted);">No hay registros de mantenimiento</td></tr>');_||(_=new VirtualScroll({container:t,rowHeight:48,buffer:3,renderRow:f,emptyHtml:'<tr><td colspan="7" style="text-align:center;padding:var(--space-6);color:var(--color-text-muted);">No hay registros de mantenimiento</td></tr>'}));_.setData(n)}(e)})).catch((function(){document.getElementById("historyBody").innerHTML='<tr><td colspan="7" style="text-align:center;color:var(--color-text-muted);">Error al cargar</td></tr>'}))}function f(e){return"<tr><td>"+r(e.created_at)+"</td><td><strong>"+d(e._plate)+'</strong><br><span style="font-size:var(--text-caption);color:var(--color-text-muted);">'+d(e._make)+"</span></td><td>"+d(e.maintenance_type)+'</td><td class="mono">'+c(e.mileage_at)+'</td><td class="mono">'+i(e.cost)+"</td><td>"+d(e.employee_name||"—")+'</td><td style="max-width:200px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;">'+d(e.notes||"—")+"</td></tr>"}var _=null;function E(){fetch(e+"/alerts",{headers:l()}).then((function(e){return e.json()})).then((function(e){!function(e){var t=document.getElementById("alertsList");if(!e.length)return void(t.innerHTML='<div class="empty-state"><div class="empty-state__icon" style="color:#3FB950;">&#10003;</div><div class="empty-state__text">No hay mantenimientos vencidos</div></div>');var n="";e.forEach((function(e){var t="";e.next_due_at&&(t+="Vencio: "+r(e.next_due_at)),e.next_due_km&&(t+=(t?" | ":"")+"Limite: "+c(e.next_due_km)+" km (actual: "+c(e.current_mileage)+" km)"),n+='<div class="alert-card"><div class="alert-card__info"><div class="alert-card__vehicle">'+d(e.plate||"S/P")+" — "+d((e.make||"")+" "+(e.model||""))+(e.year?" "+e.year:"")+'</div><div class="alert-card__detail"><span class="badge badge--overdue">'+d(e.maintenance_type)+"</span> &nbsp; "+t+'</div></div><button class="btn btn--sm btn--primary" onclick="Fleet.openLogModalFor('+e.vehicle_id+","+e.schedule_id+",'"+d(e.maintenance_type)+"')\">Registrar Mant.</button></div>"})),t.innerHTML=n}(e.data||[])})).catch((function(){document.getElementById("alertsList").innerHTML='<div class="empty-state"><div class="empty-state__text">Error al cargar alertas</div></div>'}))}function I(){document.getElementById("scheduleModal").classList.remove("is-open")}function B(){var e=document.getElementById("logModal");document.getElementById("logScheduleSelect").innerHTML='<option value="">-- Sin programa --</option>',document.getElementById("logType").value="",document.getElementById("logMileage").value="",document.getElementById("logCost").value="",document.getElementById("logParts").value="",document.getElementById("logNotes").value="",e.classList.add("is-open")}function b(){document.getElementById("logModal").classList.remove("is-open")}return document.addEventListener("DOMContentLoaded",(function(){document.querySelectorAll(".tab-btn").forEach((function(e){e.addEventListener("click",(function(){var e=this.getAttribute("data-tab");document.querySelectorAll(".tab-btn").forEach((function(e){e.classList.remove("is-active")})),document.querySelectorAll(".tab-panel").forEach((function(e){e.classList.remove("is-active")})),this.classList.add("is-active"),document.getElementById("tab-"+e).classList.add("is-active"),"maintenance"===e&&h(),"history"===e&&y(),"alerts"===e&&E()}))}));var e=document.getElementById("searchInput");e&&e.addEventListener("input",(function(){clearTimeout(o),o=setTimeout((function(){a=1,s()}),300)})),document.getElementById("btnNewVehicle").addEventListener("click",(function(){m()})),u(),s()})),{openVehicleModal:m,closeVehicleModal:v,saveVehicle:function(){var t=document.getElementById("vehEditId").value,n={plate:document.getElementById("vehPlate").value.trim(),vin:document.getElementById("vehVin").value.trim(),make:document.getElementById("vehMake").value.trim(),model:document.getElementById("vehModel").value.trim(),year:parseInt(document.getElementById("vehYear").value)||null,current_mileage:parseInt(document.getElementById("vehMileage").value)||0,fuel_type:document.getElementById("vehFuel").value,color:document.getElementById("vehColor").value.trim(),owner_name:document.getElementById("vehOwner").value.trim(),notes:document.getElementById("vehNotes").value.trim()};if(n.plate||n.vin){var a=e+"/vehicles",o="POST";t&&(a+="/"+t,o="PUT"),fetch(a,{method:o,headers:l(),body:JSON.stringify(n)}).then((function(e){return e.json()})).then((function(e){e.error?alert(e.error):(v(),s(),u())})).catch((function(e){alert("Error: "+e.message)}))}else alert("Se requiere placa o VIN")},viewVehicle:function(t){fetch(e+"/vehicles/"+t,{headers:l()}).then((function(e){return e.json()})).then((function(e){m(e)}))},goPage:function(e){a=e,s()},openScheduleModal:function(e){var t=document.getElementById("scheduleModal");document.getElementById("schedType").value="",document.getElementById("schedIntervalKm").value="",document.getElementById("schedIntervalMonths").value="",document.getElementById("schedNextDate").value="",document.getElementById("schedNextKm").value="",document.getElementById("schedNotes").value="",e&&(document.getElementById("schedVehicleSelect").value=e),t.classList.add("is-open")},closeScheduleModal:I,saveSchedule:function(){var t=document.getElementById("schedVehicleSelect").value;if(t){var n=document.getElementById("schedType").value.trim();if(n){var a={maintenance_type:n,interval_km:parseInt(document.getElementById("schedIntervalKm").value)||null,interval_months:parseInt(document.getElementById("schedIntervalMonths").value)||null,next_due_at:document.getElementById("schedNextDate").value||null,next_due_km:parseInt(document.getElementById("schedNextKm").value)||null,notes:document.getElementById("schedNotes").value.trim()};fetch(e+"/vehicles/"+t+"/schedules",{method:"POST",headers:l(),body:JSON.stringify(a)}).then((function(e){return e.json()})).then((function(e){e.error?alert(e.error):(I(),h(),u())})).catch((function(e){alert("Error: "+e.message)}))}else alert("Ingrese el tipo de mantenimiento")}else alert("Seleccione un vehiculo")},openLogModal:B,openLogModalFor:function(t,a,o){B(),document.getElementById("logVehicleSelect").value=t,o&&(document.getElementById("logType").value=o),fetch(e+"/vehicles/"+t+"/schedules",{headers:l()}).then((function(e){return e.json()})).then((function(e){var t='<option value="">-- Sin programa --</option>';(e.data||[]).forEach((function(e){var n=e.id==a?" selected":"";t+='<option value="'+e.id+'"'+n+">"+d(e.maintenance_type)+"</option>"})),document.getElementById("logScheduleSelect").innerHTML=t}));var c=n.find((function(e){return e.id==t}));c&&(document.getElementById("logMileage").value=c.current_mileage||"")},closeLogModal:b,saveLog:function(){var t=document.getElementById("logVehicleSelect").value;if(t){var n=document.getElementById("logType").value.trim();if(n){var a={schedule_id:parseInt(document.getElementById("logScheduleSelect").value)||null,maintenance_type:n,mileage_at:parseInt(document.getElementById("logMileage").value)||null,cost:parseFloat(document.getElementById("logCost").value)||0,parts_used:document.getElementById("logParts").value.trim(),notes:document.getElementById("logNotes").value.trim()};fetch(e+"/vehicles/"+t+"/log",{method:"POST",headers:l(),body:JSON.stringify(a)}).then((function(e){return e.json()})).then((function(e){if(e.error)alert(e.error);else{b(),u();var t=document.querySelector(".tab-btn.is-active");if(t){var n=t.getAttribute("data-tab");"maintenance"===n&&h(),"history"===n&&y(),"alerts"===n&&E(),"vehicles"===n&&s()}}})).catch((function(e){alert("Error: "+e.message)}))}else alert("Ingrese el tipo de mantenimiento")}else alert("Seleccione un vehiculo")}}}();
\ No newline at end of file
diff --git a/pos/static/js/inventory.js b/pos/static/js/inventory.js
index ea326a1..4f5b6f6 100644
--- a/pos/static/js/inventory.js
+++ b/pos/static/js/inventory.js
@@ -47,6 +47,79 @@
         return d.innerHTML;
     }
 
+    // --- Dashboard summary badges ---
+    function loadSummary() {
+        apiFetch(API + '/summary').then(function(data) {
+            if (!data) return;
+            var totalSkusEl = document.getElementById('inv-total-skus');
+            var totalValueEl = document.getElementById('inv-total-value');
+            var lowStockEl = document.getElementById('inv-low-stock');
+            var noMovementEl = document.getElementById('inv-no-movement');
+            if (totalSkusEl) totalSkusEl.textContent = (data.total_skus || 0).toLocaleString('es-MX');
+            if (totalValueEl) totalValueEl.textContent = '$' + (data.total_value || 0).toLocaleString('es-MX', {minimumFractionDigits: 2, maximumFractionDigits: 2});
+            if (lowStockEl) lowStockEl.textContent = (data.low_stock || 0).toLocaleString('es-MX');
+            if (noMovementEl) noMovementEl.textContent = (data.no_movement || 0).toLocaleString('es-MX');
+        }).catch(function(err) {
+            console.error('Inventory summary load failed:', err);
+        });
+    }
+    loadSummary();
+
+    // --- Global tier discounts ---
+    var globalDiscounts = { 2: 15, 3: 25 };
+    function loadTierDiscounts() {
+        apiFetch(API + '/tier-discounts').then(function(data) {
+            if (data && data.data) {
+                data.data.forEach(function(d) {
+                    globalDiscounts[d.tier_id] = d.discount_pct;
+                });
+            }
+            var discEl = document.getElementById('tierDiscountBadge');
+            if (discEl) {
+                discEl.textContent = 'Taller -' + globalDiscounts[2] + '% · Mayoreo -' + globalDiscounts[3] + '%';
+            }
+        });
+    }
+    loadTierDiscounts();
+
+    function showTierDiscountModal() {
+        document.getElementById('tierDisc2').value = globalDiscounts[2];
+        document.getElementById('tierDisc3').value = globalDiscounts[3];
+        document.getElementById('tierDiscountModal').classList.add('is-open');
+    }
+    function closeTierDiscountModal() {
+        document.getElementById('tierDiscountModal').classList.remove('is-open');
+    }
+    function saveTierDiscounts() {
+        var d2 = parseFloat(document.getElementById('tierDisc2').value) || 0;
+        var d3 = parseFloat(document.getElementById('tierDisc3').value) || 0;
+        fetch(API + '/tier-discounts', {
+            method: 'PUT',
+            headers: { 'Authorization': 'Bearer ' + token, 'Content-Type': 'application/json' },
+            body: JSON.stringify({ discount_pct_2: d2, discount_pct_3: d3 })
+        }).then(function(r) { return r.json(); })
+          .then(function(res) {
+              showToast(res.message || 'Guardado', 'ok');
+              globalDiscounts[2] = d2;
+              globalDiscounts[3] = d3;
+              var discEl = document.getElementById('tierDiscountBadge');
+              if (discEl) {
+                  discEl.textContent = 'Taller -' + d2 + '% · Mayoreo -' + d3 + '%';
+              }
+              closeTierDiscountModal();
+          }).catch(function() {
+              showToast('Error al guardar descuentos', 'error');
+          });
+    }
+
+    // Handle hash-based tab switching (e.g. /pos/inventory#alertas)
+    (function handleHashTab() {
+        var hash = window.location.hash.replace('#', '');
+        if (hash && ['stock', 'entradas', 'salidas', 'traspasos', 'ajustes', 'conteos', 'alertas'].indexOf(hash) !== -1) {
+            setTimeout(function() { switchTab(hash); }, 100);
+        }
+    })();
+
     // =====================================================================
     //  TAB SWITCHING — uses design-system switchTab() already in the HTML.
     //  We hook into it to trigger data loads when tabs are activated.
@@ -63,8 +136,12 @@
     //  STOCK / PRODUCTS  (panel-stock)
     // =====================================================================
 
+    var selectedItems = new Set();
+
     function renderInventoryRow(it) {
+        var isChecked = selectedItems.has(it.id) ? 'checked' : '';
         return '<tr style="cursor:pointer;" onclick="viewProductDetail(' + it.id + ')">' +
+            '<td onclick="event.stopPropagation();"><input type="checkbox" class="item-checkbox" data-id="' + it.id + '" ' + isChecked + ' onclick="event.stopPropagation();toggleItemSelection(' + it.id + ')"></td>' +
             '<td class="td--mono" style="font-size:var(--text-caption);color:var(--color-text-muted);">' + it.id + '</td>' +
             '<td class="td--mono">' + esc(it.barcode) + '</td>' +
             '<td class="td--mono">' + esc(it.part_number) + '</td>' +
@@ -79,10 +156,50 @@
             '<td>' +
             '<button class="btn btn--ghost btn--sm" onclick="event.stopPropagation();viewHistory(' + it.id + ')">Historial</button> ' +
             '<button class="btn btn--ghost btn--sm" style="color:var(--color-accent);" onclick="event.stopPropagation();showPurchaseModalForItem(' + it.id + ')">Entrada</button> ' +
-            '<button class="btn btn--ghost btn--sm" onclick="event.stopPropagation();printBarcode(\'' + esc(it.barcode) + '\',\'' + esc(it.part_number) + '\',\'' + esc(it.name) + '\')">Etiqueta</button>' +
+            '<button class="btn btn--sm btn--meli" onclick="event.stopPropagation();publishToMeli(' + it.id + ')">ML</button> ' +
+            '<button class="btn btn--ghost btn--sm" onclick="event.stopPropagation();printBarcode(\'' + esc(it.barcode) + '\',\'' + esc(it.part_number) + '\',\'' + esc(it.name) + '\')">Etiqueta</button> ' +
+            '<button class="btn btn--ghost btn--sm" style="color:var(--color-error);" onclick="event.stopPropagation();deleteItem(' + it.id + ')">Eliminar</button>' +
             '</td></tr>';
     }
 
+    window.toggleItemSelection = function(id) {
+        if (selectedItems.has(id)) {
+            selectedItems.delete(id);
+        } else {
+            selectedItems.add(id);
+        }
+        updateSelectionUI();
+    };
+
+    window.toggleSelectAllItems = function() {
+        var cb = document.getElementById('selectAllItems');
+        var allChecked = cb.checked;
+        // We need to get all visible items from inventoryVS
+        if (inventoryVS && inventoryVS.data) {
+            inventoryVS.data.forEach(function(it) {
+                if (allChecked) selectedItems.add(it.id);
+                else selectedItems.delete(it.id);
+            });
+            inventoryVS.refresh();
+        }
+        updateSelectionUI();
+    };
+
+    function updateSelectionUI() {
+        var count = selectedItems.size;
+        var btn = document.getElementById('btnPublishML');
+        var badge = document.getElementById('meliSelectedCountBadge');
+        if (btn) btn.style.display = count > 0 ? 'inline-flex' : 'none';
+        if (badge) badge.textContent = count;
+        // Update select-all checkbox state
+        var selectAll = document.getElementById('selectAllItems');
+        if (selectAll && inventoryVS && inventoryVS.data) {
+            var visibleIds = inventoryVS.data.map(function(it) { return it.id; });
+            var allSelected = visibleIds.length > 0 && visibleIds.every(function(id) { return selectedItems.has(id); });
+            selectAll.checked = allSelected;
+        }
+    }
+
     function loadItems(page, search) {
         currentPage = page || 1;
         currentSearch = search !== undefined ? search : currentSearch;
@@ -220,7 +337,7 @@
                 loadItems(currentPage);
                 // Close modal, clear form, refresh badges
                 closeCreateModal();
-                ['newPartNumber','newName','newBrand','newBarcode','newCost','newPrice1','newPrice2','newPrice3','newMinStock','newInitialStock','newLocation'].forEach(function(id) {
+                ['newPartNumber','newName','newBrand','newBarcode','newCost','newPrice1','newMinStock','newInitialStock','newLocation'].forEach(function(id) {
                     var el = document.getElementById(id);
                     if (el) el.value = '';
                 });
@@ -634,6 +751,195 @@
         document.getElementById('historyModal').classList.remove('is-open');
     }
 
+    // =====================================================================
+    //  DELETE ITEM
+    // =====================================================================
+
+    function deleteItem(itemId) {
+        if (!confirm('¿Eliminar este artículo del inventario? Se mantendrán los registros históricos.')) return;
+        var token = localStorage.getItem('pos_token') || '';
+        fetch(API + '/items/' + itemId, {
+            method: 'DELETE',
+            headers: token ? { 'Authorization': 'Bearer ' + token } : {}
+        }).then(function(r) { return r.json(); })
+          .then(function(data) {
+              if (data.error) { alert('Error: ' + data.error); return; }
+              showToast('Artículo eliminado');
+              loadItems(currentPage);
+              if (window.loadInventoryStats) window.loadInventoryStats();
+          }).catch(function() { alert('Error al eliminar artículo'); });
+    }
+
+    // =====================================================================
+    //  MERCADOLIBRE PUBLISH
+    // =====================================================================
+
+    function publishToMeli(itemId) {
+        selectedItems.clear();
+        selectedItems.add(itemId);
+        updateSelectionUI();
+        openMeliPublishModal();
+    }
+    window.publishToMeli = publishToMeli;
+
+    // ─── MercadoLibre Bulk Publish Modal ───────────────────────────────────
+
+    window.openMeliPublishModal = function() {
+        if (selectedItems.size === 0) { showToast('Selecciona al menos un producto', 'warn'); return; }
+        document.getElementById('meliPublishModal').classList.add('is-open');
+        document.getElementById('meliPublishResult').innerHTML = '';
+        document.getElementById('meliCategoryId').value = '';
+        document.getElementById('meliCategorySearch').value = '';
+        document.getElementById('meliCategoryResults').innerHTML = '';
+        refreshMeliPublishPreview();
+    };
+
+    window.closeMeliPublishModal = function() {
+        document.getElementById('meliPublishModal').classList.remove('is-open');
+    };
+
+    function refreshMeliPublishPreview() {
+        var container = document.getElementById('meliPublishItemsPreview');
+        var countEl = document.getElementById('meliPublishSelectedCount');
+        countEl.textContent = selectedItems.size + ' producto(s) seleccionado(s)';
+        if (!inventoryVS || !inventoryVS.data) { container.innerHTML = '<p style="color:var(--color-text-muted);">Sin datos</p>'; return; }
+        var items = inventoryVS.data.filter(function(it) { return selectedItems.has(it.id); });
+        if (!items.length) { container.innerHTML = '<p style="color:var(--color-text-muted);">Ninguno</p>'; return; }
+        var html = '<table class="data-table" style="font-size:var(--text-caption);"><thead><tr><th>ID</th><th>No. Parte</th><th>Nombre</th><th>Stock</th><th style="text-align:right">Precio</th></tr></thead><tbody>';
+        items.forEach(function(it) {
+            html += '<tr><td>' + it.id + '</td><td class="td--mono">' + esc(it.part_number) + '</td><td>' + esc(it.name) + '</td><td>' + it.stock + '</td><td style="text-align:right">$' + fmt(it.price_1) + '</td></tr>';
+        });
+        html += '</tbody></table>';
+        container.innerHTML = html;
+    }
+
+    var meliCategorySearchTimeout;
+    var meliCatItems = [];
+    var meliCatActiveIndex = -1;
+
+    window.searchMeliCategories = function() {
+        var q = document.getElementById('meliCategorySearch').value.trim();
+        var resultsDiv = document.getElementById('meliCategoryResults');
+        if (q.length < 2) { resultsDiv.innerHTML = ''; meliCatItems = []; meliCatActiveIndex = -1; return; }
+        clearTimeout(meliCategorySearchTimeout);
+        resultsDiv.innerHTML = '<div class="meli-cat-dropdown"><div class="meli-cat-loading">Buscando...</div></div>';
+        meliCategorySearchTimeout = setTimeout(function() {
+            fetch('/pos/api/marketplace-ext/categories?q=' + encodeURIComponent(q), { headers: { 'Authorization': 'Bearer ' + token, 'Content-Type': 'application/json' } })
+                .then(function(r) { return r.json(); })
+                .then(function(data) {
+                    var cats = data.categories || [];
+                    meliCatItems = cats.slice(0, 10);
+                    meliCatActiveIndex = -1;
+                    if (!meliCatItems.length) { resultsDiv.innerHTML = '<div class="meli-cat-dropdown"><div class="meli-cat-empty">Sin resultados</div></div>'; return; }
+                    var html = '<div class="meli-cat-dropdown">';
+                    meliCatItems.forEach(function(c, idx) {
+                        html += '<div class="meli-cat-item" data-idx="' + idx + '" onmouseenter="highlightMeliCat(' + idx + ')" onmousedown="selectMeliCategoryIdx(' + idx + ')">' +
+                            '<span>' + esc(c.category_name || c.category_id) + '</span>' +
+                            '<span class="cat-id">' + esc(c.category_id) + '</span>' +
+                            '</div>';
+                    });
+                    html += '</div>';
+                    resultsDiv.innerHTML = html;
+                })
+                .catch(function() { resultsDiv.innerHTML = ''; meliCatItems = []; meliCatActiveIndex = -1; });
+        }, 300);
+    };
+
+    window.highlightMeliCat = function(idx) {
+        meliCatActiveIndex = idx;
+        var items = document.querySelectorAll('.meli-cat-item');
+        items.forEach(function(el, i) { el.classList.toggle('is-active', i === idx); });
+    };
+
+    window.selectMeliCategoryIdx = function(idx) {
+        var c = meliCatItems[idx];
+        if (!c) return;
+        selectMeliCategory(c.category_id, c.category_name || c.category_id);
+    };
+
+    window.selectMeliCategory = function(id, name) {
+        document.getElementById('meliCategoryId').value = id;
+        document.getElementById('meliCategorySearch').value = name;
+        document.getElementById('meliCategoryResults').innerHTML = '';
+        meliCatItems = [];
+        meliCatActiveIndex = -1;
+    };
+
+    window.handleMeliCatKeydown = function(e) {
+        if (!meliCatItems.length) return;
+        if (e.key === 'ArrowDown') {
+            e.preventDefault();
+            meliCatActiveIndex = Math.min(meliCatActiveIndex + 1, meliCatItems.length - 1);
+            highlightMeliCat(meliCatActiveIndex);
+        } else if (e.key === 'ArrowUp') {
+            e.preventDefault();
+            meliCatActiveIndex = Math.max(meliCatActiveIndex - 1, -1);
+            highlightMeliCat(meliCatActiveIndex);
+        } else if (e.key === 'Enter') {
+            e.preventDefault();
+            if (meliCatActiveIndex >= 0) selectMeliCategoryIdx(meliCatActiveIndex);
+        } else if (e.key === 'Escape') {
+            document.getElementById('meliCategoryResults').innerHTML = '';
+            meliCatItems = [];
+            meliCatActiveIndex = -1;
+        }
+    };
+
+    /* Cerrar dropdown al hacer click fuera */
+    document.addEventListener('click', function(e) {
+        var field = document.getElementById('meliCategorySearch');
+        var results = document.getElementById('meliCategoryResults');
+        if (field && results && !field.contains(e.target) && !results.contains(e.target)) {
+            results.innerHTML = '';
+            meliCatItems = [];
+            meliCatActiveIndex = -1;
+        }
+    });
+
+    window.executeMeliPublish = function() {
+        var categoryId = document.getElementById('meliCategoryId').value.trim();
+        if (!categoryId) { document.getElementById('meliPublishResult').innerHTML = '<span style="color:var(--color-error);">Selecciona una categoría de MercadoLibre</span>'; return; }
+        var listingType = document.getElementById('meliListingType').value;
+        var shippingMode = document.getElementById('meliShippingMode').value;
+        var ids = Array.from(selectedItems);
+        var resultEl = document.getElementById('meliPublishResult');
+        var btn = document.getElementById('meliPublishBtn');
+        btn.disabled = true;
+        resultEl.innerHTML = '<span style="color:var(--color-text-muted);">Publicando ' + ids.length + ' producto(s)...</span>';
+        fetch('/pos/api/marketplace-ext/listings', {
+            method: 'POST',
+            headers: { 'Authorization': 'Bearer ' + token, 'Content-Type': 'application/json' },
+            body: JSON.stringify({
+                inventory_ids: ids,
+                category_id: categoryId,
+                listing_type: listingType,
+                shipping_mode: shippingMode
+            })
+        }).then(function(r) { return r.json(); })
+          .then(function(data) {
+              btn.disabled = false;
+              if (data.error) { resultEl.innerHTML = '<span style="color:var(--color-error);">Error: ' + esc(data.error) + '</span>'; return; }
+              var success = (data.success || []).length;
+              var failedList = data.failed || [];
+              var failed = failedList.length;
+              var html = '<div style="margin-bottom:var(--space-2);"><span style="color:var(--color-success);">✅ ' + success + ' publicado(s)</span> · <span style="color:var(--color-error);">❌ ' + failed + ' fallo(s)</span></div>';
+              if (failedList.length) {
+                  html += '<ul style="margin:0;padding-left:var(--space-4);font-size:var(--text-caption);color:var(--color-text-secondary);">';
+                  failedList.forEach(function(f) {
+                      html += '<li>Item #' + esc(f.inventory_id) + ': ' + esc(f.error) + '</li>';
+                  });
+                  html += '</ul>';
+              }
+              resultEl.innerHTML = html;
+              if (success > 0) {
+                  selectedItems.clear();
+                  updateSelectionUI();
+                  if (inventoryVS) inventoryVS.refresh();
+                  setTimeout(function() { closeMeliPublishModal(); }, 2500);
+              }
+          }).catch(function(e) { btn.disabled = false; resultEl.innerHTML = '<span style="color:var(--color-error);">Error: ' + esc(e.message) + '</span>'; });
+    };
+
     // =====================================================================
     //  BARCODE LABEL PRINT
     // =====================================================================
@@ -747,9 +1053,9 @@
             // Prices
             html += '<div style="display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:16px;padding-bottom:16px;border-bottom:1px solid var(--color-border);">';
             html += '<div><span style="font-size:var(--text-caption);color:var(--color-text-muted);text-transform:uppercase;display:block;">Costo</span><span class="td--amount">$' + fmt(data.cost) + '</span></div>';
-            html += '<div><span style="font-size:var(--text-caption);color:var(--color-text-muted);text-transform:uppercase;display:block;">Precio 1</span><span class="td--amount">$' + fmt(data.price_1) + '</span></div>';
-            html += '<div><span style="font-size:var(--text-caption);color:var(--color-text-muted);text-transform:uppercase;display:block;">Precio 2</span><span class="td--amount">$' + fmt(data.price_2) + '</span></div>';
-            html += '<div><span style="font-size:var(--text-caption);color:var(--color-text-muted);text-transform:uppercase;display:block;">Precio 3</span><span class="td--amount">$' + fmt(data.price_3) + '</span></div>';
+            html += '<div><span style="font-size:var(--text-caption);color:var(--color-text-muted);text-transform:uppercase;display:block;">Mostrador</span><span class="td--amount">$' + fmt(data.price_1) + '</span></div>';
+            html += '<div><span style="font-size:var(--text-caption);color:var(--color-text-muted);text-transform:uppercase;display:block;">Taller</span><span class="td--amount">$' + fmt(data.price_2) + '</span><span style="font-size:var(--text-caption);color:var(--color-text-muted);"> (-' + globalDiscounts[2] + '%)</span></div>';
+            html += '<div><span style="font-size:var(--text-caption);color:var(--color-text-muted);text-transform:uppercase;display:block;">Mayoreo</span><span class="td--amount">$' + fmt(data.price_3) + '</span><span style="font-size:var(--text-caption);color:var(--color-text-muted);"> (-' + globalDiscounts[3] + '%)</span></div>';
             html += '</div>';
 
             // Cross-references section
@@ -950,6 +1256,7 @@
     window.cancelDraft = cancelDraft;
     window.loadAlerts = loadAlerts;
     window.printBarcode = printBarcode;
+    window.deleteItem = deleteItem;
     window.autoMatchCompat = autoMatchCompat;
     window.removeCompat = removeCompat;
 
diff --git a/pos/static/js/kiosk.js b/pos/static/js/kiosk.js
index 1db5e33..3ac626b 100644
--- a/pos/static/js/kiosk.js
+++ b/pos/static/js/kiosk.js
@@ -154,6 +154,9 @@
     }
   };
 
+  // Expose for other scripts
+  window.isKioskEnabled = isKioskEnabled;
+
   // ─── Init ───
   if (isKioskEnabled()) {
     activate();
diff --git a/pos/static/js/marketplace_external.js b/pos/static/js/marketplace_external.js
new file mode 100644
index 0000000..476ef5f
--- /dev/null
+++ b/pos/static/js/marketplace_external.js
@@ -0,0 +1,367 @@
+/**
+ * marketplace_external.js — MercadoLibre integration UI
+ */
+(function() {
+    'use strict';
+
+    var API = '/pos/api/marketplace-ext';
+    var TOKEN = localStorage.getItem('pos_token') || '';
+
+    function headers() {
+        return {
+            'Authorization': 'Bearer ' + TOKEN,
+            'Content-Type': 'application/json',
+            'X-Device-Id': localStorage.getItem('pos_device_id') || 'web',
+        };
+    }
+
+    // ─── Tabs ──────────────────────────────────────────────────────────────
+
+    window.switchTab = function(tab) {
+        document.querySelectorAll('.tab-btn').forEach(function(b) {
+            b.classList.toggle('is-active', b.dataset.tab === tab);
+            b.setAttribute('aria-selected', b.dataset.tab === tab ? 'true' : 'false');
+        });
+        document.querySelectorAll('.tab-panel').forEach(function(p) {
+            p.classList.toggle('is-active', p.id === 'panel-' + tab);
+        });
+        if (tab === 'listings') loadListings();
+        if (tab === 'orders') loadOrders();
+    };
+
+    function closeModal(id) {
+        document.getElementById(id).classList.remove('is-open');
+    }
+    window.closeModal = closeModal;
+
+    // ─── Config / Connection ───────────────────────────────────────────────
+
+    async function loadConfig() {
+        try {
+            var res = await fetch(API + '/config', { headers: headers() });
+            if (!res.ok) throw new Error('Failed to load config');
+            var cfg = await res.json();
+
+            var statusDiv = document.getElementById('configStatus');
+            var formDiv = document.getElementById('configForm');
+            var connectedDiv = document.getElementById('configConnected');
+
+            if (cfg.connected) {
+                statusDiv.innerHTML = '<span class="meli-status meli-status--active">● Conectado</span>';
+                formDiv.style.display = 'none';
+                connectedDiv.style.display = 'block';
+                document.getElementById('connectedNickname').textContent = cfg.meli_user_id || 'Usuario ML';
+                document.getElementById('connectedSite').textContent = cfg.meli_site_id || 'MLM';
+            } else {
+                statusDiv.innerHTML = '<span class="meli-status meli-status--pending">● No conectado</span>';
+                formDiv.style.display = 'block';
+                connectedDiv.style.display = 'none';
+            }
+        } catch (e) {
+            console.error(e);
+            document.getElementById('configStatus').innerHTML = '<p style="color:var(--color-danger);">Error cargando configuración</p>';
+        }
+    }
+
+    window.startOAuth = function() {
+        var clientId = document.getElementById('cfgClientId').value.trim();
+        var clientSecret = document.getElementById('cfgClientSecret').value.trim();
+        var category = document.getElementById('cfgCategory').value.trim();
+        var shipping = document.getElementById('cfgShipping').value;
+
+        if (!clientId || !clientSecret) {
+            alert('Client ID y Client Secret son requeridos');
+            return;
+        }
+
+        // Save config locally for the callback
+        localStorage.setItem('meli_client_id', clientId);
+        localStorage.setItem('meli_client_secret', clientSecret);
+        localStorage.setItem('meli_category', category);
+        localStorage.setItem('meli_shipping', shipping);
+
+        var redirectUri = window.location.origin + '/pos/marketplace-external/callback';
+        var authUrl = 'https://auth.mercadolibre.com.mx/authorization?response_type=code&client_id=' + encodeURIComponent(clientId) + '&redirect_uri=' + encodeURIComponent(redirectUri);
+        window.location.href = authUrl;
+    };
+
+    window.disconnectMeli = async function() {
+        if (!confirm('¿Desconectar MercadoLibre? Las publicaciones existentes no se eliminarán de ML.')) return;
+        try {
+            var res = await fetch(API + '/connect', { method: 'DELETE', headers: headers() });
+            if (res.ok) {
+                loadConfig();
+            } else {
+                alert('Error desconectando');
+            }
+        } catch (e) {
+            alert('Error: ' + e.message);
+        }
+    };
+
+    // ─── Listings ──────────────────────────────────────────────────────────
+
+    var listingsData = [];
+
+    window.loadListings = async function() {
+        var container = document.getElementById('listingsContainer');
+        container.innerHTML = '<p>Cargando...</p>';
+        try {
+            var res = await fetch(API + '/listings?page=1&per_page=50', { headers: headers() });
+            if (!res.ok) throw new Error('Failed to load listings');
+            var data = await res.json();
+            listingsData = data.items || [];
+            renderListings();
+        } catch (e) {
+            container.innerHTML = '<p style="color:var(--color-danger);">Error cargando publicaciones</p>';
+        }
+    };
+
+    function renderListings() {
+        var container = document.getElementById('listingsContainer');
+        var statusFilter = document.getElementById('listingStatusFilter').value;
+        var search = document.getElementById('listingSearch').value.toLowerCase();
+
+        var filtered = listingsData.filter(function(l) {
+            if (statusFilter && l.external_status !== statusFilter) return false;
+            if (search && !((l.title || '').toLowerCase().includes(search))) return false;
+            return true;
+        });
+
+        if (!filtered.length) {
+            container.innerHTML = '<p style="color:var(--color-text-muted);padding:var(--space-4);">No hay publicaciones. Ve a Inventario y publica un producto.</p>';
+            return;
+        }
+
+        container.innerHTML = filtered.map(function(l) {
+            var statusClass = 'meli-status--' + (l.external_status || 'pending');
+            return '<div class="meli-card">'
+                + '<div style="display:flex;justify-content:space-between;align-items:start;margin-bottom:var(--space-3);">'
+                +   '<div style="font-weight:700;font-size:var(--text-body-sm);line-height:1.3;">' + escapeHtml(l.title || l.inventory_name || 'Sin título') + '</div>'
+                +   '<span class="meli-status ' + statusClass + '">' + (l.external_status || '—') + '</span>'
+                + '</div>'
+                + '<div style="font-size:var(--text-caption);color:var(--color-text-muted);margin-bottom:var(--space-2);">'
+                +   'SKU: ' + escapeHtml(l.part_number || '—') + ' · ID ML: ' + escapeHtml(l.external_item_id || '—')
+                + '</div>'
+                + '<div style="display:flex;gap:var(--space-2);margin-top:var(--space-3);">'
+                +   '<button class="btn btn--ghost btn--xs" onclick="syncListing(' + l.id + ')">Sync</button>'
+                +   (l.external_status === 'active' ? '<button class="btn btn--ghost btn--xs" onclick="pauseListing(' + l.id + ')">Pausar</button>' : '<button class="btn btn--ghost btn--xs" onclick="activateListing(' + l.id + ')">Activar</button>')
+                +   '<button class="btn btn--danger btn--xs" onclick="deleteListing(' + l.id + ')">Cerrar</button>'
+                + '</div>'
+                + '</div>';
+        }).join('');
+    }
+
+    window.filterListings = renderListings;
+
+    window.syncListing = async function(id) {
+        try {
+            var res = await fetch(API + '/listings/' + id + '/sync', { method: 'POST', headers: headers() });
+            var data = await res.json();
+            if (res.ok) {
+                alert('Sincronizado: $' + data.price + ' · Stock: ' + data.stock);
+                loadListings();
+            } else {
+                alert('Error: ' + (data.error || 'Unknown'));
+            }
+        } catch (e) {
+            alert('Error: ' + e.message);
+        }
+    };
+
+    window.pauseListing = async function(id) {
+        try {
+            var res = await fetch(API + '/listings/' + id + '/pause', { method: 'POST', headers: headers() });
+            if (res.ok) { loadListings(); } else { alert('Error'); }
+        } catch (e) { alert('Error: ' + e.message); }
+    };
+
+    window.activateListing = async function(id) {
+        try {
+            var res = await fetch(API + '/listings/' + id + '/activate', { method: 'POST', headers: headers() });
+            if (res.ok) { loadListings(); } else { alert('Error'); }
+        } catch (e) { alert('Error: ' + e.message); }
+    };
+
+    window.deleteListing = async function(id) {
+        if (!confirm('¿Cerrar esta publicación en MercadoLibre?')) return;
+        try {
+            var res = await fetch(API + '/listings/' + id, { method: 'DELETE', headers: headers() });
+            if (res.ok) { loadListings(); } else { alert('Error'); }
+        } catch (e) { alert('Error: ' + e.message); }
+    };
+
+    // ─── Orders ────────────────────────────────────────────────────────────
+
+    var ordersData = [];
+
+    window.loadOrders = async function() {
+        var tbody = document.getElementById('ordersTableBody');
+        tbody.innerHTML = '<tr><td colspan="6">Cargando...</td></tr>';
+        try {
+            var res = await fetch(API + '/orders?page=1&per_page=50', { headers: headers() });
+            if (!res.ok) throw new Error('Failed to load orders');
+            var data = await res.json();
+            ordersData = data.items || [];
+            renderOrders();
+        } catch (e) {
+            tbody.innerHTML = '<tr><td colspan="6" style="color:var(--color-danger)">Error cargando órdenes</td></tr>';
+        }
+    };
+
+    function renderOrders() {
+        var tbody = document.getElementById('ordersTableBody');
+        var statusFilter = document.getElementById('orderStatusFilter').value;
+        var search = document.getElementById('orderSearch').value.toLowerCase();
+
+        var filtered = ordersData.filter(function(o) {
+            if (statusFilter && o.status !== statusFilter) return false;
+            if (search && !((o.buyer_name || '').toLowerCase().includes(search) || (o.external_order_id || '').includes(search))) return false;
+            return true;
+        });
+
+        if (!filtered.length) {
+            tbody.innerHTML = '<tr><td colspan="6" style="color:var(--color-text-muted)">No hay órdenes.</td></tr>';
+            return;
+        }
+
+        tbody.innerHTML = filtered.map(function(o) {
+            var statusClass = 'meli-status--' + (o.status || 'pending');
+            return '<tr>'
+                + '<td><a href="#" onclick="showOrderDetail(' + o.id + ');return false;">' + escapeHtml(o.external_order_id) + '</a></td>'
+                + '<td>' + escapeHtml(o.buyer_name || o.buyer_nickname || '—') + '</td>'
+                + '<td style="text-align:right">$' + (o.total_amount || 0).toFixed(2) + '</td>'
+                + '<td><span class="meli-status ' + statusClass + '">' + (o.status || '—') + '</span></td>'
+                + '<td>' + (o.created_at ? o.created_at.split('T')[0] : '—') + '</td>'
+                + '<td>'
+                +   (o.status === 'pending' ? '<button class="btn btn--primary btn--xs" onclick="convertOrder(' + o.id + ')">Convertir a Venta</button> ' : '')
+                +   '<button class="btn btn--ghost btn--xs" onclick="showOrderDetail(' + o.id + ')">Ver</button>'
+                + '</td>'
+                + '</tr>';
+        }).join('');
+    }
+
+    window.filterOrders = renderOrders;
+
+    window.showOrderDetail = async function(id) {
+        var modal = document.getElementById('orderModal');
+        var body = document.getElementById('orderModalBody');
+        var footer = document.getElementById('orderModalFooter');
+        body.innerHTML = 'Cargando...';
+        footer.innerHTML = '';
+        modal.classList.add('is-open');
+
+        try {
+            var res = await fetch(API + '/orders/' + id, { headers: headers() });
+            var o = await res.json();
+            if (!res.ok) throw new Error(o.error || 'Error');
+
+            var itemsHtml = (o.items || []).map(function(it) {
+                return '<tr><td>' + escapeHtml(it.title || '—') + '</td><td>' + it.quantity + '</td><td style="text-align:right">$' + (it.unit_price || 0).toFixed(2) + '</td></tr>';
+            }).join('');
+
+            body.innerHTML = '<div style="margin-bottom:var(--space-4);">'
+                + '<p><strong>Comprador:</strong> ' + escapeHtml(o.buyer_name || '—') + ' (' + escapeHtml(o.buyer_nickname || '—') + ')</p>'
+                + '<p><strong>Email:</strong> ' + escapeHtml(o.buyer_email || '—') + '</p>'
+                + '<p><strong>Teléfono:</strong> ' + escapeHtml(o.buyer_phone || '—') + '</p>'
+                + '<p><strong>Total:</strong> $' + (o.total_amount || 0).toFixed(2) + '</p>'
+                + '<p><strong>Estado ML:</strong> ' + escapeHtml(o.external_status || '—') + '</p>'
+                + '<p><strong>Estado Nexus:</strong> ' + escapeHtml(o.status || '—') + '</p>'
+                + '</div>'
+                + '<h4 style="margin:var(--space-3) 0;">Items</h4>'
+                + '<table class="data-table"><thead><tr><th>Producto</th><th>Cantidad</th><th style="text-align:right">Precio</th></tr></thead><tbody>' + itemsHtml + '</tbody></table>';
+
+            footer.innerHTML = '';
+            if (o.status === 'pending') {
+                footer.innerHTML += '<button class="btn btn--primary" onclick="convertOrder(' + o.id + ');closeModal(\'orderModal\')">Convertir a Venta</button> ';
+            }
+            if (o.status === 'confirmed') {
+                footer.innerHTML += '<button class="btn btn--primary" onclick="updateOrderStatus(' + o.id + ', \'packed\')">Marcar Empacada</button> ';
+            }
+            if (o.status === 'packed') {
+                footer.innerHTML += '<button class="btn btn--primary" onclick="updateOrderStatus(' + o.id + ', \'shipped\')">Marcar Enviada</button> ';
+            }
+            footer.innerHTML += '<button class="btn btn--ghost" onclick="closeModal(\'orderModal\')">Cerrar</button>';
+        } catch (e) {
+            body.innerHTML = '<p style="color:var(--color-danger)">Error: ' + escapeHtml(e.message) + '</p>';
+        }
+    };
+
+    window.convertOrder = async function(id) {
+        try {
+            var res = await fetch(API + '/orders/' + id + '/convert', {
+                method: 'POST',
+                headers: headers(),
+                body: JSON.stringify({})
+            });
+            var data = await res.json();
+            if (res.ok) {
+                alert('Orden convertida a venta #' + data.sale_id);
+                loadOrders();
+            } else {
+                alert('Error: ' + (data.error || 'Unknown'));
+            }
+        } catch (e) {
+            alert('Error: ' + e.message);
+        }
+    };
+
+    window.updateOrderStatus = async function(id, status) {
+        try {
+            var res = await fetch(API + '/orders/' + id + '/status', {
+                method: 'POST',
+                headers: headers(),
+                body: JSON.stringify({ status: status })
+            });
+            if (res.ok) { loadOrders(); } else { alert('Error'); }
+        } catch (e) { alert('Error: ' + e.message); }
+    };
+
+    // ─── Utils ─────────────────────────────────────────────────────────────
+
+    function escapeHtml(text) {
+        if (!text) return '';
+        var div = document.createElement('div');
+        div.textContent = text;
+        return div.innerHTML;
+    }
+
+    // ─── Init ──────────────────────────────────────────────────────────────
+
+    // Handle OAuth callback
+    var urlParams = new URLSearchParams(window.location.search);
+    var authCode = urlParams.get('code');
+    if (authCode && window.location.pathname.includes('marketplace-external')) {
+        (async function() {
+            var clientId = localStorage.getItem('meli_client_id');
+            var clientSecret = localStorage.getItem('meli_client_secret');
+            var redirectUri = window.location.origin + '/pos/marketplace-external/callback';
+            try {
+                var res = await fetch(API + '/connect', {
+                    method: 'POST',
+                    headers: headers(),
+                    body: JSON.stringify({
+                        code: authCode,
+                        client_id: clientId,
+                        client_secret: clientSecret,
+                        redirect_uri: redirectUri,
+                    })
+                });
+                var data = await res.json();
+                if (res.ok) {
+                    alert('¡Conectado exitosamente con MercadoLibre!');
+                    window.history.replaceState({}, document.title, '/pos/marketplace-external');
+                    loadConfig();
+                } else {
+                    alert('Error conectando: ' + (data.error || 'Unknown'));
+                }
+            } catch (e) {
+                alert('Error: ' + e.message);
+            }
+        })();
+    }
+
+    document.addEventListener('DOMContentLoaded', function() {
+        loadConfig();
+    });
+})();
diff --git a/pos/static/js/pos.js b/pos/static/js/pos.js
index 3caff55..6b78488 100644
--- a/pos/static/js/pos.js
+++ b/pos/static/js/pos.js
@@ -123,6 +123,8 @@ const POS = (() => {
                 currentRegister = null;
                 document.getElementById('registerInfo').innerHTML =
                     '<span style="color:var(--color-error);cursor:pointer;" onclick="POS.showOpenRegisterModal()" title="Clic para abrir caja">&#x26A0; Sin caja abierta — Clic para abrir</span>';
+                // Force open register modal on first load
+                showOpenRegisterModal();
             }
         } catch (e) {
             console.warn('Register check failed:', e);
@@ -253,6 +255,9 @@ const POS = (() => {
             discount_pct: parseFloat(item.discount_pct || 0),
             tax_rate: parseFloat(item.tax_rate || 0.16),
             stock: item.stock || 0,
+            price_1: parseFloat(item.price_1 || 0),
+            price_2: parseFloat(item.price_2 || 0),
+            price_3: parseFloat(item.price_3 || 0),
         });
 
         renderCart();
@@ -265,6 +270,67 @@ const POS = (() => {
         renderCart();
     }
 
+    function clearCart() {
+        cart.length = 0;
+        selectedRow = -1;
+        renderCart();
+    }
+
+    function openCancelModal() {
+        const overlay = document.getElementById('overlay-cancelar-venta');
+        const dialog = document.getElementById('modal-cancelar-venta');
+        if (overlay) overlay.classList.add('active');
+        if (dialog) dialog.classList.add('active');
+    }
+
+    function closeCancelModal() {
+        const overlay = document.getElementById('overlay-cancelar-venta');
+        const dialog = document.getElementById('modal-cancelar-venta');
+        if (overlay) overlay.classList.remove('active');
+        if (dialog) dialog.classList.remove('active');
+    }
+
+    function changeQuantity() {
+        if (selectedRow < 0 || selectedRow >= cart.length) {
+            showToast('Selecciona un articulo primero', 'warn');
+            return;
+        }
+        const q = prompt('Nueva cantidad:', cart[selectedRow].quantity);
+        if (q !== null) {
+            const n = parseInt(q);
+            if (n > 0) {
+                cart[selectedRow].quantity = n;
+                renderCart();
+            }
+        }
+    }
+
+    function applyDiscount() {
+        if (selectedRow < 0 || selectedRow >= cart.length) {
+            showToast('Selecciona un articulo primero', 'warn');
+            return;
+        }
+        const d = prompt('Descuento %:', cart[selectedRow].discount_pct);
+        if (d !== null) {
+            const n = parseFloat(d);
+            if (n >= 0 && n <= 100) {
+                cart[selectedRow].discount_pct = n;
+                renderCart();
+            }
+        }
+    }
+
+    // Wire confirm-cancel button
+    document.addEventListener('DOMContentLoaded', function() {
+        var btn = document.getElementById('btnConfirmCancel');
+        if (btn) {
+            btn.addEventListener('click', function() {
+                clearCart();
+                closeCancelModal();
+            });
+        }
+    });
+
     function renderCart() {
         const tbody = document.getElementById('cartBody');
         const table = document.getElementById('cartTable');
@@ -472,6 +538,9 @@ const POS = (() => {
             cost: item.cost,
             tax_rate: item.tax_rate,
             stock: item.stock,
+            price_1: item.price_1,
+            price_2: item.price_2,
+            price_3: item.price_3,
         });
         hideSearchResults();
         document.getElementById('itemSearch').value = '';
@@ -530,11 +599,22 @@ const POS = (() => {
         }
     }
 
+    function recalcCartPrices() {
+        const tier = currentCustomer ? (currentCustomer.price_tier || 1) : 1;
+        cart.forEach(item => {
+            if (item.price_1 > 0) {
+                item.unit_price = tier === 3 ? item.price_3 : tier === 2 ? item.price_2 : item.price_1;
+            }
+        });
+    }
+
     async function selectCustomer(customer) {
         currentCustomer = customer;
         document.getElementById('customerAutocomplete').style.display = 'none';
         document.getElementById('customerSearchWrap').querySelector('input').style.display = 'none';
 
+        recalcCartPrices();
+
         const tiers = { 1: 'P1 Mostrador', 2: 'P2 Taller', 3: 'P3 Mayoreo' };
         document.getElementById('customerName').textContent = customer.name;
         document.getElementById('customerTier').textContent = tiers[customer.price_tier] || 'P1';
@@ -1255,7 +1335,7 @@ const POS = (() => {
     init();
 
     return {
-        addToCart, removeFromCart, selectRow,
+        addToCart, removeFromCart, clearCart, selectRow,
         updateQty, updateDiscount,
         addFromSearch, hideSearchResults,
         selectCustomer, clearCustomer,
@@ -1268,5 +1348,6 @@ const POS = (() => {
         connectThermal, thermalPrint,
         showOpenRegisterModal, closeOpenRegisterModal, openRegister,
         showCutZModal, closeCutZModal, loadCutX, confirmCutZ,
+        openCancelModal, closeCancelModal, changeQuantity, applyDiscount,
     };
 })();
diff --git a/pos/static/js/pos.min.js b/pos/static/js/pos.min.js
index 9fa3744..36242df 100644
--- a/pos/static/js/pos.min.js
+++ b/pos/static/js/pos.min.js
@@ -1 +1 @@
-const POS=(()=>{let e=localStorage.getItem("pos_token")||"",t=[],n=-1,o=null,a=null,i="efectivo",r=!1,c=100,s=null,l=null,d=null,m=null;const u=localStorage.getItem("pos_currency")||"MXN",p={MXN:"$",USD:"US$"},y="USD"===u?"en-US":"es-MX",v=e=>(p[u]||"$")+parseFloat(e||0).toLocaleString(y,{minimumFractionDigits:2,maximumFractionDigits:2});async function g(t,n={}){n.headers={"Content-Type":"application/json",Authorization:"Bearer "+e};const o=await fetch(t,n),a=await o.json();if(!o.ok)throw new Error(a.error||`HTTP ${o.status}`);return a}function f(e){const t=document.getElementById("toastContainer");if(!t)return;const n=document.createElement("div");n.className="toast",n.textContent=e,t.appendChild(n),setTimeout((()=>n.remove()),2100)}function h(e){const n=t.find((t=>t.inventory_id===e.inventory_id));if(n)return n.quantity+=e.quantity||1,void E();t.push({inventory_id:e.inventory_id||e.id,part_number:e.part_number||"",name:e.name||"",quantity:e.quantity||1,unit_price:parseFloat(e.unit_price||e.price_1||0),unit_cost:parseFloat(e.cost||0),discount_pct:parseFloat(e.discount_pct||0),tax_rate:parseFloat(e.tax_rate||.16),stock:e.stock||0}),E(),f(`${e.name||"Articulo"} agregado`)}function _(e){t.splice(e,1),n>=t.length&&(n=t.length-1),E()}function E(){const e=document.getElementById("cartBody"),o=document.getElementById("cartTable"),a=document.getElementById("cartEmpty");if(0===t.length)return o.style.display="none",a.style.display="flex",void b();o.style.display="",a.style.display="none";let i="";t.forEach(((e,t)=>{const o=e.unit_price*e.quantity,a=o-o*e.discount_pct/100,c=r?`<td class="num" style="text-align:right;padding:var(--space-2);font-family:var(--font-mono);color:var(--color-text-muted);font-size:var(--text-caption);">${v(e.unit_cost)}</td>`:"";let s="";if(r){const t=e.unit_price*(1-e.discount_pct/100),n=t>0?((t-e.unit_cost)/t*100).toFixed(1):"0.0",o=parseFloat(n);s=`<td style="text-align:center;padding:var(--space-2);"><span style="font-family:var(--font-mono);font-size:var(--text-caption);font-weight:var(--font-weight-bold);color:${o>30?"var(--color-success)":o>15?"var(--color-warning)":"var(--color-error)"};">${n}%</span></td>`}i+=`<tr style="border-bottom:1px solid var(--color-border);cursor:pointer;${t===n?"background:var(--color-primary-muted);":""}" onclick="POS.selectRow(${t})">\n                <td style="padding:var(--space-2);color:var(--color-text-muted);">${t+1}</td>\n                <td style="padding:var(--space-2);">\n                    <div style="font-weight:var(--font-weight-semibold);color:var(--color-text-primary);">${e.name}</div>\n                    <div style="font-family:var(--font-mono);font-size:var(--text-caption);color:var(--color-text-muted);">${e.part_number} | Stock: ${e.stock}</div>\n                </td>\n                <td style="text-align:center;padding:var(--space-2);"><input type="number" style="width:50px;text-align:center;font-family:var(--font-mono);background:var(--color-bg-base);color:var(--color-text-primary);border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:2px 4px;" value="${e.quantity}" min="1"\n                    onchange="POS.updateQty(${t}, this.value)" onclick="event.stopPropagation()"></td>\n                <td style="text-align:right;padding:var(--space-2);font-family:var(--font-mono);">${v(e.unit_price)}</td>\n                <td style="text-align:center;padding:var(--space-2);"><input type="number" style="width:45px;text-align:center;font-family:var(--font-mono);background:var(--color-bg-base);color:var(--color-text-primary);border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:2px 4px;" value="${e.discount_pct}" min="0" max="100" step="0.5"\n                    onchange="POS.updateDiscount(${t}, this.value)" onclick="event.stopPropagation()">%</td>\n                <td style="text-align:right;padding:var(--space-2);font-family:var(--font-mono);font-weight:var(--font-weight-bold);">${v(a)}</td>\n                ${c}\n                ${s}\n                <td style="text-align:center;"><button style="background:transparent;border:1px solid var(--color-border);border-radius:var(--radius-sm);width:24px;height:24px;cursor:pointer;color:var(--color-text-muted);font-size:14px;" onclick="event.stopPropagation(); POS.removeFromCart(${t})">&times;</button></td>\n            </tr>`})),e.innerHTML=i,b(),function(){const e=document.getElementById("avgMargin");if(!e||!r)return;let n=0,o=0;if(t.forEach((e=>{if(e.unit_cost>0){const t=e.unit_price*(1-e.discount_pct/100);n+=t*e.quantity,o+=e.unit_cost*e.quantity}})),n>0){const t=(n-o)/n*100;e.textContent=t.toFixed(1)+"%",e.style.color=t>30?"var(--color-success)":t>15?"var(--color-warning)":"var(--color-error)"}else e.textContent="--"}()}function I(e,n){let o=Math.max(0,Math.min(100,parseFloat(n)||0));o>c&&(alert(`Descuento maximo permitido: ${c}%`),o=c),t[e].discount_pct=o,E()}function b(){let e=0,n=0,o=0;t.forEach((t=>{const a=t.unit_price*t.quantity,i=a*t.discount_pct/100,r=a-i,c=r*t.tax_rate;e+=r,n+=i,o+=c}));const a=e+o;document.getElementById("dispSubtotal").textContent=v(e),document.getElementById("dispTax").textContent=v(o),document.getElementById("dispTotal").textContent=v(a),n>0?(document.getElementById("discountRow").style.display="",document.getElementById("dispDiscount").textContent="-"+v(n)):document.getElementById("discountRow").style.display="none"}function x(){let e=0,n=0;return t.forEach((t=>{const o=t.unit_price*t.quantity,a=o-o*t.discount_pct/100,i=a*t.tax_rate;e+=a,n+=i})),Math.round(100*(e+n))/100}async function B(e){if(!e||e.length<2)$();else try{const t=await g(`/pos/api/inventory/items?q=${encodeURIComponent(e)}&per_page=20`),n=document.getElementById("searchResults"),a=document.getElementById("totalsPanel");if(0===t.data.length)n.innerHTML='<div style="padding:20px;text-align:center;color:var(--color-text-muted);">Sin resultados</div>';else{let e="";t.data.forEach((t=>{let n=t.price_1;if(o){const e=o.price_tier||1;n=3===e?t.price_3:2===e?t.price_2:t.price_1}e+=`<div style="padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--color-border);cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:var(--transition-fast);" onmouseover="this.style.background='var(--color-primary-muted)'" onmouseout="this.style.background=''" onclick='POS.addFromSearch(${JSON.stringify(t).replace(/'/g,"&#39;")}, ${n})'>\n                        <div>\n                            <div style="font-weight:var(--font-weight-semibold);">${t.name}</div>\n                            <div style="font-family:var(--font-mono);font-size:var(--text-caption);color:var(--color-text-muted);">${t.part_number} | ${t.brand||""}</div>\n                            <div style="font-size:var(--text-caption);color:${t.stock<=0?"var(--color-error)":"var(--color-text-muted)"};">Stock: ${t.stock}</div>\n                        </div>\n                        <div style="font-family:var(--font-mono);font-weight:var(--font-weight-bold);color:var(--color-primary);">${v(n)}</div>\n                    </div>`})),n.innerHTML=e}n.style.display="",a.style.display="none"}catch(e){console.error("Search error:",e)}}function $(){const e=document.getElementById("searchResults"),t=document.getElementById("totalsPanel");e&&(e.style.display="none"),t&&(t.style.display="")}async function C(e){o=e,document.getElementById("customerAutocomplete").style.display="none",document.getElementById("customerSearchWrap").querySelector("input").style.display="none";if(document.getElementById("customerName").textContent=e.name,document.getElementById("customerTier").textContent={1:"P1 Mostrador",2:"P2 Taller",3:"P3 Mayoreo"}[e.price_tier]||"P1",document.getElementById("customerCredit").textContent=`Credito: ${v(e.credit_balance)} / ${v(e.credit_limit)}`,document.getElementById("customerSelected").style.display="",e.vehicle_info&&e.vehicle_info.length>0){const t=e.vehicle_info[0];document.getElementById("vehicleInfo").textContent=`${t.make||""} ${t.model||""} ${t.year||""} ${t.plates?"("+t.plates+")":""}`,document.getElementById("vehicleBanner").classList.add("visible")}try{const t=await g(`/pos/api/customers/${e.id}`);if(t.recent_purchases&&t.recent_purchases.length>0){const e=t.recent_purchases[0],n=Math.floor((Date.now()-new Date(e.created_at).getTime())/864e5),o=0===n?"hoy":1===n?"hace 1 dia":`hace ${n} dias`;document.getElementById("lastPurchaseInfo").textContent=`${v(e.total)} ${o}`,document.getElementById("vehicleBanner").classList.add("visible")}}catch(e){console.warn("Could not fetch customer detail:",e)}const t=document.getElementById("cfdiHint");t&&e.rfc&&(t.textContent=`RFC: ${e.rfc}`,document.getElementById("cfdiCheck").checked=!!e.rfc),E()}function w(){o=null,document.getElementById("customerSelected").style.display="none";const e=document.getElementById("customerSearch");e&&(e.style.display="",e.value=""),document.getElementById("vehicleBanner").classList.remove("visible");const t=document.getElementById("cfdiHint");t&&(t.textContent=""),E()}function k(){document.getElementById("newCustomerModal").classList.remove("open")}function S(){if(0===t.length)return void f("Carrito vacio");if(!a)return void alert("No hay caja abierta. Abra una caja primero.");i="efectivo";const e=x();document.getElementById("modalTotal").textContent=v(e),document.getElementById("modalItemCount").textContent=`${t.reduce(((e,t)=>e+t.quantity),0)} productos`,document.getElementById("modalCustomerName").textContent=o?o.name:"Publico General",document.getElementById("cashReceived").value="",document.getElementById("changeDisplay").textContent="$0.00",document.getElementById("changeDisplay").className="cambio-amount positive";const n=document.getElementById("paymentRef");n&&(n.value="");const r=document.getElementById("quickAmounts");if(r){const t=[Math.ceil(e),100*Math.ceil(e/100),500*Math.ceil(e/500),1e3*Math.ceil(e/1e3)],n=[...new Set(t)].slice(0,4);r.innerHTML=n.map((e=>`<button class="quick-btn" onclick="document.getElementById('cashReceived').value=${e};POS.updateChange();">${v(e)}</button>`)).join("")}const c=document.getElementById("refAmount");c&&(c.value=v(e)),document.querySelectorAll(".pago-tab").forEach((e=>e.classList.remove("active"))),document.querySelector('.pago-tab[data-method="efectivo"]').classList.add("active"),document.getElementById("cashPayment").classList.add("active"),document.getElementById("cashPayment").style.display="",document.getElementById("refPayment").classList.remove("active"),document.getElementById("refPayment").style.display="none",document.getElementById("mixedPayment").classList.remove("active"),document.getElementById("mixedPayment").style.display="none";const s=document.getElementById("btnConfirmPayment");s.disabled=!1,s.textContent=`Confirmar Pago — ${v(e)}`,document.getElementById("paymentModal").classList.add("open"),setTimeout((()=>document.getElementById("cashReceived").focus()),100)}function P(){document.getElementById("paymentModal").classList.remove("open")}async function T(){const e=x();let r=0,c=[],d="";if("efectivo"===i){if(r=parseFloat(document.getElementById("cashReceived").value)||0,r<e)return void alert(`Monto insuficiente. Total: ${v(e)}`)}else if("transferencia"===i||"tarjeta"===i)r=e,d=document.getElementById("paymentRef").value.trim();else if("mixto"===i){if(document.querySelectorAll(".mixed-row").forEach((e=>{const t=e.querySelector("select").value,n=parseFloat(e.querySelector(".mixed-amount").value)||0,o=e.querySelectorAll("input")[1]?.value||"";n>0&&(c.push({method:t,amount:n,reference:o}),r+=n)})),r<e)return void alert(`Monto total insuficiente. Falta: ${v(e-r)}`)}const m={items:t.map((e=>({inventory_id:e.inventory_id,quantity:e.quantity,unit_price:e.unit_price,discount_pct:e.discount_pct,tax_rate:e.tax_rate}))),customer_id:o?o.id:null,payment_method:i,sale_type:"cash",register_id:a?a.id:null,amount_paid:r,payment_details:c,reference:d,generate_cfdi:document.getElementById("cfdiCheck").checked},u=document.getElementById("btnConfirmPayment");u.disabled=!0,u.textContent="Procesando...";try{const e=await g("/pos/api/sales",{method:"POST",body:JSON.stringify(m)});s=e.id,l=e,P(),L(e),t=[],n=-1,w(),E(),f(`Venta #${e.id} completada`)}catch(e){alert("Error al procesar venta: "+e.message)}finally{u.disabled=!1,u.textContent="Confirmar Pago"}}async function M(){if(0===t.length)return void f("Carrito vacio");const e={items:t.map((e=>({inventory_id:e.inventory_id,quantity:e.quantity,unit_price:e.unit_price,discount_pct:e.discount_pct,tax_rate:e.tax_rate}))),customer_id:o?o.id:null};try{const t=await g("/pos/api/quotations",{method:"POST",body:JSON.stringify(e)});f(`Cotizacion #${t.id} guardada. Total: ${v(t.total)}`)}catch(e){alert("Error: "+e.message)}}function L(e){const t=new Date(e.created_at).toLocaleString("es-MX",{year:"numeric",month:"short",day:"numeric",hour:"2-digit",minute:"2-digit"}),n=o?o.name:"Publico General",r=o&&o.rfc?o.rfc:"";let c="";(e.items||[]).forEach((e=>{const t=e.unit_price*e.quantity*(1-(e.discount_pct||0)/100);c+=`\n                <div class="item-line-wide">\n                    <span class="qty">${e.quantity}</span>\n                    <span class="name">${e.name||""}</span>\n                    <span class="price">${v(e.unit_price)}</span>\n                    <span class="subtotal">${v(e.subtotal||t)}</span>\n                </div>`}));const s=`\n            <div class="store-name">NEXUS AUTOPARTS</div>\n            <div class="store-tagline">Tu conexion con las refacciones</div>\n            <div class="store-info">\n                Sucursal: ${a&&a.branch_name||""}<br>\n                RFC: NAU210315XX1\n            </div>\n            <hr class="divider-double">\n            <div class="folio-line">\n                <span>VENTA: V-${e.id}</span>\n                <span>${t}</span>\n            </div>\n            <div class="ticket-row" style="font-size: 9px; color: #555; margin-bottom: 4px;">\n                <span>Cliente: ${n}</span>\n                ${r?`<span>RFC: ${r}</span>`:""}\n            </div>\n            <hr class="divider">\n            <div class="item-line-wide" style="font-weight: bold; font-size: 9px; color: #555; text-transform: uppercase;">\n                <span class="qty">Cant</span>\n                <span class="name">Descripcion</span>\n                <span class="price">P. Unit</span>\n                <span class="subtotal">Importe</span>\n            </div>\n            <hr class="divider" style="margin: 2px 0;">\n            ${c}\n            <hr class="divider-double">\n            <div class="total-section">\n                <div class="total-line">\n                    <span>Subtotal:</span><span>${v(e.subtotal)}</span>\n                </div>\n                ${e.discount_total>0?`<div class="total-line"><span>Descuento:</span><span>-${v(e.discount_total)}</span></div>`:""}\n                <div class="total-line">\n                    <span>IVA 16%:</span><span>${v(e.tax_total)}</span>\n                </div>\n                <div class="total-line grand">\n                    <span>TOTAL:</span><span>${v(e.total)}</span>\n                </div>\n            </div>\n            <hr class="divider">\n            <div class="payment-section">\n                <div class="ticket-row">\n                    <span>Forma de pago:</span><span>${e.payment_method||i}</span>\n                </div>\n                ${"efectivo"===e.payment_method?`\n                <div class="ticket-row">\n                    <span>Recibido:</span><span>${v(e.amount_paid)}</span>\n                </div>\n                <div class="ticket-row" style="font-weight: bold;">\n                    <span>Cambio:</span><span>${v(e.change_given||0)}</span>\n                </div>`:""}\n            </div>\n            <hr class="divider">\n            <div class="footer-section">\n                <div class="thanks">Gracias por su compra!</div>\n                <div>Conserve su ticket como comprobante.</div>\n            </div>\n        `,l=document.getElementById("ticketContent");l&&(l.innerHTML=s);const d=document.getElementById("ticketPreviewContent");d&&(d.innerHTML=s),document.getElementById("ticketModal").classList.add("open")}function q(){document.getElementById("ticketModal").classList.remove("open")}async function N(){if(s)try{L(await g(`/pos/api/sales/${s}`))}catch(e){alert("Error: "+e.message)}else f("No hay venta reciente")}function D(){f("Comando enviado al cajon de efectivo.")}return async function(){try{const t=JSON.parse(atob(e.split(".")[1]));if(document.getElementById("employeeName").textContent=t.name||"Empleado",document.getElementById("branchName").textContent=t.branch_name||"",r=(t.permissions||[]).includes("pos.view_cost"),c=t.max_discount_pct||100,r){document.getElementById("thCost").style.display="",document.getElementById("thMargin").style.display="";const e=document.getElementById("costToggle");e&&(e.style.display="")}const n=document.querySelector(".status-bar__user-avatar");if(n&&t.name){const e=t.name.split(" ");n.textContent=e.map((e=>e[0])).join("").substring(0,2).toUpperCase()}}catch(e){console.warn("Could not parse token:",e)}const o=localStorage.getItem("pos_cart");if(o)try{const e=JSON.parse(o);for(const t of e)h(t);localStorage.removeItem("pos_cart")}catch(e){console.warn("Could not load catalog cart:",e)}await async function(){try{const e=await g("/pos/api/register/current");e.register?(a=e.register,document.getElementById("registerInfo").innerHTML=`<span>Caja #${e.register.register_number}</span>`):document.getElementById("registerInfo").innerHTML="<span>Sin caja abierta</span>"}catch(e){console.warn("Register check failed:",e)}}(),document.addEventListener("keydown",(e=>{const o=e.target.tagName,a="INPUT"===o||"TEXTAREA"===o||"SELECT"===o;switch(e.key){case"F1":e.preventDefault(),document.getElementById("itemSearch").focus();break;case"F2":e.preventDefault(),document.getElementById("customerSearch").focus(),document.getElementById("customerSearch").style.display="",document.getElementById("customerSelected").style.display="none";break;case"F3":e.preventDefault(),S();break;case"F4":e.preventDefault(),M();break;case"F5":e.preventDefault(),N();break;case"F6":e.preventDefault(),D();break;case"Escape":if(e.preventDefault(),document.getElementById("paymentModal").classList.contains("open"))P();else if(document.getElementById("newCustomerModal").classList.contains("open"))k();else if(document.getElementById("ticketModal").classList.contains("open"))q();else if(document.querySelector(".confirm-overlay.active")){const e=document.getElementById("overlay-cancelar-venta"),t=document.getElementById("modal-cancelar-venta");e&&e.classList.contains("active")&&(e.classList.remove("active"),t.classList.remove("active"))}else $();break;case"Delete":!a&&n>=0&&n<t.length&&(e.preventDefault(),_(n));break;case"+":!a&&n>=0&&n<t.length&&(e.preventDefault(),t[n].quantity++,E());break;case"-":!a&&n>=0&&n<t.length&&(e.preventDefault(),t[n].quantity>1&&(t[n].quantity--,E()));break;case"*":if(!a&&n>=0&&n<t.length){e.preventDefault();const o=prompt("Descuento %:",t[n].discount_pct);null!==o&&I(n,o)}break;case"ArrowUp":!a&&t.length>0&&(e.preventDefault(),n=Math.max(0,n-1),E());break;case"ArrowDown":!a&&t.length>0&&(e.preventDefault(),n=Math.min(t.length-1,n+1),E());break;case"Enter":"cashReceived"===e.target.id&&(e.preventDefault(),T())}})),function(){const e=document.getElementById("itemSearch");if(!e)return;e.addEventListener("input",(()=>{clearTimeout(d),d=setTimeout((()=>B(e.value.trim())),300)})),e.addEventListener("keydown",(t=>{"Enter"===t.key&&(t.preventDefault(),B(e.value.trim())),"Escape"===t.key&&(e.value="",$())}))}(),function(){const e=document.getElementById("customerSearch");if(!e)return;e.addEventListener("input",(()=>{clearTimeout(m),m=setTimeout((()=>async function(e){if(!e||e.length<2)return void(document.getElementById("customerAutocomplete").style.display="none");try{const t=await g(`/pos/api/customers?q=${encodeURIComponent(e)}&per_page=10`),n=document.getElementById("customerAutocomplete");if(0===t.data.length)n.innerHTML='<div style="padding:var(--space-3);color:var(--color-text-muted);">Sin resultados</div>';else{let e="";t.data.forEach((t=>{const n={1:"Mostrador",2:"Taller",3:"Mayoreo"};e+=`<div style="padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--color-border);cursor:pointer;transition:var(--transition-fast);" onmouseover="this.style.background='var(--color-primary-muted)'" onmouseout="this.style.background=''" onclick='POS.selectCustomer(${JSON.stringify(t).replace(/'/g,"&#39;")})'>\n                        <div style="font-weight:var(--font-weight-semibold);">${t.name}</div>\n                        <div style="font-size:var(--text-caption);color:var(--color-text-muted);">${t.rfc||""} | ${t.phone||""} | ${n[t.price_tier]||"P1"} | Credito: ${v(t.credit_balance)}/${v(t.credit_limit)}</div>\n                    </div>`})),n.innerHTML=e}n.style.display="block"}catch(e){console.error("Customer search error:",e)}}(e.value.trim())),300)})),e.addEventListener("keydown",(t=>{"Escape"===t.key&&(e.value="",document.getElementById("customerAutocomplete").style.display="none")}))}()}(),{addToCart:h,removeFromCart:_,selectRow:function(e){n=e,E()},updateQty:function(e,n){const o=Math.max(1,parseInt(n)||1);t[e].quantity=o,E()},updateDiscount:I,addFromSearch:function(e,t){h({inventory_id:e.id,part_number:e.part_number,name:e.name,unit_price:t,cost:e.cost,tax_rate:e.tax_rate,stock:e.stock}),$(),document.getElementById("itemSearch").value="",document.getElementById("itemSearch").focus()},hideSearchResults:$,selectCustomer:C,clearCustomer:w,showNewCustomerModal:function(){document.getElementById("newCustomerModal").classList.add("open"),setTimeout((()=>document.getElementById("ncName").focus()),100)},closeNewCustomerModal:k,saveNewCustomer:async function(){const e=document.getElementById("ncName").value.trim();if(!e)return void alert("Nombre es requerido");const t=[],n=document.getElementById("ncVehMake").value.trim();n&&t.push({make:n,model:document.getElementById("ncVehModel").value.trim(),year:document.getElementById("ncVehYear").value.trim(),plates:document.getElementById("ncVehPlates").value.trim()});const o={name:e,rfc:document.getElementById("ncRfc").value.trim()||null,razon_social:document.getElementById("ncRazonSocial").value.trim()||null,regimen_fiscal:document.getElementById("ncRegimenFiscal").value||null,uso_cfdi:document.getElementById("ncUsoCfdi").value||"G03",phone:document.getElementById("ncPhone").value.trim()||null,email:document.getElementById("ncEmail").value.trim()||null,price_tier:parseInt(document.getElementById("ncPriceTier").value)||1,credit_limit:parseFloat(document.getElementById("ncCreditLimit").value)||0,vehicle_info:t.length>0?t:null};try{C({id:(await g("/pos/api/customers",{method:"POST",body:JSON.stringify(o)})).id,name:o.name,rfc:o.rfc,phone:o.phone,price_tier:o.price_tier,credit_limit:o.credit_limit,credit_balance:0,vehicle_info:o.vehicle_info}),k(),f("Cliente creado")}catch(e){alert("Error al crear cliente: "+e.message)}},checkout:S,confirmPayment:T,closePaymentModal:P,selectPaymentMethod:function(e,t){i=e,document.querySelectorAll(".pago-tab").forEach((e=>e.classList.remove("active"))),t&&t.classList.add("active");const n={efectivo:"cashPayment",transferencia:"refPayment",tarjeta:"refPayment",mixto:"mixedPayment"};if(["cashPayment","refPayment","mixedPayment"].forEach((t=>{const o=document.getElementById(t);if(o){const t=o.id===n[e];o.classList.toggle("active",t),o.style.display=t?"":"none"}})),"efectivo"===e&&document.getElementById("cashReceived").focus(),"transferencia"===e||"tarjeta"===e){const e=document.getElementById("paymentRef");e&&e.focus()}},updateChange:function(){const e=x(),t=(parseFloat(document.getElementById("cashReceived").value)||0)-e,n=document.getElementById("changeDisplay");t>=0?(n.textContent=v(t),n.className="cambio-amount positive"):(n.textContent="-"+v(Math.abs(t)),n.className="cambio-amount negative")},updateMixedTotal:function(){const e=x();let t=0;document.querySelectorAll(".mixed-amount").forEach((e=>{t+=parseFloat(e.value)||0}));const n=e-t,o=document.getElementById("mixedRemaining");o.textContent=n>0?`Faltante: ${v(n)}`:`Cubierto (${v(t)})`,o.style.color=n>0?"var(--color-error)":"var(--color-success)"},creditSale:async function(){if(0===t.length)return void alert("Carrito vacio");if(!o)return void alert("Seleccione un cliente para venta a credito");if(!a)return void alert("No hay caja abierta.");const e=x(),i=(o.credit_limit||0)-(o.credit_balance||0);if(o.credit_limit>0&&e>i&&!confirm(`Credito insuficiente. Disponible: ${v(i)}, Total: ${v(e)}. Continuar?`))return;const r={items:t.map((e=>({inventory_id:e.inventory_id,quantity:e.quantity,unit_price:e.unit_price,discount_pct:e.discount_pct,tax_rate:e.tax_rate}))),customer_id:o.id,payment_method:"credito",sale_type:"credit",register_id:a?a.id:null,amount_paid:0};try{const e=await g("/pos/api/sales",{method:"POST",body:JSON.stringify(r)});s=e.id,l=e,L(e),t=[],n=-1,w(),E()}catch(e){alert("Error: "+e.message)}},saveQuotation:M,createLayaway:async function(){if(0===t.length)return void alert("Carrito vacio");if(!o)return void alert("Seleccione un cliente para apartado");const e=x(),i=prompt(`Total: ${v(e)}\nIngrese monto del anticipo:`);if(!i)return;const r=parseFloat(i);if(isNaN(r)||r<=0)return void alert("Monto invalido");if(r>e)return void alert("El anticipo no puede exceder el total");const c={items:t.map((e=>({inventory_id:e.inventory_id,quantity:e.quantity,unit_price:e.unit_price,discount_pct:e.discount_pct,tax_rate:e.tax_rate}))),customer_id:o.id,initial_payment:r,payment_method:"efectivo",register_id:a?a.id:null};try{const e=await g("/pos/api/layaways",{method:"POST",body:JSON.stringify(c)});f(`Apartado #${e.id} creado. Restante: ${v(e.remaining)}`),t=[],n=-1,w(),E()}catch(e){alert("Error: "+e.message)}},showLastSale:N,openDrawer:D,showTicket:L,closeTicketModal:q,printTicket:function(){const e=document.getElementById("ticketPrintArea");e&&(e.style.display="block"),window.print(),setTimeout((()=>{e&&(e.style.display="none")}),500)},connectThermal:async function(){if(!window.NexusPrinter)return void f("Printer module not loaded");const e=await NexusPrinter.connect();e.ok?(f("Impresora conectada: "+(e.name||e.type)),function(){const e=document.getElementById("btnConnectPrinter"),t=document.getElementById("btnThermalPrint");window.NexusPrinter&&NexusPrinter.isConnected()?(e&&(e.style.display="none"),t&&(t.style.display="")):(e&&(e.style.display=""),t&&(t.style.display="none"))}()):f(e.error||"No se pudo conectar la impresora")},thermalPrint:async function(){if(!window.NexusPrinter||!NexusPrinter.isConnected())return void f("Conecte una impresora termica primero");if(!s)return void f("No hay venta para imprimir");f(await NexusPrinter.printSale(s)?"Ticket enviado a impresora termica":"Error al imprimir. Reconecte la impresora.")}}})();
\ No newline at end of file
+const POS=(()=>{let e=localStorage.getItem("pos_token")||"",t=[],n=-1,o=null,a=null,r="efectivo",i=!1,c=100,s=null,l=null,d=null,m=null;const u=localStorage.getItem("pos_currency")||"MXN",p={MXN:"$",USD:"US$"},y="USD"===u?"en-US":"es-MX",v=e=>(p[u]||"$")+parseFloat(e||0).toLocaleString(y,{minimumFractionDigits:2,maximumFractionDigits:2});async function g(t,n={}){n.headers={"Content-Type":"application/json",Authorization:"Bearer "+e};const o=await fetch(t,n),a=await o.json();if(!o.ok)throw new Error(a.error||`HTTP ${o.status}`);return a}function f(e){const t=document.getElementById("toastContainer");if(!t)return;const n=document.createElement("div");n.className="toast",n.textContent=e,t.appendChild(n),setTimeout((()=>n.remove()),2100)}function h(){document.getElementById("openRegisterModal").classList.add("open"),document.getElementById("registerOpenResult").innerHTML=""}function _(){document.getElementById("openRegisterModal").classList.remove("open"),document.getElementById("registerOpenResult").innerHTML=""}function E(){document.getElementById("cutZModal").classList.remove("open"),document.getElementById("cutZResult").innerHTML=""}async function b(){const e=document.getElementById("cutZSummary");try{const t=await g("/pos/api/register/cut-x");if(t.error)return void(e.innerHTML='<p style="color:var(--color-error);">'+t.error+"</p>");let n='<div style="display:grid;grid-template-columns:1fr 1fr;gap:var(--space-3);font-size:var(--text-body-sm);">';if(n+='<div><span style="color:var(--color-text-muted);">Efectivo inicial</span><br/><strong>'+v(t.opening_amount)+"</strong></div>",n+='<div><span style="color:var(--color-text-muted);">Ventas totales</span><br/><strong>'+v(t.total_sales)+"</strong> ("+t.total_sales_count+")</div>",n+='<div><span style="color:var(--color-text-muted);">Efectivo en ventas</span><br/><strong>'+v(t.cash_from_sales)+"</strong></div>",n+='<div><span style="color:var(--color-text-muted);">Cambio entregado</span><br/><strong>-'+v(t.change_given)+"</strong></div>",n+='<div><span style="color:var(--color-text-muted);">Entradas de efectivo</span><br/><strong>+'+v(t.cash_movements_in)+"</strong></div>",n+='<div><span style="color:var(--color-text-muted);">Salidas de efectivo</span><br/><strong>-'+v(t.cash_movements_out)+"</strong></div>",n+='<div><span style="color:var(--color-text-muted);">Cancelaciones</span><br/><strong>'+t.cancelled_count+" ("+v(t.cancelled_amount)+")</strong></div>",n+='<div><span style="color:var(--color-text-muted);">Efectivo esperado</span><br/><strong style="color:var(--color-accent);font-size:1.1em;">'+v(t.expected_cash)+"</strong></div>",n+="</div>",t.sales_by_method&&Object.keys(t.sales_by_method).length){n+='<div style="margin-top:var(--space-3);padding-top:var(--space-3);border-top:1px solid var(--color-border);">',n+='<span style="color:var(--color-text-muted);font-size:var(--text-caption);">Por metodo de pago:</span><br/>';for(const[e,o]of Object.entries(t.sales_by_method))n+='<span style="font-size:var(--text-body-sm);margin-right:var(--space-3);">'+e+": "+v(o.amount)+" ("+o.count+")</span>";n+="</div>"}t.movement_detail&&t.movement_detail.length&&(n+='<div style="margin-top:var(--space-3);padding-top:var(--space-3);border-top:1px solid var(--color-border);">',n+='<span style="color:var(--color-text-muted);font-size:var(--text-caption);">Movimientos de caja:</span><br/>',t.movement_detail.forEach((function(e){n+='<div style="font-size:var(--text-body-sm);">'+e.type+" "+v(e.amount)+" — "+(e.reason||"")+"</div>"})),n+="</div>"),e.innerHTML=n,document.getElementById("cutZClosingAmount").value=t.expected_cash.toFixed(2)}catch(t){e.innerHTML='<p style="color:var(--color-error);">Error cargando resumen</p>'}}function I(e){const n=t.find((t=>t.inventory_id===e.inventory_id));if(n)return n.quantity+=e.quantity||1,void B();t.push({inventory_id:e.inventory_id||e.id,part_number:e.part_number||"",name:e.name||"",quantity:e.quantity||1,unit_price:parseFloat(e.unit_price||e.price_1||0),unit_cost:parseFloat(e.cost||0),discount_pct:parseFloat(e.discount_pct||0),tax_rate:parseFloat(e.tax_rate||.16),stock:e.stock||0}),B(),f(`${e.name||"Articulo"} agregado`)}function x(e){t.splice(e,1),n>=t.length&&(n=t.length-1),B()}function B(){const e=document.getElementById("cartBody"),o=document.getElementById("cartTable"),a=document.getElementById("cartEmpty");if(0===t.length)return o.style.display="none",a.style.display="flex",void $();o.style.display="",a.style.display="none";let r="";t.forEach(((e,t)=>{const o=e.unit_price*e.quantity,a=o-o*e.discount_pct/100,c=i?`<td class="num" style="text-align:right;padding:var(--space-2);font-family:var(--font-mono);color:var(--color-text-muted);font-size:var(--text-caption);">${v(e.unit_cost)}</td>`:"";let s="";if(i){const t=e.unit_price*(1-e.discount_pct/100),n=t>0?((t-e.unit_cost)/t*100).toFixed(1):"0.0",o=parseFloat(n);s=`<td style="text-align:center;padding:var(--space-2);"><span style="font-family:var(--font-mono);font-size:var(--text-caption);font-weight:var(--font-weight-bold);color:${o>30?"var(--color-success)":o>15?"var(--color-warning)":"var(--color-error)"};">${n}%</span></td>`}r+=`<tr style="border-bottom:1px solid var(--color-border);cursor:pointer;${t===n?"background:var(--color-primary-muted);":""}" onclick="POS.selectRow(${t})">\n                <td style="padding:var(--space-2);color:var(--color-text-muted);">${t+1}</td>\n                <td style="padding:var(--space-2);">\n                    <div style="font-weight:var(--font-weight-semibold);color:var(--color-text-primary);">${e.name}</div>\n                    <div style="font-family:var(--font-mono);font-size:var(--text-caption);color:var(--color-text-muted);">${e.part_number} | Stock: ${e.stock}</div>\n                </td>\n                <td style="text-align:center;padding:var(--space-2);"><input type="number" style="width:50px;text-align:center;font-family:var(--font-mono);background:var(--color-bg-base);color:var(--color-text-primary);border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:2px 4px;" value="${e.quantity}" min="1"\n                    onchange="POS.updateQty(${t}, this.value)" onclick="event.stopPropagation()"></td>\n                <td style="text-align:right;padding:var(--space-2);font-family:var(--font-mono);">${v(e.unit_price)}</td>\n                <td style="text-align:center;padding:var(--space-2);"><input type="number" style="width:45px;text-align:center;font-family:var(--font-mono);background:var(--color-bg-base);color:var(--color-text-primary);border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:2px 4px;" value="${e.discount_pct}" min="0" max="100" step="0.5"\n                    onchange="POS.updateDiscount(${t}, this.value)" onclick="event.stopPropagation()">%</td>\n                <td style="text-align:right;padding:var(--space-2);font-family:var(--font-mono);font-weight:var(--font-weight-bold);">${v(a)}</td>\n                ${c}\n                ${s}\n                <td style="text-align:center;"><button style="background:transparent;border:1px solid var(--color-border);border-radius:var(--radius-sm);width:24px;height:24px;cursor:pointer;color:var(--color-text-muted);font-size:14px;" onclick="event.stopPropagation(); POS.removeFromCart(${t})">&times;</button></td>\n            </tr>`})),e.innerHTML=r,$(),function(){const e=document.getElementById("avgMargin");if(!e||!i)return;let n=0,o=0;if(t.forEach((e=>{if(e.unit_cost>0){const t=e.unit_price*(1-e.discount_pct/100);n+=t*e.quantity,o+=e.unit_cost*e.quantity}})),n>0){const t=(n-o)/n*100;e.textContent=t.toFixed(1)+"%",e.style.color=t>30?"var(--color-success)":t>15?"var(--color-warning)":"var(--color-error)"}else e.textContent="--"}()}function C(e,n){let o=Math.max(0,Math.min(100,parseFloat(n)||0));o>c&&(alert(`Descuento maximo permitido: ${c}%`),o=c),t[e].discount_pct=o,B()}function $(){let e=0,n=0,o=0;t.forEach((t=>{const a=t.unit_price*t.quantity,r=a*t.discount_pct/100,i=a-r,c=i*t.tax_rate;e+=i,n+=r,o+=c}));const a=e+o;document.getElementById("dispSubtotal").textContent=v(e),document.getElementById("dispTax").textContent=v(o),document.getElementById("dispTotal").textContent=v(a),n>0?(document.getElementById("discountRow").style.display="",document.getElementById("dispDiscount").textContent="-"+v(n)):document.getElementById("discountRow").style.display="none"}function S(){let e=0,n=0;return t.forEach((t=>{const o=t.unit_price*t.quantity,a=o-o*t.discount_pct/100,r=a*t.tax_rate;e+=a,n+=r})),Math.round(100*(e+n))/100}async function w(e){if(!e||e.length<2)k();else try{const t=await g(`/pos/api/inventory/items?q=${encodeURIComponent(e)}&per_page=20`),n=document.getElementById("searchResults"),a=document.getElementById("totalsPanel");if(0===t.data.length)n.innerHTML='<div style="padding:20px;text-align:center;color:var(--color-text-muted);">Sin resultados</div>';else{let e="";t.data.forEach((t=>{let n=t.price_1;if(o){const e=o.price_tier||1;n=3===e?t.price_3:2===e?t.price_2:t.price_1}e+=`<div style="padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--color-border);cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:var(--transition-fast);" onmouseover="this.style.background='var(--color-primary-muted)'" onmouseout="this.style.background=''" onclick='POS.addFromSearch(${JSON.stringify(t).replace(/'/g,"&#39;")}, ${n})'>\n                        <div>\n                            <div style="font-weight:var(--font-weight-semibold);">${t.name}</div>\n                            <div style="font-family:var(--font-mono);font-size:var(--text-caption);color:var(--color-text-muted);">${t.part_number} | ${t.brand||""}</div>\n                            <div style="font-size:var(--text-caption);color:${t.stock<=0?"var(--color-error)":"var(--color-text-muted)"};">Stock: ${t.stock}</div>\n                        </div>\n                        <div style="font-family:var(--font-mono);font-weight:var(--font-weight-bold);color:var(--color-primary);">${v(n)}</div>\n                    </div>`})),n.innerHTML=e}n.style.display="",a.style.display="none"}catch(e){console.error("Search error:",e)}}function k(){const e=document.getElementById("searchResults"),t=document.getElementById("totalsPanel");e&&(e.style.display="none"),t&&(t.style.display="")}async function M(e){o=e,document.getElementById("customerAutocomplete").style.display="none",document.getElementById("customerSearchWrap").querySelector("input").style.display="none";if(document.getElementById("customerName").textContent=e.name,document.getElementById("customerTier").textContent={1:"P1 Mostrador",2:"P2 Taller",3:"P3 Mayoreo"}[e.price_tier]||"P1",document.getElementById("customerCredit").textContent=`Credito: ${v(e.credit_balance)} / ${v(e.credit_limit)}`,document.getElementById("customerSelected").style.display="",e.vehicle_info&&e.vehicle_info.length>0){const t=e.vehicle_info[0];document.getElementById("vehicleInfo").textContent=`${t.make||""} ${t.model||""} ${t.year||""} ${t.plates?"("+t.plates+")":""}`,document.getElementById("vehicleBanner").classList.add("visible")}try{const t=await g(`/pos/api/customers/${e.id}`);if(t.recent_purchases&&t.recent_purchases.length>0){const e=t.recent_purchases[0],n=Math.floor((Date.now()-new Date(e.created_at).getTime())/864e5),o=0===n?"hoy":1===n?"hace 1 dia":`hace ${n} dias`;document.getElementById("lastPurchaseInfo").textContent=`${v(e.total)} ${o}`,document.getElementById("vehicleBanner").classList.add("visible")}}catch(e){console.warn("Could not fetch customer detail:",e)}const t=document.getElementById("cfdiHint");t&&e.rfc&&(t.textContent=`RFC: ${e.rfc}`,document.getElementById("cfdiCheck").checked=!!e.rfc),B()}function T(){o=null,document.getElementById("customerSelected").style.display="none";const e=document.getElementById("customerSearch");e&&(e.style.display="",e.value=""),document.getElementById("vehicleBanner").classList.remove("visible");const t=document.getElementById("cfdiHint");t&&(t.textContent=""),B()}function P(){document.getElementById("newCustomerModal").classList.remove("open")}function L(){if(0===t.length)return void f("Carrito vacio");if(!a)return void h();r="efectivo";const e=S();document.getElementById("modalTotal").textContent=v(e),document.getElementById("modalItemCount").textContent=`${t.reduce(((e,t)=>e+t.quantity),0)} productos`,document.getElementById("modalCustomerName").textContent=o?o.name:"Publico General",document.getElementById("cashReceived").value="",document.getElementById("changeDisplay").textContent="$0.00",document.getElementById("changeDisplay").className="cambio-amount positive";const n=document.getElementById("paymentRef");n&&(n.value="");const i=document.getElementById("quickAmounts");if(i){const t=[Math.ceil(e),100*Math.ceil(e/100),500*Math.ceil(e/500),1e3*Math.ceil(e/1e3)],n=[...new Set(t)].slice(0,4);i.innerHTML=n.map((e=>`<button class="quick-btn" onclick="document.getElementById('cashReceived').value=${e};POS.updateChange();">${v(e)}</button>`)).join("")}const c=document.getElementById("refAmount");c&&(c.value=v(e)),document.querySelectorAll(".pago-tab").forEach((e=>e.classList.remove("active"))),document.querySelector('.pago-tab[data-method="efectivo"]').classList.add("active"),document.getElementById("cashPayment").classList.add("active"),document.getElementById("cashPayment").style.display="",document.getElementById("refPayment").classList.remove("active"),document.getElementById("refPayment").style.display="none",document.getElementById("mixedPayment").classList.remove("active"),document.getElementById("mixedPayment").style.display="none";const s=document.getElementById("btnConfirmPayment");s.disabled=!1,s.textContent=`Confirmar Pago — ${v(e)}`,document.getElementById("paymentModal").classList.add("open"),setTimeout((()=>document.getElementById("cashReceived").focus()),100)}function q(){document.getElementById("paymentModal").classList.remove("open")}async function N(){const e=S();let i=0,c=[],d="";if("efectivo"===r){if(i=parseFloat(document.getElementById("cashReceived").value)||0,i<e)return void alert(`Monto insuficiente. Total: ${v(e)}`)}else if("transferencia"===r||"tarjeta"===r)i=e,d=document.getElementById("paymentRef").value.trim();else if("mixto"===r){if(document.querySelectorAll(".mixed-row").forEach((e=>{const t=e.querySelector("select").value,n=parseFloat(e.querySelector(".mixed-amount").value)||0,o=e.querySelectorAll("input")[1]?.value||"";n>0&&(c.push({method:t,amount:n,reference:o}),i+=n)})),i<e)return void alert(`Monto total insuficiente. Falta: ${v(e-i)}`)}const m={items:t.map((e=>({inventory_id:e.inventory_id,quantity:e.quantity,unit_price:e.unit_price,discount_pct:e.discount_pct,tax_rate:e.tax_rate}))),customer_id:o?o.id:null,payment_method:r,sale_type:"cash",register_id:a?a.id:null,amount_paid:i,payment_details:c,reference:d,generate_cfdi:document.getElementById("cfdiCheck").checked},u=document.getElementById("btnConfirmPayment");u.disabled=!0,u.textContent="Procesando...";try{const e=localStorage.getItem("pos_convert_quote_id");let o;if(e){const t={register_id:a?a.id:null,payment_method:r,sale_type:"cash",amount_paid:i,payment_details:c};o=await g("/pos/api/quotations/"+e+"/convert",{method:"POST",body:JSON.stringify(t)}),localStorage.removeItem("pos_convert_quote_id"),f(`Cotizacion #${e} convertida a venta #${o.id}`)}else o=await g("/pos/api/sales",{method:"POST",body:JSON.stringify(m)}),f(`Venta #${o.id} completada`);s=o.id,l=o,q(),O(o),t=[],n=-1,T(),B()}catch(e){alert("Error al procesar venta: "+e.message)}finally{u.disabled=!1,u.textContent="Confirmar Pago"}}async function R(){if(0===t.length)return void f("Carrito vacio");const e={items:t.map((e=>({inventory_id:e.inventory_id,quantity:e.quantity,unit_price:e.unit_price,discount_pct:e.discount_pct,tax_rate:e.tax_rate}))),customer_id:o?o.id:null},n=localStorage.getItem("pos_edit_quote_id");try{if(n){const t=await g("/pos/api/quotations/"+n,{method:"PUT",body:JSON.stringify(e)});localStorage.removeItem("pos_edit_quote_id"),localStorage.removeItem("pos_edit_quote_customer_id"),localStorage.removeItem("pos_edit_quote_notes"),f(`Cotizacion #${n} actualizada. Total: ${v(t.total)}`)}else{const t=await g("/pos/api/quotations",{method:"POST",body:JSON.stringify(e)});f(`Cotizacion #${t.id} guardada. Total: ${v(t.total)}`)}}catch(e){alert("Error: "+e.message)}}function O(e){const t=new Date(e.created_at).toLocaleString("es-MX",{year:"numeric",month:"short",day:"numeric",hour:"2-digit",minute:"2-digit"}),n=o?o.name:"Publico General",i=o&&o.rfc?o.rfc:"";let c="";(e.items||[]).forEach((e=>{const t=e.unit_price*e.quantity*(1-(e.discount_pct||0)/100);c+=`\n                <div class="item-line-wide">\n                    <span class="qty">${e.quantity}</span>\n                    <span class="name">${e.name||""}</span>\n                    <span class="price">${v(e.unit_price)}</span>\n                    <span class="subtotal">${v(e.subtotal||t)}</span>\n                </div>`}));const s=`\n            <div class="store-name">NEXUS AUTOPARTS</div>\n            <div class="store-tagline">Tu conexion con las refacciones</div>\n            <div class="store-info">\n                Sucursal: ${a&&a.branch_name||""}<br>\n                RFC: NAU210315XX1\n            </div>\n            <hr class="divider-double">\n            <div class="folio-line">\n                <span>VENTA: V-${e.id}</span>\n                <span>${t}</span>\n            </div>\n            <div class="ticket-row" style="font-size: 9px; color: #555; margin-bottom: 4px;">\n                <span>Cliente: ${n}</span>\n                ${i?`<span>RFC: ${i}</span>`:""}\n            </div>\n            <hr class="divider">\n            <div class="item-line-wide" style="font-weight: bold; font-size: 9px; color: #555; text-transform: uppercase;">\n                <span class="qty">Cant</span>\n                <span class="name">Descripcion</span>\n                <span class="price">P. Unit</span>\n                <span class="subtotal">Importe</span>\n            </div>\n            <hr class="divider" style="margin: 2px 0;">\n            ${c}\n            <hr class="divider-double">\n            <div class="total-section">\n                <div class="total-line">\n                    <span>Subtotal:</span><span>${v(e.subtotal)}</span>\n                </div>\n                ${e.discount_total>0?`<div class="total-line"><span>Descuento:</span><span>-${v(e.discount_total)}</span></div>`:""}\n                <div class="total-line">\n                    <span>IVA 16%:</span><span>${v(e.tax_total)}</span>\n                </div>\n                <div class="total-line grand">\n                    <span>TOTAL:</span><span>${v(e.total)}</span>\n                </div>\n            </div>\n            <hr class="divider">\n            <div class="payment-section">\n                <div class="ticket-row">\n                    <span>Forma de pago:</span><span>${e.payment_method||r}</span>\n                </div>\n                ${"efectivo"===e.payment_method?`\n                <div class="ticket-row">\n                    <span>Recibido:</span><span>${v(e.amount_paid)}</span>\n                </div>\n                <div class="ticket-row" style="font-weight: bold;">\n                    <span>Cambio:</span><span>${v(e.change_given||0)}</span>\n                </div>`:""}\n            </div>\n            <hr class="divider">\n            <div class="footer-section">\n                <div class="thanks">Gracias por su compra!</div>\n                <div>Conserve su ticket como comprobante.</div>\n            </div>\n        `,l=document.getElementById("ticketContent");l&&(l.innerHTML=s);const d=document.getElementById("ticketPreviewContent");d&&(d.innerHTML=s),document.getElementById("ticketModal").classList.add("open")}function F(){document.getElementById("ticketModal").classList.remove("open")}async function D(){if(s)try{O(await g(`/pos/api/sales/${s}`))}catch(e){alert("Error: "+e.message)}else f("No hay venta reciente")}function A(){f("Comando enviado al cajon de efectivo.")}return async function(){try{const t=JSON.parse(atob(e.split(".")[1]));if(document.getElementById("employeeName").textContent=t.name||"Empleado",document.getElementById("branchName").textContent=t.branch_name||"",i=(t.permissions||[]).includes("pos.view_cost"),c=t.max_discount_pct||100,i){document.getElementById("thCost").style.display="",document.getElementById("thMargin").style.display="";const e=document.getElementById("costToggle");e&&(e.style.display="")}const n=document.querySelector(".status-bar__user-avatar");if(n&&t.name){const e=t.name.split(" ");n.textContent=e.map((e=>e[0])).join("").substring(0,2).toUpperCase()}}catch(e){console.warn("Could not parse token:",e)}const o=localStorage.getItem("pos_cart"),r=localStorage.getItem("pos_edit_quote_id"),s=localStorage.getItem("pos_convert_quote_id");if(o)try{const e=JSON.parse(o);for(const t of e)I(t);localStorage.removeItem("pos_cart")}catch(e){console.warn("Could not load catalog cart:",e)}r&&f(`Modo edicion: Cotizacion #${r}. Guardar actualizara la cotizacion.`),s&&f(`Modo conversion: Cotizacion #${s}. El pago convertira la cotizacion en venta.`),await async function(){try{const e=await g("/pos/api/register/current");e.register?(a=e.register,document.getElementById("registerInfo").innerHTML=`<span>Caja #${e.register.register_number}</span>`):(a=null,document.getElementById("registerInfo").innerHTML='<span style="color:var(--color-error);cursor:pointer;" onclick="POS.showOpenRegisterModal()" title="Clic para abrir caja">&#x26A0; Sin caja abierta — Clic para abrir</span>')}catch(e){console.warn("Register check failed:",e)}}(),document.addEventListener("keydown",(e=>{const o=e.target.tagName,a="INPUT"===o||"TEXTAREA"===o||"SELECT"===o;switch(e.key){case"F1":e.preventDefault(),document.getElementById("itemSearch").focus();break;case"F2":e.preventDefault(),document.getElementById("customerSearch").focus(),document.getElementById("customerSearch").style.display="",document.getElementById("customerSelected").style.display="none";break;case"F3":e.preventDefault(),L();break;case"F4":e.preventDefault(),R();break;case"F5":e.preventDefault(),D();break;case"F6":e.preventDefault(),A();break;case"Escape":if(e.preventDefault(),document.getElementById("paymentModal").classList.contains("open"))q();else if(document.getElementById("newCustomerModal").classList.contains("open"))P();else if(document.getElementById("ticketModal").classList.contains("open"))F();else if(document.querySelector(".confirm-overlay.active")){const e=document.getElementById("overlay-cancelar-venta"),t=document.getElementById("modal-cancelar-venta");e&&e.classList.contains("active")&&(e.classList.remove("active"),t.classList.remove("active"))}else k();break;case"Delete":!a&&n>=0&&n<t.length&&(e.preventDefault(),x(n));break;case"+":!a&&n>=0&&n<t.length&&(e.preventDefault(),t[n].quantity++,B());break;case"-":!a&&n>=0&&n<t.length&&(e.preventDefault(),t[n].quantity>1&&(t[n].quantity--,B()));break;case"*":if(!a&&n>=0&&n<t.length){e.preventDefault();const o=prompt("Descuento %:",t[n].discount_pct);null!==o&&C(n,o)}break;case"ArrowUp":!a&&t.length>0&&(e.preventDefault(),n=Math.max(0,n-1),B());break;case"ArrowDown":!a&&t.length>0&&(e.preventDefault(),n=Math.min(t.length-1,n+1),B());break;case"Enter":"cashReceived"===e.target.id&&(e.preventDefault(),N())}})),function(){const e=document.getElementById("itemSearch");if(!e)return;e.addEventListener("input",(()=>{clearTimeout(d),d=setTimeout((()=>w(e.value.trim())),300)})),e.addEventListener("keydown",(t=>{"Enter"===t.key&&(t.preventDefault(),w(e.value.trim())),"Escape"===t.key&&(e.value="",k())}))}(),function(){const e=document.getElementById("customerSearch");if(!e)return;e.addEventListener("input",(()=>{clearTimeout(m),m=setTimeout((()=>async function(e){if(!e||e.length<2)return void(document.getElementById("customerAutocomplete").style.display="none");try{const t=await g(`/pos/api/customers?q=${encodeURIComponent(e)}&per_page=10`),n=document.getElementById("customerAutocomplete");if(0===t.data.length)n.innerHTML='<div style="padding:var(--space-3);color:var(--color-text-muted);">Sin resultados</div>';else{let e="";t.data.forEach((t=>{const n={1:"Mostrador",2:"Taller",3:"Mayoreo"};e+=`<div style="padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--color-border);cursor:pointer;transition:var(--transition-fast);" onmouseover="this.style.background='var(--color-primary-muted)'" onmouseout="this.style.background=''" onclick='POS.selectCustomer(${JSON.stringify(t).replace(/'/g,"&#39;")})'>\n                        <div style="font-weight:var(--font-weight-semibold);">${t.name}</div>\n                        <div style="font-size:var(--text-caption);color:var(--color-text-muted);">${t.rfc||""} | ${t.phone||""} | ${n[t.price_tier]||"P1"} | Credito: ${v(t.credit_balance)}/${v(t.credit_limit)}</div>\n                    </div>`})),n.innerHTML=e}n.style.display="block"}catch(e){console.error("Customer search error:",e)}}(e.value.trim())),300)})),e.addEventListener("keydown",(t=>{"Escape"===t.key&&(e.value="",document.getElementById("customerAutocomplete").style.display="none")}))}()}(),{addToCart:I,removeFromCart:x,clearCart:function(){t.length=0,n=-1,B()},selectRow:function(e){n=e,B()},updateQty:function(e,n){const o=Math.max(1,parseInt(n)||1);t[e].quantity=o,B()},updateDiscount:C,addFromSearch:function(e,t){I({inventory_id:e.id,part_number:e.part_number,name:e.name,unit_price:t,cost:e.cost,tax_rate:e.tax_rate,stock:e.stock}),k(),document.getElementById("itemSearch").value="",document.getElementById("itemSearch").focus()},hideSearchResults:k,selectCustomer:M,clearCustomer:T,showNewCustomerModal:function(){document.getElementById("newCustomerModal").classList.add("open"),setTimeout((()=>document.getElementById("ncName").focus()),100)},closeNewCustomerModal:P,saveNewCustomer:async function(){const e=document.getElementById("ncName").value.trim();if(!e)return void alert("Nombre es requerido");const t=[],n=document.getElementById("ncVehMake").value.trim();n&&t.push({make:n,model:document.getElementById("ncVehModel").value.trim(),year:document.getElementById("ncVehYear").value.trim(),plates:document.getElementById("ncVehPlates").value.trim()});const o={name:e,rfc:document.getElementById("ncRfc").value.trim()||null,razon_social:document.getElementById("ncRazonSocial").value.trim()||null,regimen_fiscal:document.getElementById("ncRegimenFiscal").value||null,uso_cfdi:document.getElementById("ncUsoCfdi").value||"G03",phone:document.getElementById("ncPhone").value.trim()||null,email:document.getElementById("ncEmail").value.trim()||null,price_tier:parseInt(document.getElementById("ncPriceTier").value)||1,credit_limit:parseFloat(document.getElementById("ncCreditLimit").value)||0,vehicle_info:t.length>0?t:null};try{M({id:(await g("/pos/api/customers",{method:"POST",body:JSON.stringify(o)})).id,name:o.name,rfc:o.rfc,phone:o.phone,price_tier:o.price_tier,credit_limit:o.credit_limit,credit_balance:0,vehicle_info:o.vehicle_info}),P(),f("Cliente creado")}catch(e){alert("Error al crear cliente: "+e.message)}},checkout:L,confirmPayment:N,closePaymentModal:q,selectPaymentMethod:function(e,t){r=e,document.querySelectorAll(".pago-tab").forEach((e=>e.classList.remove("active"))),t&&t.classList.add("active");const n={efectivo:"cashPayment",transferencia:"refPayment",tarjeta:"refPayment",mixto:"mixedPayment"};if(["cashPayment","refPayment","mixedPayment"].forEach((t=>{const o=document.getElementById(t);if(o){const t=o.id===n[e];o.classList.toggle("active",t),o.style.display=t?"":"none"}})),"efectivo"===e&&document.getElementById("cashReceived").focus(),"transferencia"===e||"tarjeta"===e){const e=document.getElementById("paymentRef");e&&e.focus()}},updateChange:function(){const e=S(),t=(parseFloat(document.getElementById("cashReceived").value)||0)-e,n=document.getElementById("changeDisplay");t>=0?(n.textContent=v(t),n.className="cambio-amount positive"):(n.textContent="-"+v(Math.abs(t)),n.className="cambio-amount negative")},updateMixedTotal:function(){const e=S();let t=0;document.querySelectorAll(".mixed-amount").forEach((e=>{t+=parseFloat(e.value)||0}));const n=e-t,o=document.getElementById("mixedRemaining");o.textContent=n>0?`Faltante: ${v(n)}`:`Cubierto (${v(t)})`,o.style.color=n>0?"var(--color-error)":"var(--color-success)"},creditSale:async function(){if(0===t.length)return void alert("Carrito vacio");if(!o)return void alert("Seleccione un cliente para venta a credito");if(!a)return void alert("No hay caja abierta.");const e=S(),r=(o.credit_limit||0)-(o.credit_balance||0);if(o.credit_limit>0&&e>r&&!confirm(`Credito insuficiente. Disponible: ${v(r)}, Total: ${v(e)}. Continuar?`))return;const i={items:t.map((e=>({inventory_id:e.inventory_id,quantity:e.quantity,unit_price:e.unit_price,discount_pct:e.discount_pct,tax_rate:e.tax_rate}))),customer_id:o.id,payment_method:"credito",sale_type:"credit",register_id:a?a.id:null,amount_paid:0};try{const e=await g("/pos/api/sales",{method:"POST",body:JSON.stringify(i)});s=e.id,l=e,O(e),t=[],n=-1,T(),B()}catch(e){alert("Error: "+e.message)}},saveQuotation:R,createLayaway:async function(){if(0===t.length)return void alert("Carrito vacio");if(!o)return void alert("Seleccione un cliente para apartado");const e=S(),r=prompt(`Total: ${v(e)}\nIngrese monto del anticipo:`);if(!r)return;const i=parseFloat(r);if(isNaN(i)||i<=0)return void alert("Monto invalido");if(i>e)return void alert("El anticipo no puede exceder el total");const c={items:t.map((e=>({inventory_id:e.inventory_id,quantity:e.quantity,unit_price:e.unit_price,discount_pct:e.discount_pct,tax_rate:e.tax_rate}))),customer_id:o.id,initial_payment:i,payment_method:"efectivo",register_id:a?a.id:null};try{const e=await g("/pos/api/layaways",{method:"POST",body:JSON.stringify(c)});f(`Apartado #${e.id} creado. Restante: ${v(e.remaining)}`),t=[],n=-1,T(),B()}catch(e){alert("Error: "+e.message)}},showLastSale:D,openDrawer:A,showTicket:O,closeTicketModal:F,printTicket:function(){const e=document.getElementById("ticketPrintArea");e&&(e.style.display="block"),window.print(),setTimeout((()=>{e&&(e.style.display="none")}),500)},connectThermal:async function(){if(!window.NexusPrinter)return void f("Printer module not loaded");const e=await NexusPrinter.connect();e.ok?(f("Impresora conectada: "+(e.name||e.type)),function(){const e=document.getElementById("btnConnectPrinter"),t=document.getElementById("btnThermalPrint");window.NexusPrinter&&NexusPrinter.isConnected()?(e&&(e.style.display="none"),t&&(t.style.display="")):(e&&(e.style.display=""),t&&(t.style.display="none"))}()):f(e.error||"No se pudo conectar la impresora")},thermalPrint:async function(){if(!window.NexusPrinter||!NexusPrinter.isConnected())return void f("Conecte una impresora termica primero");if(!s)return void f("No hay venta para imprimir");f(await NexusPrinter.printSale(s)?"Ticket enviado a impresora termica":"Error al imprimir. Reconecte la impresora.")},showOpenRegisterModal:h,closeOpenRegisterModal:_,openRegister:async function(){const e=parseInt(document.getElementById("regNumber").value),t=parseFloat(document.getElementById("regOpeningAmount").value)||0;if(!e||e<1)document.getElementById("registerOpenResult").innerHTML='<span style="color:var(--color-error);">Numero de caja invalido</span>';else try{const n=await g("/pos/api/register/open",{method:"POST",body:JSON.stringify({register_number:e,opening_amount:t})});if(n.error)return void(document.getElementById("registerOpenResult").innerHTML='<span style="color:var(--color-error);">'+(n.error||"Error")+"</span>");a=n,document.getElementById("registerInfo").innerHTML=`<span>Caja #${n.register_number}</span>`,_(),f(`Caja #${n.register_number} abierta con $${t.toFixed(2)}`)}catch(e){document.getElementById("registerOpenResult").innerHTML='<span style="color:var(--color-error);">Error de red</span>'}},showCutZModal:function(){document.getElementById("cutZModal").classList.add("open"),document.getElementById("cutZResult").innerHTML="",b()},closeCutZModal:E,loadCutX:b,confirmCutZ:async function(){const e=parseFloat(document.getElementById("cutZClosingAmount").value)||0;try{const t=await g("/pos/api/register/cut-z",{method:"POST",body:JSON.stringify({closing_amount:e})});if(t.error)return void(document.getElementById("cutZResult").innerHTML='<span style="color:var(--color-error);">'+t.error+"</span>");t.difference>0||t.difference;document.getElementById("cutZResult").innerHTML='<span style="color:var(--color-success);">Caja cerrada correctamente</span>',document.getElementById("registerInfo").innerHTML='<span style="color:var(--color-text-muted);" onclick="POS.showOpenRegisterModal()">Sin caja abierta</span>',a=null,E(),f("Corte Z completado. Diferencia: $"+t.difference.toFixed(2))}catch(e){document.getElementById("cutZResult").innerHTML='<span style="color:var(--color-error);">Error de red</span>'}}}})();
\ No newline at end of file
diff --git a/pos/static/js/sidebar.js b/pos/static/js/sidebar.js
index 9b30727..b742337 100644
--- a/pos/static/js/sidebar.js
+++ b/pos/static/js/sidebar.js
@@ -29,6 +29,7 @@
             { name: _t('customers'), href: '/pos/customers', icon: '<path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2"/><circle cx="9" cy="7" r="4"/><path d="M23 21v-2a4 4 0 0 0-3-3.87M16 3.13a4 4 0 0 1 0 7.75"/>' },
             { name: 'Cotizaciones', href: '/pos/quotations', icon: '<path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/><polyline points="14 2 14 8 20 8"/><line x1="9" y1="15" x2="15" y2="15"/><line x1="12" y1="12" x2="12" y2="18"/>' },
             { name: 'Marketplace', href: '/pos/marketplace', icon: '<circle cx="9" cy="21" r="1"/><circle cx="20" cy="21" r="1"/><path d="M1 1h4l2.68 13.39a2 2 0 0 0 2 1.61h9.72a2 2 0 0 0 2-1.61L23 6H6"/>' },
+            { name: 'MercadoLibre', href: '/pos/marketplace-external', icon: '<rect x="2" y="3" width="20" height="14" rx="2"/><path d="M8 21h8M12 17v4"/>' },
             { name: _t('invoicing'), href: '/pos/invoicing', icon: '<path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/><polyline points="14 2 14 8 20 8"/><line x1="16" y1="13" x2="8" y2="13"/><line x1="16" y1="17" x2="8" y2="17"/><polyline points="10 9 9 9 8 9"/>' },
             { name: _t('accounting'), href: '/pos/accounting', icon: '<line x1="12" y1="1" x2="12" y2="23"/><path d="M17 5H9.5a3.5 3.5 0 0 0 0 7h5a3.5 3.5 0 0 1 0 7H6"/>' },
             { name: _t('reports'), href: '/pos/reports', icon: '<line x1="18" y1="20" x2="18" y2="10"/><line x1="12" y1="20" x2="12" y2="4"/><line x1="6" y1="20" x2="6" y2="14"/>' },
@@ -180,4 +181,7 @@
     window.toggleSidebar = toggleSidebar;
     window.closeSidebar = closeSidebar;
 
+    // Reveal sidebar smoothly after replacement to avoid flash/stun
+    document.body.classList.add('sidebar-ready');
+
 })();
diff --git a/pos/static/js/whatsapp2.js b/pos/static/js/whatsapp2.js
index 8a7608f..c41c099 100644
--- a/pos/static/js/whatsapp2.js
+++ b/pos/static/js/whatsapp2.js
@@ -16,6 +16,7 @@
   var activePhone = null;
   var pollTimer = null;
   var statusPollTimer = null;
+  var qrPollTimer = null;
   var connectionState = 'unknown'; // 'open', 'close', 'connecting', 'unknown'
 
   // -- Helpers ---------------------------------------------------------------
@@ -88,6 +89,10 @@
     api('GET', '/status').then(function (data) {
       var state = (data.instance || data).state || data.state || 'close';
       updateConnectionUI(state);
+      // If bridge already has a QR ready, show it immediately
+      if (state === 'qr' || state === 'connecting') {
+        fetchQR();
+      }
     }).catch(function () {
       updateConnectionUI('close');
     });
@@ -106,7 +111,8 @@
       // Load conversations + start polling on page load / reconnect
       loadConversations();
       startPolling();
-    } else if (state === 'connecting') {
+      stopQRPolling();
+    } else if (state === 'connecting' || state === 'qr') {
       statusDot.className = 'status-dot status-dot--warn';
       statusText.textContent = 'Escaneando QR...';
       connectSection.style.display = 'flex';
@@ -125,6 +131,7 @@
       refreshQrBtn.style.display = 'none';
       qrImg.style.display = 'none';
       qrPlaceholder.style.display = '';
+      stopQRPolling();
     }
   }
 
@@ -141,8 +148,15 @@
         return;
       }
 
-      // Instance created, now fetch QR
-      fetchQR();
+      // Switch UI to connecting state immediately
+      updateConnectionUI('connecting');
+      qrPlaceholder.textContent = 'Iniciando conexion con WhatsApp, generando QR...';
+      qrPlaceholder.style.display = '';
+      qrImg.style.display = 'none';
+
+      // Start polling for QR; the first fetchQR may not have QR ready yet
+      startStatusPolling();
+      startQRPolling();
     }).catch(function () {
       connectBtn.disabled = false;
       connectBtn.textContent = 'Conectar WhatsApp';
@@ -151,7 +165,10 @@
   }
 
   function fetchQR() {
-    qrPlaceholder.textContent = 'Generando QR...';
+    // Only update placeholder text if we don't already have a QR image showing
+    if (qrImg.style.display !== 'block') {
+      qrPlaceholder.textContent = 'Generando codigo QR, espera unos segundos...';
+    }
 
     api('GET', '/qr').then(function (data) {
       var base64 = data.qr || data.base64 || data.qrcode || '';
@@ -164,14 +181,18 @@
 
         // Start polling for connection state while QR is shown
         startStatusPolling();
+        startQRPolling();
       } else if ((data.instance && data.instance.state === 'open') || data.state === 'open') {
         // Already connected
         updateConnectionUI('open');
         loadConversations();
       } else {
-        qrPlaceholder.textContent = 'No se pudo generar el QR. Intenta de nuevo.';
-        qrPlaceholder.style.display = '';
-        qrImg.style.display = 'none';
+        // QR not ready yet — this is normal right after pressing Connect
+        if (qrImg.style.display !== 'block') {
+          qrPlaceholder.textContent = 'Generando codigo QR, por favor espera... (el codigo cambia cada pocos segundos, escanealo en cuanto aparezca)';
+          qrPlaceholder.style.display = '';
+          qrImg.style.display = 'none';
+        }
       }
     }).catch(function () {
       qrPlaceholder.textContent = 'Error al obtener QR';
@@ -208,6 +229,24 @@
     }
   }
 
+  function startQRPolling() {
+    stopQRPolling();
+    qrPollTimer = setInterval(function () {
+      if (connectionState === 'connecting' || connectionState === 'qr') {
+        fetchQR();
+      } else {
+        stopQRPolling();
+      }
+    }, 5000);
+  }
+
+  function stopQRPolling() {
+    if (qrPollTimer) {
+      clearInterval(qrPollTimer);
+      qrPollTimer = null;
+    }
+  }
+
   connectBtn.addEventListener('click', doConnect);
   disconnectBtn.addEventListener('click', doDisconnect);
   refreshQrBtn.addEventListener('click', fetchQR);
diff --git a/pos/static/pwa/sw.js b/pos/static/pwa/sw.js
index 15917cb..bd861fa 100644
--- a/pos/static/pwa/sw.js
+++ b/pos/static/pwa/sw.js
@@ -1,8 +1,8 @@
 // /home/Autopartes/pos/static/pwa/sw.js
-// Nexus POS — Service Worker v6
+// Nexus POS — Service Worker v9
 // Self-contained vanilla JS. No external imports.
 
-const CACHE_NAME = 'nexus-pos-v6';
+const CACHE_NAME = 'nexus-pos-v11';
 
 const APP_SHELL = [
   '/pos/static/css/tokens.css',
diff --git a/pos/tasks.py b/pos/tasks.py
index 8423169..3d83e0e 100644
--- a/pos/tasks.py
+++ b/pos/tasks.py
@@ -98,6 +98,133 @@ def generate_report_task(self, report_type, params, tenant_id):
     }
 
 
+# ─── MercadoLibre Tasks ───────────────────────────────────────────────────
+
+@celery.task(bind=True, max_retries=3)
+def sync_meli_stock_price_task(self, tenant_id: int):
+    """Sync stock and price for all active ML listings."""
+    from services import marketplace_external_service as meli_svc
+    from tenant_db import get_tenant_conn
+
+    conn = get_tenant_conn(tenant_id)
+    try:
+        cfg = meli_svc.get_meli_config(conn)
+        svc = meli_svc._get_meli_service(cfg)
+        if not svc:
+            return {'error': 'MercadoLibre not configured'}
+
+        cur = conn.cursor()
+        cur.execute(
+            """
+            SELECT id, inventory_id, external_item_id, publish_price
+            FROM marketplace_listings
+            WHERE is_active = true AND channel = 'mercadolibre'
+            """
+        )
+        listings = cur.fetchall()
+        cur.close()
+
+        from services.inventory_engine import get_stock_bulk
+        stock_map = get_stock_bulk(conn, branch_id=None)
+
+        updated = 0
+        failed = 0
+        for row in listings:
+            listing_id, inv_id, ext_id, last_price = row
+            cur = conn.cursor()
+            cur.execute("SELECT price_1 FROM inventory WHERE id = %s", (inv_id,))
+            price_row = cur.fetchone()
+            cur.close()
+            current_price = float(price_row[0]) if price_row and price_row[0] else 0
+            current_stock = stock_map.get(inv_id, 0)
+
+            try:
+                svc.update_item(
+                    ext_id,
+                    {"price": round(current_price, 2), "available_quantity": max(current_stock, 0)},
+                )
+                cur = conn.cursor()
+                cur.execute(
+                    """
+                    UPDATE marketplace_listings
+                    SET last_sync_at = NOW(), sync_errors = NULL, publish_price = %s
+                    WHERE id = %s
+                    """,
+                    (current_price, listing_id),
+                )
+                conn.commit()
+                cur.close()
+                updated += 1
+            except Exception as e:
+                conn.rollback()
+                cur = conn.cursor()
+                cur.execute(
+                    "UPDATE marketplace_listings SET sync_errors = %s WHERE id = %s",
+                    (str(e)[:500], listing_id),
+                )
+                conn.commit()
+                cur.close()
+                failed += 1
+
+        return {'updated': updated, 'failed': failed, 'total': len(listings)}
+    finally:
+        conn.close()
+
+
+@celery.task(bind=True, max_retries=3)
+def sync_meli_orders_task(self, tenant_id: int):
+    """Fetch new orders from MercadoLibre."""
+    from services import marketplace_external_service as meli_svc
+    from tenant_db import get_tenant_conn
+
+    conn = get_tenant_conn(tenant_id)
+    try:
+        # Determine last check date from most recent order
+        cur = conn.cursor()
+        cur.execute(
+            "SELECT MAX(created_at) FROM marketplace_orders WHERE channel = 'mercadolibre'"
+        )
+        row = cur.fetchone()
+        last_check = row[0]
+        cur.close()
+
+        date_from = None
+        if last_check:
+            date_from = last_check.strftime('%Y-%m-%dT%H:%M:%S.000-00:00')
+
+        result = meli_svc.fetch_and_save_orders(conn, date_from=date_from)
+        return result
+    except Exception as e:
+        return {'error': str(e)}
+    finally:
+        conn.close()
+
+
+@celery.task(bind=True, max_retries=3)
+def process_meli_webhook_task(self, tenant_id: int, topic: str, resource: str):
+    """Process incoming MercadoLibre webhook asynchronously."""
+    from services import marketplace_external_service as meli_svc
+    from tenant_db import get_tenant_conn
+
+    conn = get_tenant_conn(tenant_id)
+    try:
+        if topic.startswith("orders"):
+            # Fetch full order and upsert
+            cfg = meli_svc.get_meli_config(conn)
+            svc = meli_svc._get_meli_service(cfg)
+            if svc and resource:
+                order_id = resource.split("/")[-1]
+                full = svc.get_order(order_id)
+                # Re-use fetch_and_save_orders by passing the order directly
+                # For simplicity, trigger a full sync for recent orders
+                return meli_svc.fetch_and_save_orders(conn)
+        return {'ok': True, 'topic': topic}
+    except Exception as e:
+        return {'error': str(e)}
+    finally:
+        conn.close()
+
+
 @celery.task(bind=True, max_retries=2)
 def sync_vehicle_compatibility_task(self, tenant_id, item_id, part_number, name, brand, compat_source):
     """Fetch AI/TecDoc vehicle compatibility in background after item creation."""
diff --git a/pos/templates/accounting.html b/pos/templates/accounting.html
index 7e290bd..6203bd7 100644
--- a/pos/templates/accounting.html
+++ b/pos/templates/accounting.html
@@ -188,10 +188,10 @@
       <!-- Tabs -->
       <div class="tabs-row" role="tablist">
         <button class="tab-btn is-active" role="tab" aria-selected="true" onclick="switchTab('cxc')">
-          Ctas. por Cobrar <span class="tab-btn__badge">23</span>
+          Ctas. por Cobrar <span class="tab-btn__badge" id="badge-cxc">0</span>
         </button>
         <button class="tab-btn" role="tab" aria-selected="false" onclick="switchTab('cxp')">
-          Ctas. por Pagar <span class="tab-btn__badge--alert tab-btn__badge">3</span>
+          Ctas. por Pagar <span class="tab-btn__badge--alert tab-btn__badge" id="badge-cxp">0</span>
         </button>
         <button class="tab-btn" role="tab" aria-selected="false" onclick="switchTab('balance')">
           Balance General
@@ -498,5 +498,31 @@
   <script src="/pos/static/js/pwa-install.js" defer></script>
 
   <script src="/pos/static/js/chat.js" defer></script>
+
+  <script>
+    // Load accounting stats for tab badges
+    async function loadAccountingStats() {
+      const token = localStorage.getItem('pos_token') || '';
+      try {
+        const res = await fetch('/pos/api/accounting/stats', {
+          headers: token ? { 'Authorization': 'Bearer ' + token } : {}
+        });
+        if (!res.ok) return;
+        const data = await res.json();
+        const map = {
+          'badge-cxc': data.cuentas_cobrar,
+          'badge-cxp': data.cuentas_pagar
+        };
+        Object.entries(map).forEach(function([id, val]) {
+          const el = document.getElementById(id);
+          if (el) el.textContent = val || 0;
+        });
+      } catch (e) {
+        console.error('Failed to load accounting stats:', e);
+      }
+    }
+    window.loadAccountingStats = loadAccountingStats;
+    loadAccountingStats();
+  </script>
 </body>
 </html>
diff --git a/pos/templates/customers.html b/pos/templates/customers.html
index 1bc6841..cd55a4b 100644
--- a/pos/templates/customers.html
+++ b/pos/templates/customers.html
@@ -420,6 +420,10 @@
                     <div class="credit-metric__label">Utilizado</div>
                     <div class="credit-metric__value used" id="detailCreditUsed">$31,500</div>
                   </div>
+                  <div class="credit-metric">
+                    <div class="credit-metric__label">Descuento Max</div>
+                    <div class="credit-metric__value" id="detailMaxDiscount">0%</div>
+                  </div>
                 </div>
                 <div class="credit-progress">
                   <div class="credit-progress__labels">
@@ -611,7 +615,7 @@
     </div>
     <div class="panel-footer">
       <button class="btn-edit" onclick="if(typeof Customers!=='undefined') Customers.editCurrent();">Editar Cliente</button>
-      <button class="btn-sale" onclick="window.location.href='/pos/';">Nueva Venta</button>
+      <button class="btn-sale" onclick="window.location.href='/pos/sale';">Nueva Venta</button>
     </div>
   </div>
 
diff --git a/pos/templates/inventory.html b/pos/templates/inventory.html
index 6973319..a6efc7a 100644
--- a/pos/templates/inventory.html
+++ b/pos/templates/inventory.html
@@ -13,7 +13,7 @@
   <link rel="manifest" href="/pos/static/pwa/manifest.json" />
   <meta name="theme-color" content="#F5A623" />
 
-  <link rel="stylesheet" href="/pos/static/css/inventory.css">
+  <link rel="stylesheet" href="/pos/static/css/inventory.css?v=4">
 </head>
 
 <body>
@@ -306,10 +306,18 @@
                 ]);
             }
             </script>
+            <button class="btn btn--ghost btn--sm" onclick="showTierDiscountModal()">
+              <svg viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><line x1="12" y1="6" x2="12" y2="12"/><line x1="16.24" y1="16.24" x2="12" y2="12"/></svg>
+              <span id="tierDiscountBadge">Taller -15% · Mayoreo -25%</span>
+            </button>
             <button class="btn btn--primary btn--sm" onclick="showCreateModal()">
               <svg viewBox="0 0 24 24"><line x1="12" y1="5" x2="12" y2="19"/><line x1="5" y1="12" x2="19" y2="12"/></svg>
               Nuevo Producto
             </button>
+            <button class="btn btn--sm btn--meli" id="btnPublishML" style="display:none;" onclick="openMeliPublishModal()">
+              <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><rect x="2" y="3" width="20" height="14" rx="2"/><path d="M8 21h8M12 17v4"/></svg>
+              Publicar en ML <span id="meliSelectedCountBadge" style="background:#2D3277;color:#FFE600;border-radius:10px;padding:0 6px;font-size:11px;margin-left:4px;">0</span>
+            </button>
           </div>
 
           <div class="table-wrapper">
@@ -317,6 +325,7 @@
               <table class="data-table" id="stockTable">
                 <thead>
                   <tr>
+                    <th style="width:32px;"><input type="checkbox" id="selectAllItems" onclick="toggleSelectAllItems()" title="Seleccionar todos" /></th>
                     <th style="font-size:var(--text-caption);color:var(--color-text-muted);">ID</th>
                     <th>Barcode</th>
                     <th>No. Parte</th>
@@ -324,9 +333,9 @@
                     <th>Marca</th>
                     <th style="text-align:right">Stock</th>
                     <th style="text-align:right">Costo</th>
-                    <th style="text-align:right">Precio 1</th>
-                    <th style="text-align:right">Precio 2</th>
-                    <th style="text-align:right">Precio 3</th>
+                    <th style="text-align:right">Mostrador</th>
+                    <th style="text-align:right">Taller</th>
+                    <th style="text-align:right">Mayoreo</th>
                     <th>Ubicación</th>
                     <th>Acciones</th>
                   </tr>
@@ -689,9 +698,7 @@
           <div class="inv-field"><label>Marca</label><input type="text" id="newBrand" placeholder="Marca" /></div>
           <div class="inv-field"><label>Barcode</label><input type="text" id="newBarcode" placeholder="Auto-generado si vacío" /></div>
           <div class="inv-field"><label>Costo</label><input type="number" id="newCost" step="0.01" placeholder="0.00" /></div>
-          <div class="inv-field"><label>Precio 1</label><input type="number" id="newPrice1" step="0.01" placeholder="0.00" /></div>
-          <div class="inv-field"><label>Precio 2</label><input type="number" id="newPrice2" step="0.01" placeholder="0.00" /></div>
-          <div class="inv-field"><label>Precio 3</label><input type="number" id="newPrice3" step="0.01" placeholder="0.00" /></div>
+          <div class="inv-field"><label>Precio Mostrador</label><input type="number" id="newPrice1" step="0.01" placeholder="0.00" /></div>
           <div class="inv-field"><label>Stock Mínimo</label><input type="number" id="newMinStock" placeholder="0" /></div>
           <div class="inv-field"><label>Stock Inicial</label><input type="number" id="newInitialStock" placeholder="0" /></div>
           <div class="inv-field"><label>Ubicación</label><input type="text" id="newLocation" placeholder="Ej: A-12-3" /></div>
@@ -809,6 +816,73 @@
     </div>
   </div>
 
+  <!-- Tier Discounts Modal -->
+  <div class="inv-modal-overlay" id="tierDiscountModal">
+    <div class="inv-modal">
+      <div class="inv-modal__header">
+        <h3>Descuentos por Tipo de Cliente</h3>
+        <button class="inv-modal__close" onclick="closeTierDiscountModal()">&times;</button>
+      </div>
+      <div class="inv-modal__body">
+        <p style="font-size:var(--text-caption);color:var(--color-text-muted);margin-bottom:var(--space-4);">Estos descuentos se aplican automáticamente a todos los productos al calcular precios de Taller y Mayoreo.</p>
+        <div style="display:grid;grid-template-columns:1fr 1fr;gap:16px;">
+          <div class="inv-field"><label>Descuento Taller (%)</label><input type="number" id="tierDisc2" step="0.1" min="0" max="100" placeholder="15" /></div>
+          <div class="inv-field"><label>Descuento Mayoreo (%)</label><input type="number" id="tierDisc3" step="0.1" min="0" max="100" placeholder="25" /></div>
+        </div>
+      </div>
+      <div class="inv-modal__footer">
+        <button class="btn btn--ghost" onclick="closeTierDiscountModal()">Cancelar</button>
+        <button class="btn btn--primary" onclick="saveTierDiscounts()">Guardar</button>
+      </div>
+    </div>
+  </div>
+
+  <!-- ══════════ Publicar en MercadoLibre Modal ══════════ -->
+  <div class="inv-modal-overlay" id="meliPublishModal">
+    <div class="inv-modal inv-modal--wide">
+      <div class="inv-modal__header">
+        <h3>Publicar en MercadoLibre</h3>
+        <button class="inv-modal__close" onclick="closeMeliPublishModal()">&times;</button>
+      </div>
+      <div class="inv-modal__body">
+        <div id="meliPublishSelectedCount" style="font-size:var(--text-caption);color:var(--color-text-muted);margin-bottom:var(--space-3);">0 productos seleccionados</div>
+        <div id="meliPublishItemsPreview" style="max-height:200px;overflow-y:auto;border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-3);margin-bottom:var(--space-4);">
+          <p style="color:var(--color-text-muted);font-size:var(--text-caption);">Selecciona productos del inventario para ver el preview.</p>
+        </div>
+        <div style="display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;margin-bottom:var(--space-4);">
+          <div class="inv-field">
+            <label>Categoría ML *</label>
+            <div style="position:relative;">
+              <input type="text" id="meliCategorySearch" placeholder="Buscar categoría..." oninput="searchMeliCategories()" onkeydown="handleMeliCatKeydown(event)" autocomplete="off" />
+              <div id="meliCategoryResults"></div>
+            </div>
+            <input type="hidden" id="meliCategoryId" />
+          </div>
+          <div class="inv-field">
+            <label>Tipo de Publicación</label>
+            <select id="meliListingType">
+              <option value="gold_special">Gold Special</option>
+              <option value="gold_pro">Gold Pro</option>
+              <option value="bronze">Bronce (gratis)</option>
+            </select>
+          </div>
+          <div class="inv-field">
+            <label>Modo de Envío</label>
+            <select id="meliShippingMode">
+              <option value="me2" selected>MercadoEnvíos (me2)</option>
+            </select>
+            <small style="color:var(--color-text-muted);font-size:var(--text-caption);">Tu cuenta requiere ME2 obligatoriamente.</small>
+          </div>
+        </div>
+        <div id="meliPublishResult" style="min-height:1.5em;"></div>
+      </div>
+      <div class="inv-modal__footer">
+        <button class="btn btn--ghost" onclick="closeMeliPublishModal()">Cancelar</button>
+        <button class="btn btn--meli" id="meliPublishBtn" onclick="executeMeliPublish()"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><rect x="2" y="3" width="20" height="14" rx="2"/><path d="M8 21h8M12 17v4"/></svg> Publicar</button>
+      </div>
+    </div>
+  </div>
+
   <!-- Offline Banner -->
   <div id="offlineBanner" class="banner banner--warning" style="display:none;position:fixed;top:0;left:0;right:0;z-index:9999;border-radius:0;animation:none;">
     <span class="banner__icon"></span>
@@ -821,7 +895,7 @@
   <script src="/pos/static/js/pos-utils.js" defer></script>
   <script src="/pos/static/js/sidebar.js" defer></script>
   <script src="/pos/static/js/virtual-scroll.js" defer></script>
-  <script src="/pos/static/js/inventory.js?v=5" defer></script>
+  <script src="/pos/static/js/inventory.js?v=10" defer></script>
   <script src="/pos/static/js/offline-banner.js" defer></script>
   <script src="/pos/static/js/sync-engine.js" defer></script>
   <script>if('serviceWorker' in navigator){navigator.serviceWorker.register('/pos/sw.js',{scope:'/pos/'});}</script>
diff --git a/pos/templates/invoicing.html b/pos/templates/invoicing.html
index 1c8f036..ad5b2af 100644
--- a/pos/templates/invoicing.html
+++ b/pos/templates/invoicing.html
@@ -301,16 +301,16 @@
       <!-- Tabs Row -->
       <div class="tabs-row" role="tablist" aria-label="Módulos de Facturación">
         <button class="tab-btn is-active" role="tab" aria-selected="true"  aria-controls="panel-facturas"     id="tab-facturas"     onclick="switchTab('facturas')">
-          Facturas <span class="tab-btn__badge">247</span>
+          Facturas <span class="tab-btn__badge" id="badge-facturas">0</span>
         </button>
         <button class="tab-btn" role="tab" aria-selected="false" aria-controls="panel-notas"        id="tab-notas"        onclick="switchTab('notas')">
-          Notas de Crédito <span class="tab-btn__badge">8</span>
+          Notas de Crédito <span class="tab-btn__badge" id="badge-notas-credito">0</span>
         </button>
         <button class="tab-btn" role="tab" aria-selected="false" aria-controls="panel-complementos" id="tab-complementos" onclick="switchTab('complementos')">
-          Complementos de Pago <span class="tab-btn__badge">12</span>
+          Complementos de Pago <span class="tab-btn__badge" id="badge-complementos">0</span>
         </button>
         <button class="tab-btn" role="tab" aria-selected="false" aria-controls="panel-cancelaciones" id="tab-cancelaciones" onclick="switchTab('cancelaciones')">
-          Cancelaciones <span class="tab-btn__badge tab-btn__badge--warn">6</span>
+          Cancelaciones <span class="tab-btn__badge tab-btn__badge--warn" id="badge-cancelaciones">0</span>
         </button>
         <button class="tab-btn" role="tab" aria-selected="false" aria-controls="panel-config"       id="tab-config"       onclick="switchTab('config')">
           Configuración CFDI
@@ -1060,5 +1060,33 @@
   <script src="/pos/static/js/pwa-install.js" defer></script>
 
   <script src="/pos/static/js/chat.js" defer></script>
+
+  <script>
+    // Load invoicing stats for tab badges
+    async function loadInvoicingStats() {
+      const token = localStorage.getItem('pos_token') || '';
+      try {
+        const res = await fetch('/pos/api/invoicing/stats', {
+          headers: token ? { 'Authorization': 'Bearer ' + token } : {}
+        });
+        if (!res.ok) return;
+        const data = await res.json();
+        const map = {
+          'badge-facturas': data.facturas,
+          'badge-notas-credito': data.notas_credito,
+          'badge-complementos': data.complementos,
+          'badge-cancelaciones': data.cancelaciones
+        };
+        Object.entries(map).forEach(function([id, val]) {
+          const el = document.getElementById(id);
+          if (el) el.textContent = val || 0;
+        });
+      } catch (e) {
+        console.error('Failed to load invoicing stats:', e);
+      }
+    }
+    window.loadInvoicingStats = loadInvoicingStats;
+    loadInvoicingStats();
+  </script>
 </body>
 </html>
diff --git a/pos/templates/login.html b/pos/templates/login.html
index 5f9af7f..85624c5 100644
--- a/pos/templates/login.html
+++ b/pos/templates/login.html
@@ -291,6 +291,13 @@
       btnLogin.disabled = !canLogin;
     }
 
+    /* ------------------------------------------------------------------
+       LOGIN BUTTON CLICK
+       ------------------------------------------------------------------ */
+    btnLogin.addEventListener('click', function() {
+      triggerLogin();
+    });
+
     /* ------------------------------------------------------------------
        TRIGGER LOGIN (demo)
        ------------------------------------------------------------------ */
diff --git a/pos/templates/marketplace.html b/pos/templates/marketplace.html
index c712570..eb3b950 100644
--- a/pos/templates/marketplace.html
+++ b/pos/templates/marketplace.html
@@ -57,10 +57,11 @@
     <h2 style="margin-bottom:var(--space-4);font-family:var(--font-heading);">Mi Inventario</h2>
     <div class="upload-box">
       <label>Cargar inventario via CSV</label>
-      <textarea id="csvText" placeholder="part_number,stock,price&#10;AB-123,5,150.50&#10;CD-456,12,89.00"></textarea>
+      <textarea id="csvText" placeholder="part_number,stock,price,name&#10;AB-123,5,150.50,Filtro de aceite&#10;CD-456,12,89.00,Balata delantera"></textarea>
       <div class="hint">
         Columnas requeridas: <code>part_number, stock, price</code>.
-        Opcionales: <code>min_order, warehouse_location, currency</code>.
+        Opcionales: <code>name, min_order, warehouse_location, currency</code>.
+        <br>Si la parte no existe en el catálogo, se crea automáticamente como <em>seller listing</em>.
       </div>
       <button style="margin-top:var(--space-3);padding:var(--space-3) var(--space-6);background:var(--gradient-accent);color:var(--btn-primary-text);border:none;border-radius:var(--radius-md);font-weight:bold;cursor:pointer;" onclick="uploadCSV()">Subir CSV</button>
       <div id="uploadResult" style="margin-top:var(--space-3);font-size:var(--text-body-sm);"></div>
@@ -205,8 +206,18 @@
           var priceStr = p.min_price === p.max_price
             ? '$' + fmt(p.min_price)
             : '$' + fmt(p.min_price) + ' – $' + fmt(p.max_price);
-          return '<div class="part-card" onclick="openPartDetail(' + p.id_part + ')">' +
-            '<div class="part-card__oem">' + esc(p.oem_part_number) + '</div>' +
+          var isOem = p.listing_type === 'oem';
+          var badge = isOem
+            ? '<span style="background:#3FB95020;color:#3FB950;padding:2px 6px;border-radius:4px;font-size:var(--text-caption);">Catálogo</span>'
+            : '<span style="background:#F5A62320;color:#F5A623;padding:2px 6px;border-radius:4px;font-size:var(--text-caption);">Listing</span>';
+          var onclick = isOem
+            ? 'openPartDetail(' + p.id + ')'
+            : 'openListingDetail(' + p.id + ')';
+          return '<div class="part-card" onclick="' + onclick + '">' +
+            '<div style="display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-1);">' +
+              '<div class="part-card__oem">' + esc(p.part_number) + '</div>' +
+              badge +
+            '</div>' +
             '<div class="part-card__name">' + esc(p.name) + '</div>' +
             '<div class="part-card__meta">' +
               '<span class="price-range">' + priceStr + '</span>' +
@@ -248,7 +259,7 @@
             '</div>' +
             '<div style="text-align:right;">' +
               '<div class="price-range">$' + fmt(b.price) + '</div>' +
-              '<button style="margin-top:var(--space-1);padding:var(--space-1) var(--space-3);background:var(--gradient-accent);color:var(--btn-primary-text);border:none;border-radius:var(--radius-sm);font-size:var(--text-caption);cursor:pointer;" onclick="createOrderFor(' + partId + ', ' + b.id_bodega + ', \'' + esc(b.name).replace(/\'/g, '\\\'') + '\', ' + (b.price || 0) + ')">Ordenar</button>' +
+              '<button style="margin-top:var(--space-1);padding:var(--space-1) var(--space-3);background:var(--gradient-accent);color:var(--btn-primary-text);border:none;border-radius:var(--radius-sm);font-size:var(--text-caption);cursor:pointer;" onclick="createOrderFor(' + partId + ', null, ' + b.id_bodega + ', \'' + esc(b.name).replace(/\'/g, '\\\'') + '\', ' + (b.price || 0) + ')">Ordenar</button>' +
             '</div>' +
           '</div>';
         });
@@ -257,7 +268,38 @@
       });
     };
 
-    window.createOrderFor = function (partId, bodegaId, bodegaName, price) {
+    window.openListingDetail = function (wiId) {
+      var modal = document.getElementById('partModal');
+      modal.classList.add('open');
+      document.getElementById('partModalBody').innerHTML = 'Cargando bodegas...';
+
+      apiFetch('/inventory/listing/' + wiId).then(function (resp) {
+        if (!resp || !resp.data) return;
+        var bodegas = resp.data;
+        if (bodegas.length === 0) {
+          document.getElementById('partModalBody').innerHTML = '<div class="empty-state">Ninguna bodega tiene esta parte en stock.</div>';
+          return;
+        }
+        var html = '<p style="color:var(--color-text-muted);margin-bottom:var(--space-3);">Elige una bodega para ordenar:</p>';
+        html += '<div style="display:flex;flex-direction:column;gap:var(--space-2);">';
+        bodegas.forEach(function (b) {
+          html += '<div style="padding:var(--space-3);border:1px solid var(--glass-border);border-radius:var(--radius-md);display:flex;justify-content:space-between;align-items:center;">' +
+            '<div>' +
+              '<strong>' + esc(b.name) + '</strong>' +
+              '<div style="color:var(--color-text-muted);font-size:var(--text-caption);">' + esc(b.city || '') + ' · ' + esc(b.stock_hint) + '</div>' +
+            '</div>' +
+            '<div style="text-align:right;">' +
+              '<div class="price-range">$' + fmt(b.price) + '</div>' +
+              '<button style="margin-top:var(--space-1);padding:var(--space-1) var(--space-3);background:var(--gradient-accent);color:var(--btn-primary-text);border:none;border-radius:var(--radius-sm);font-size:var(--text-caption);cursor:pointer;" onclick="createOrderFor(null, ' + wiId + ', ' + b.id_bodega + ', \'' + esc(b.name).replace(/\'/g, '\\\'') + '\', ' + (b.price || 0) + ')">Ordenar</button>' +
+            '</div>' +
+          '</div>';
+        });
+        html += '</div>';
+        document.getElementById('partModalBody').innerHTML = html;
+      });
+    };
+
+    window.createOrderFor = function (partId, wiId, bodegaId, bodegaName, price) {
       var qty = prompt('Cantidad a ordenar para "' + bodegaName + '":', '1');
       if (!qty) return;
       qty = parseInt(qty);
@@ -265,12 +307,22 @@
 
       var notes = prompt('Notas para la bodega (opcional):', '') || '';
 
+      var item = { quantity: qty, unit_price: price };
+      if (partId) {
+        item.part_id = partId;
+      } else if (wiId) {
+        item.wi_id = wiId;
+      } else {
+        alert('Error: se requiere part_id o wi_id');
+        return;
+      }
+
       // Create PO draft
       apiFetch('/orders', {
         method: 'POST',
         body: JSON.stringify({
           bodega_id: bodegaId,
-          items: [{ part_id: partId, quantity: qty, unit_price: price }],
+          items: [item],
           delivery_method: 'pickup',
           buyer_notes: notes,
         }),
@@ -482,6 +534,10 @@
                   r.updated + ' actualizados';
         if (r.skipped > 0) msg += ', ' + r.skipped + ' omitidos';
         msg += '</span>';
+        if (r.oem_count !== undefined || r.seller_count !== undefined) {
+          msg += '<div style="margin-top:var(--space-2);font-size:var(--text-caption);color:var(--color-text-muted);">' +
+                 (r.oem_count || 0) + ' catálogo OEM · ' + (r.seller_count || 0) + ' seller listings</div>';
+        }
         if (r.errors && r.errors.length) {
           msg += '<div style="margin-top:var(--space-2);color:var(--color-text-muted);font-size:var(--text-caption);">';
           r.errors.slice(0, 5).forEach(function (e) {
diff --git a/pos/templates/marketplace_external.html b/pos/templates/marketplace_external.html
new file mode 100644
index 0000000..561f1f8
--- /dev/null
+++ b/pos/templates/marketplace_external.html
@@ -0,0 +1,322 @@
+<!DOCTYPE html>
+<html lang="es" data-theme="industrial">
+<head>
+  <script>(function(){var t=localStorage.getItem("pos_theme")||"industrial";document.documentElement.setAttribute("data-theme",t);})()</script>
+  <meta charset="UTF-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>MercadoLibre — Nexus Autoparts POS</title>
+  <link rel="stylesheet" href="/pos/static/css/chat.css" />
+  <link rel="stylesheet" href="/pos/static/css/tokens.css" />
+  <link rel="stylesheet" href="/pos/static/css/common.css" />
+  <link rel="stylesheet" href="/pos/static/css/sidebar.css" />
+  <link rel="stylesheet" href="/pos/static/css/pos-glass.css" />
+  <link rel="stylesheet" href="/pos/static/css/inventory.css" />
+  <link rel="manifest" href="/pos/static/pwa/manifest.json" />
+  <meta name="theme-color" content="#F5A623" />
+  <style>
+    .meli-status { display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:20px;font-size:12px;font-weight:600; }
+    .meli-status--active { background:#d4edda;color:#155724; }
+    .meli-status--paused { background:#fff3cd;color:#856404; }
+    .meli-status--closed { background:#f8d7da;color:#721c24; }
+    .meli-status--pending { background:#e2e3e5;color:#383d41; }
+    .meli-card { background:var(--color-surface-1);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-4); }
+    .meli-grid { display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:var(--space-4); }
+    .meli-connect-btn { display:inline-flex;align-items:center;gap:8px;padding:10px 20px;background:#FFE600;color:#2D3277;border:none;border-radius:var(--radius-md);font-weight:700;cursor:pointer; }
+    .meli-connect-btn:hover { filter:brightness(0.95); }
+    .meli-config-row { display:flex;gap:var(--space-4);flex-wrap:wrap;margin-bottom:var(--space-4); }
+    .meli-config-row label { display:block;font-size:var(--text-caption);color:var(--color-text-muted);margin-bottom:4px; }
+    .meli-config-row input, .meli-config-row select { padding:8px 12px;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface-0);color:var(--color-text-primary); }
+  </style>
+</head>
+
+<body>
+
+  <!-- =========================================================================
+       THEME SWITCHER BAR
+       ========================================================================= -->
+
+  <header class="theme-bar" role="banner">
+    <div class="theme-bar__left">
+      <div class="theme-bar__store">
+        <span class="theme-bar__dot"></span>
+        Nexus Autoparts
+      </div>
+      <div class="theme-bar__sep"></div>
+      <span class="theme-bar__label">MercadoLibre — Integración</span>
+    </div>
+    <div class="theme-bar__right">
+      <span class="theme-bar__label">Tema:</span>
+      <button class="theme-btn theme-btn--industrial is-active" data-theme-target="industrial" onclick="setTheme('industrial')">
+        <span class="theme-btn__swatch"></span>
+        Industrial
+      </button>
+      <button class="theme-btn theme-btn--modern" data-theme-target="modern" onclick="setTheme('modern')">
+        <span class="theme-btn__swatch"></span>
+        Moderno
+      </button>
+    </div>
+  </header>
+
+  <!-- =========================================================================
+       APP SHELL
+       ========================================================================= -->
+
+  <div class="app-shell">
+
+    <!-- -----------------------------------------------------------------------
+         SIDEBAR NAVIGATION
+         ----------------------------------------------------------------------- -->
+
+    <aside class="sidebar" role="navigation" aria-label="Navegación principal">
+      <div class="sidebar__brand">
+        <div class="brand-logo">NA</div>
+        <div class="brand-name">
+          <span class="brand-name__primary">Nexus</span>
+          <span class="brand-name__sub">Autoparts POS</span>
+        </div>
+      </div>
+      <nav class="sidebar__nav">
+        <div class="nav-section-label">Principal</div>
+        <a class="nav-item" href="/pos/dashboard">
+          <svg class="nav-item__icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round">
+            <rect x="3" y="3" width="7" height="7"/><rect x="14" y="3" width="7" height="7"/>
+            <rect x="14" y="14" width="7" height="7"/><rect x="3" y="14" width="7" height="7"/>
+          </svg>
+          <span>Dashboard</span>
+        </a>
+        <a class="nav-item" href="/pos/sale">
+          <svg class="nav-item__icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round">
+            <rect x="2" y="3" width="20" height="14" rx="2"/><path d="M8 21h8M12 17v4"/>
+          </svg>
+          <span>POS</span>
+        </a>
+        <a class="nav-item" href="/pos/catalog">
+          <svg class="nav-item__icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round">
+            <path d="M4 6h16M4 10h16M4 14h16M4 18h16"/>
+          </svg>
+          <span>Catálogo</span>
+        </a>
+        <a class="nav-item" href="/pos/inventory">
+          <svg class="nav-item__icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round">
+            <path d="M21 16V8a2 2 0 0 0-1-1.73l-7-4a2 2 0 0 0-2 0l-7 4A2 2 0 0 0 3 8v8a2 2 0 0 0 1 1.73l7 4a2 2 0 0 0 2 0l7-4A2 2 0 0 0 21 16z"/>
+            <polyline points="3.27 6.96 12 12.01 20.73 6.96"/><line x1="12" y1="22.08" x2="12" y2="12"/>
+          </svg>
+          <span>Inventario</span>
+        </a>
+        <div class="nav-section-label">Gestión</div>
+        <a class="nav-item" href="/pos/customers">
+          <svg class="nav-item__icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round">
+            <path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2"/>
+            <circle cx="9" cy="7" r="4"/>
+            <path d="M23 21v-2a4 4 0 0 0-3-3.87M16 3.13a4 4 0 0 1 0 7.75"/>
+          </svg>
+          <span>Clientes</span>
+        </a>
+        <a class="nav-item" href="/pos/marketplace">
+          <svg class="nav-item__icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round">
+            <circle cx="9" cy="21" r="1"/><circle cx="20" cy="21" r="1"/>
+            <path d="M1 1h4l2.68 13.39a2 2 0 0 0 2 1.61h9.72a2 2 0 0 0 2-1.61L23 6H6"/>
+          </svg>
+          <span>Marketplace B2B</span>
+        </a>
+        <a class="nav-item is-active" href="/pos/marketplace-external" aria-current="page">
+          <svg class="nav-item__icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round">
+            <rect x="2" y="3" width="20" height="14" rx="2"/><path d="M8 21h8M12 17v4"/>
+          </svg>
+          <span>MercadoLibre</span>
+        </a>
+        <a class="nav-item" href="/pos/invoicing">
+          <svg class="nav-item__icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round">
+            <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/>
+            <polyline points="14 2 14 8 20 8"/>
+            <line x1="16" y1="13" x2="8" y2="13"/><line x1="16" y1="17" x2="8" y2="17"/>
+            <polyline points="10 9 9 9 8 9"/>
+          </svg>
+          <span>Facturación</span>
+        </a>
+        <a class="nav-item" href="/pos/config">
+          <svg class="nav-item__icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round">
+            <circle cx="12" cy="12" r="3"/>
+            <path d="M19.07 4.93a10 10 0 0 1 0 14.14M4.93 4.93a10 10 0 0 0 0 14.14"/>
+          </svg>
+          <span>Configuración</span>
+        </a>
+      </nav>
+      <div class="sidebar__footer">
+        <div class="sidebar__user-avatar" id="sidebarAvatar">U</div>
+        <div class="sidebar__user-info">
+          <div class="sidebar__user-name" id="sidebarName">Usuario</div>
+          <div class="sidebar__user-role" id="sidebarRole">—</div>
+        </div>
+      </div>
+    </aside>
+
+    <!-- -----------------------------------------------------------------------
+         MAIN CONTENT
+         ----------------------------------------------------------------------- -->
+
+    <main class="main" role="main">
+
+      <!-- Page Header -->
+      <div class="page-header">
+        <div class="page-header__title-group">
+          <span class="page-header__eyebrow">Marketplace</span>
+          <h1 class="page-header__title">MercadoLibre</h1>
+        </div>
+        <div class="page-header__actions">
+          <a class="btn btn--ghost" href="/pos/dashboard">
+            <svg viewBox="0 0 24 24"><path d="M3 9l9-7 9 7v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z"/><polyline points="9 22 9 12 15 12 15 22"/></svg>
+            Dashboard
+          </a>
+        </div>
+      </div>
+
+      <!-- Tab Bar -->
+      <div class="tab-bar">
+        <button class="tab-btn is-active" role="tab" aria-selected="true" aria-controls="panel-config" onclick="switchTab('config')">
+          Configuración
+        </button>
+        <button class="tab-btn" role="tab" aria-selected="false" aria-controls="panel-listings" onclick="switchTab('listings')">
+          Publicaciones
+        </button>
+        <button class="tab-btn" role="tab" aria-selected="false" aria-controls="panel-orders" onclick="switchTab('orders')">
+          Órdenes
+        </button>
+      </div>
+
+      <!-- Tab Panels -->
+      <div class="tab-panels" id="tab-panels">
+
+        <!-- ══════════ TAB: Configuración ══════════ -->
+        <div class="tab-panel is-active" id="panel-config" role="tabpanel">
+          <div class="meli-card" style="max-width:600px;">
+            <h3 style="margin:0 0 var(--space-4);font-family:var(--font-heading);">Conexión con MercadoLibre</h3>
+            <div id="configStatus">
+              <p>Cargando estado...</p>
+            </div>
+            <div id="configForm" style="display:none;margin-top:var(--space-4);">
+              <p style="margin-bottom:var(--space-3);font-size:var(--text-body-sm);color:var(--color-text-secondary);">
+                Para conectar, necesitas una <strong>aplicación de MercadoLibre</strong>.
+                Ve a <a href="https://developers.mercadolibre.com.mx" target="_blank">developers.mercadolibre.com.mx</a>
+                y crea una app. Luego pega los datos aquí:
+              </p>
+              <div class="meli-config-row">
+                <div>
+                  <label>Client ID</label>
+                  <input type="text" id="cfgClientId" placeholder="Tu App ID" style="width:200px;" />
+                </div>
+                <div>
+                  <label>Client Secret</label>
+                  <input type="password" id="cfgClientSecret" placeholder="Tu Secret Key" style="width:200px;" />
+                </div>
+              </div>
+              <div class="meli-config-row">
+                <div>
+                  <label>Categoría Default</label>
+                  <input type="text" id="cfgCategory" placeholder="MLM1747" style="width:150px;" />
+                </div>
+                <div>
+                  <label>Modo de Envío</label>
+                  <select id="cfgShipping">
+                    <option value="me2">MercadoEnvíos (me2)</option>
+                    <option value="custom">Propio (custom)</option>
+                  </select>
+                </div>
+              </div>
+              <button class="meli-connect-btn" onclick="startOAuth()">🔗 Conectar con MercadoLibre</button>
+            </div>
+            <div id="configConnected" style="display:none;margin-top:var(--space-4);">
+              <div style="display:flex;align-items:center;gap:12px;margin-bottom:var(--space-3);">
+                <div style="width:48px;height:48px;border-radius:50%;background:#FFE600;display:flex;align-items:center;justify-content:center;font-weight:800;color:#2D3277;">ML</div>
+                <div>
+                  <div style="font-weight:700;" id="connectedNickname">Usuario ML</div>
+                  <div style="font-size:var(--text-caption);color:var(--color-text-muted);" id="connectedSite">MLM</div>
+                </div>
+              </div>
+              <button class="btn btn--danger btn--sm" onclick="disconnectMeli()">Desconectar</button>
+            </div>
+          </div>
+        </div>
+
+        <!-- ══════════ TAB: Publicaciones ══════════ -->
+        <div class="tab-panel" id="panel-listings" role="tabpanel">
+          <div class="toolbar">
+            <div class="search-box">
+              <svg viewBox="0 0 24 24" stroke-linecap="round"><circle cx="11" cy="11" r="8"/><line x1="21" y1="21" x2="16.65" y2="16.65"/></svg>
+              <input type="text" id="listingSearch" placeholder="Buscar publicación..." oninput="filterListings()" />
+            </div>
+            <select class="select-filter" id="listingStatusFilter" onchange="filterListings()">
+              <option value="">Todos los estados</option>
+              <option value="active">Activas</option>
+              <option value="paused">Pausadas</option>
+              <option value="closed">Cerradas</option>
+            </select>
+            <div class="toolbar__spacer"></div>
+            <button class="btn btn--primary" onclick="loadListings()">🔄 Actualizar</button>
+          </div>
+          <div id="listingsContainer" class="meli-grid"></div>
+          <div id="listingsPagination" class="table-footer" style="margin-top:var(--space-4);"></div>
+        </div>
+
+        <!-- ══════════ TAB: Órdenes ══════════ -->
+        <div class="tab-panel" id="panel-orders" role="tabpanel">
+          <div class="toolbar">
+            <div class="search-box">
+              <svg viewBox="0 0 24 24" stroke-linecap="round"><circle cx="11" cy="11" r="8"/><line x1="21" y1="21" x2="16.65" y2="16.65"/></svg>
+              <input type="text" id="orderSearch" placeholder="Buscar orden..." oninput="filterOrders()" />
+            </div>
+            <select class="select-filter" id="orderStatusFilter" onchange="filterOrders()">
+              <option value="">Todos los estados</option>
+              <option value="pending">Pendientes</option>
+              <option value="confirmed">Confirmadas</option>
+              <option value="packed">Empacadas</option>
+              <option value="shipped">Enviadas</option>
+              <option value="delivered">Entregadas</option>
+              <option value="cancelled">Canceladas</option>
+            </select>
+            <div class="toolbar__spacer"></div>
+            <button class="btn btn--primary" onclick="loadOrders()">🔄 Actualizar</button>
+          </div>
+          <div class="table-wrapper">
+            <table class="data-table">
+              <thead>
+                <tr>
+                  <th>Orden ML</th>
+                  <th>Comprador</th>
+                  <th style="text-align:right">Total</th>
+                  <th>Estado Nexus</th>
+                  <th>Fecha</th>
+                  <th>Acciones</th>
+                </tr>
+              </thead>
+              <tbody id="ordersTableBody"></tbody>
+            </table>
+            <div id="ordersPagination" class="table-footer"></div>
+          </div>
+        </div>
+
+      </div><!-- /tab-panels -->
+
+    </main>
+
+  </div><!-- /app-shell -->
+
+  <!-- ══════════ Order Detail Modal ══════════ -->
+  <div class="inv-modal-overlay" id="orderModal">
+    <div class="inv-modal inv-modal--wide">
+      <div class="inv-modal__header">
+        <h3>Detalle de Orden ML</h3>
+        <button class="inv-modal__close" onclick="closeModal('orderModal')">&times;</button>
+      </div>
+      <div class="inv-modal__body" id="orderModalBody">cargando...</div>
+      <div class="inv-modal__footer" id="orderModalFooter"></div>
+    </div>
+  </div>
+
+  <script src="/pos/static/js/i18n.js" defer></script>
+  <script src="/pos/static/js/app-init.js" defer></script>
+  <script src="/pos/static/js/sidebar.js" defer></script>
+  <script src="/pos/static/js/marketplace_external.js?v=3" defer></script>
+  <script>if('serviceWorker' in navigator){navigator.serviceWorker.register('/pos/sw.js',{scope:'/pos/'});}</script>
+</body>
+</html>
diff --git a/pos/templates/pos.html b/pos/templates/pos.html
index 2e97bcf..3f689c3 100644
--- a/pos/templates/pos.html
+++ b/pos/templates/pos.html
@@ -32,6 +32,10 @@
       <span id="statusClock"></span>
     </div>
     <div class="status-bar__right">
+      <a href="/pos/dashboard" class="btn btn--ghost btn--sm" id="backToSystemBtn" style="margin-right:8px;display:none;">
+        <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M3 9l9-7 9 7v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z"/><polyline points="9 22 9 12 15 12 15 22"/></svg>
+        Sistema
+      </a>
       <div class="status-bar__user" aria-label="Usuario activo">
         <div class="status-bar__user-avatar" aria-hidden="true">--</div>
         <span id="employeeName">Empleado</span>
@@ -203,7 +207,7 @@
           <button class="btn-secondary-action" onclick="POS.saveQuotation()" title="Cotizacion (F4)">Cotizar</button>
           <button class="btn-secondary-action" onclick="POS.showLastSale()" title="Ultima venta (F5)">Ult.Venta</button>
           <button class="btn-secondary-action" onclick="POS.showCutZModal()" title="Corte Z - Cerrar caja">Corte Z</button>
-          <button class="btn-secondary-action danger" id="btnCancelSale" title="Cancelar (Esc)">Cancelar</button>
+          <button class="btn-secondary-action danger" id="btnCancelSale" onclick="POS.openCancelModal()" title="Cancelar (Esc)">Cancelar</button>
         </div>
       </div>
     </aside>
@@ -233,14 +237,14 @@
       <span class="fkey-key">F6</span><span class="fkey-label">Cajon</span>
     </div>
     <div class="fkey-sep"></div>
-    <div class="fkey" title="Cantidad +/-">
+    <div class="fkey" onclick="POS.changeQuantity()" title="Cantidad +/-">
       <span class="fkey-key">+/-</span><span class="fkey-label">Cantidad</span>
     </div>
-    <div class="fkey" title="Descuento">
+    <div class="fkey" onclick="POS.applyDiscount()" title="Descuento">
       <span class="fkey-key">*</span><span class="fkey-label">Descuento</span>
     </div>
     <div class="fkey-sep"></div>
-    <div class="fkey" id="fkeyEsc" title="Cancelar">
+    <div class="fkey" id="fkeyEsc" onclick="POS.openCancelModal()" title="Cancelar">
       <span class="fkey-key">Esc</span><span class="fkey-label">Cancelar</span>
     </div>
   </div>
@@ -563,7 +567,7 @@
   <script src="/pos/static/js/app-init.js" defer></script>
   <script src="/pos/static/js/push.js" defer></script>
   <script src="/pos/static/js/printer.js" defer></script>
-  <script src="/pos/static/js/pos.js?v=4" defer></script>
+  <script src="/pos/static/js/pos.js?v=5" defer></script>
 
   <script>
     // Cancel sale button wiring
@@ -577,11 +581,7 @@
       closeCancelModal();
       // Clear cart via POS module
       if (typeof POS !== 'undefined') {
-        // Clear each item
-        const tbody = document.getElementById('cartBody');
-        while (tbody && tbody.firstChild) {
-          POS.removeFromCart(0);
-        }
+        POS.clearCart();
         POS.clearCustomer();
       }
     });
@@ -614,6 +614,20 @@
     }
     updateClock();
     setInterval(updateClock, 30000);
+
+    // Show "Back to System" button when NOT in kiosk mode
+    (function checkKiosk() {
+      var btn = document.getElementById('backToSystemBtn');
+      if (!btn) return;
+      function showIfNotKiosk() {
+        try {
+          var isKiosk = window.isKioskEnabled && window.isKioskEnabled();
+          btn.style.display = isKiosk ? 'none' : 'inline-flex';
+        } catch (e) { btn.style.display = 'inline-flex'; }
+      }
+      showIfNotKiosk();
+      setInterval(showIfNotKiosk, 2000);
+    })();
   </script>
 
   <script src="/pos/static/js/chat.js" defer></script>
diff --git a/pos/templates/quotations.html b/pos/templates/quotations.html
index a831058..9ed0795 100644
--- a/pos/templates/quotations.html
+++ b/pos/templates/quotations.html
@@ -65,7 +65,9 @@
             html += '<td onclick="openQuote(' + q.id + ')" style="cursor:pointer;font-family:var(--font-mono);font-weight:700;">$' + fmt(q.total) + '</td>';
             html += '<td onclick="openQuote(' + q.id + ')" style="cursor:pointer;">' + statusBadge + '</td>';
             html += '<td onclick="openQuote(' + q.id + ')" style="cursor:pointer;color:var(--color-text-muted);">' + dateStr + '</td>';
-            html += '<td><button onclick="deleteQuote(' + q.id + ', event)" style="background:none;border:none;color:var(--color-text-muted);cursor:pointer;font-size:16px;padding:4px 8px;border-radius:4px;" onmouseover="this.style.color=\'#F85149\';this.style.background=\'rgba(248,81,73,0.1)\'" onmouseout="this.style.color=\'var(--color-text-muted)\';this.style.background=\'none\'">🗑️</button></td>';
+            html += '<td><button onclick="deleteQuote(' + q.id + ', event)" style="background:var(--color-bg-overlay);border:1.5px solid var(--color-border);color:var(--color-text-muted);cursor:pointer;font-size:13px;padding:6px 10px;border-radius:var(--radius-md);display:inline-flex;align-items:center;gap:4px;transition:var(--transition-fast);" onmouseover="this.style.color=\'var(--color-error)\';this.style.borderColor=\'var(--color-error)\';this.style.background=\'rgba(248,81,73,0.08)\'" onmouseout="this.style.color=\'var(--color-text-muted)\';this.style.borderColor=\'var(--color-border)\';this.style.background=\'var(--color-bg-overlay)\'">';
+            html += '<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="3 6 5 6 21 6"/><path d="M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2"/></svg>';
+            html += 'Eliminar</button></td>';
             html += '</tr>';
           });
           html += '</tbody></table>';
@@ -114,15 +116,33 @@
           html += '<div style="font-size:var(--text-h5);font-weight:700;color:var(--color-text-accent);">Total: $' + fmt(q.total) + '</div>';
           html += '</div>';
 
-          html += '<div style="margin-top:var(--space-5);display:flex;gap:var(--space-3);justify-content:flex-end;flex-wrap:wrap;">';
+          html += '<div style="margin-top:var(--space-5);">';
+          // Primary actions
           if (q.status === 'active') {
-            html += '<button class="btn btn--ghost" onclick="editQuote(' + q.id + ')" style="color:#4f46e5;">Editar</button>';
-            html += '<button class="btn btn--ghost" onclick="convertQuote(' + q.id + ')" style="color:#059669;">Convertir a venta</button>';
-            html += '<button class="btn btn--ghost" onclick="shareQuote(' + q.id + ')">Compartir link</button>';
+            html += '<div style="display:flex;gap:var(--space-3);flex-wrap:wrap;margin-bottom:var(--space-3);">';
+            html += '<button class="btn btn--primary" onclick="convertQuote(' + q.id + ')" style="padding:10px 20px;font-size:var(--text-body);display:inline-flex;align-items:center;gap:8px;">';
+            html += '<svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="9" cy="21" r="1"/><circle cx="20" cy="21" r="1"/><path d="M1 1h4l2.68 13.39a2 2 0 0 0 2 1.61h9.72a2 2 0 0 0 2-1.61L23 6H6"/></svg>';
+            html += 'Convertir a Venta</button>';
+            html += '<button class="btn btn--secondary" onclick="editQuote(' + q.id + ')" style="padding:10px 20px;font-size:var(--text-body);display:inline-flex;align-items:center;gap:8px;">';
+            html += '<svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7"/><path d="M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z"/></svg>';
+            html += 'Editar</button>';
+            html += '<button class="btn btn--ghost" onclick="shareQuote(' + q.id + ')" style="padding:10px 20px;font-size:var(--text-body);display:inline-flex;align-items:center;gap:8px;border:1.5px solid var(--color-border);">';
+            html += '<svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="18" cy="5" r="3"/><circle cx="6" cy="12" r="3"/><circle cx="18" cy="19" r="3"/><line x1="8.59" y1="13.51" x2="15.42" y2="17.49"/><line x1="15.41" y1="6.51" x2="8.59" y2="10.49"/></svg>';
+            html += 'Compartir</button>';
+            html += '</div>';
           }
-          html += '<button class="btn btn--ghost" onclick="deleteQuote(' + q.id + ')" style="color:#F85149;">Eliminar</button>';
-          html += '<button class="btn btn--ghost" onclick="exportVisibleTableCSV(\'cotizacion_' + q.id + '\')">Exportar CSV</button>';
-          html += '<button class="btn btn--ghost" onclick="window.print()">Imprimir</button>';
+          // Secondary actions
+          html += '<div style="display:flex;gap:var(--space-3);flex-wrap:wrap;justify-content:flex-end;">';
+          html += '<button class="btn btn--ghost" onclick="window.print()" style="padding:8px 16px;font-size:var(--text-body-sm);display:inline-flex;align-items:center;gap:6px;">';
+          html += '<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="6 9 6 2 18 2 18 9"/><path d="M6 18H4a2 2 0 0 1-2-2v-5a2 2 0 0 1 2-2h16a2 2 0 0 1 2 2v5a2 2 0 0 1-2 2h-2"/><rect x="6" y="14" width="12" height="8"/></svg>';
+          html += 'Imprimir</button>';
+          html += '<button class="btn btn--ghost" onclick="exportVisibleTableCSV(\'cotizacion_' + q.id + '\')" style="padding:8px 16px;font-size:var(--text-body-sm);display:inline-flex;align-items:center;gap:6px;">';
+          html += '<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/><polyline points="7 10 12 15 17 10"/><line x1="12" y1="15" x2="12" y2="3"/></svg>';
+          html += 'Exportar CSV</button>';
+          html += '<button class="btn btn--ghost" onclick="deleteQuote(' + q.id + ')" style="padding:8px 16px;font-size:var(--text-body-sm);display:inline-flex;align-items:center;gap:6px;color:var(--color-error);">';
+          html += '<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="3 6 5 6 21 6"/><path d="M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2"/></svg>';
+          html += 'Eliminar</button>';
+          html += '</div>';
           html += '</div>';
 
           document.getElementById('quoteDetail').innerHTML = html;
@@ -142,69 +162,83 @@
           } else {
             alert('Error: ' + (d.error || 'desconocido'));
           }
-        });
+        })
+        .catch(function(err) { alert('Error de red al eliminar: ' + err.message); });
     };
 
     window.editQuote = function(id) {
-      fetch(API + '/quotations/' + id, { headers: headers() })
-        .then(function(r) { return r.json(); })
-        .then(function(q) {
-          if (!q.items) { alert('Error cargando cotización'); return; }
-          var cartItems = q.items.map(function(it) {
-            return {
-              inventory_id: it.inventory_id,
-              part_number: it.part_number,
-              name: it.name,
-              quantity: it.quantity,
-              unit_price: it.unit_price,
-              discount_pct: it.discount_pct,
-              tax_rate: it.tax_rate
-            };
-          });
-          localStorage.setItem('pos_edit_quote_id', id);
-          localStorage.setItem('pos_edit_quote_customer_id', q.customer_id || '');
-          localStorage.setItem('pos_edit_quote_notes', q.notes || '');
-          localStorage.setItem('pos_cart', JSON.stringify(cartItems));
-          window.location.href = '/pos';
-        });
+      try {
+        fetch(API + '/quotations/' + id, { headers: headers() })
+          .then(function(r) { return r.json(); })
+          .then(function(q) {
+            if (!q.items) { alert('Error cargando cotización'); return; }
+            var cartItems = q.items.map(function(it) {
+              return {
+                inventory_id: it.inventory_id,
+                part_number: it.part_number,
+                name: it.name,
+                quantity: it.quantity,
+                unit_price: it.unit_price,
+                discount_pct: it.discount_pct,
+                tax_rate: it.tax_rate
+              };
+            });
+            localStorage.setItem('pos_edit_quote_id', id);
+            localStorage.setItem('pos_edit_quote_customer_id', q.customer_id || '');
+            localStorage.setItem('pos_edit_quote_notes', q.notes || '');
+            localStorage.setItem('pos_cart', JSON.stringify(cartItems));
+            window.location.href = '/pos/sale';
+          })
+          .catch(function(err) { alert('Error al cargar para editar: ' + err.message); });
+      } catch (e) { alert('Excepcion en editQuote: ' + e.message); }
     };
 
     window.convertQuote = function(id) {
-      fetch(API + '/quotations/' + id, { headers: headers() })
-        .then(function(r) { return r.json(); })
-        .then(function(q) {
-          if (!q.items) { alert('Error cargando cotización'); return; }
-          var cartItems = q.items.map(function(it) {
-            return {
-              inventory_id: it.inventory_id,
-              part_number: it.part_number,
-              name: it.name,
-              quantity: it.quantity,
-              unit_price: it.unit_price,
-              discount_pct: it.discount_pct,
-              tax_rate: it.tax_rate
-            };
-          });
-          localStorage.setItem('pos_convert_quote_id', id);
-          localStorage.setItem('pos_cart', JSON.stringify(cartItems));
-          window.location.href = '/pos';
-        });
+      try {
+        fetch(API + '/quotations/' + id, { headers: headers() })
+          .then(function(r) { return r.json(); })
+          .then(function(q) {
+            if (!q.items) { alert('Error cargando cotización'); return; }
+            var cartItems = q.items.map(function(it) {
+              return {
+                inventory_id: it.inventory_id,
+                part_number: it.part_number,
+                name: it.name,
+                quantity: it.quantity,
+                unit_price: it.unit_price,
+                discount_pct: it.discount_pct,
+                tax_rate: it.tax_rate
+              };
+            });
+            localStorage.setItem('pos_convert_quote_id', id);
+            localStorage.setItem('pos_cart', JSON.stringify(cartItems));
+            window.location.href = '/pos/sale';
+          })
+          .catch(function(err) { alert('Error al cargar para convertir: ' + err.message); });
+      } catch (e) { alert('Excepcion en convertQuote: ' + e.message); }
     };
 
     window.shareQuote = function(id) {
-      fetch(API + '/quotations/' + id + '/share', { method: 'POST', headers: headers() })
-        .then(function(r) { return r.json(); })
-        .then(function(d) {
-          if (d.url) {
-            navigator.clipboard.writeText(d.url).then(function() {
-              alert('Link copiado al portapapeles:\n' + d.url);
-            }).catch(function() {
-              prompt('Copia este link:', d.url);
-            });
-          } else {
-            alert('Error: ' + (d.error || 'desconocido'));
-          }
-        });
+      try {
+        fetch(API + '/quotations/' + id + '/share', { method: 'POST', headers: headers() })
+          .then(function(r) { return r.json(); })
+          .then(function(d) {
+            if (d.url) {
+              if (navigator.clipboard && navigator.clipboard.writeText) {
+                navigator.clipboard.writeText(d.url).then(function() {
+                  alert('Link copiado al portapapeles:\n' + d.url);
+                }).catch(function() {
+                  prompt('Copia este link:', d.url);
+                });
+              } else {
+                prompt('Copia este link:', d.url);
+              }
+            } else {
+              alert('Error del servidor: ' + (d.error || 'desconocido'));
+            }
+          })
+          .catch(function(err) { alert('Error de red al compartir: ' + err.message); });
+      } catch (e) { alert('Excepcion en shareQuote: ' + e.message); }
     };
 
     // Close modal on outside click
diff --git a/pos/templates/whatsapp.html b/pos/templates/whatsapp.html
index 8173a2d..32c4a78 100644
--- a/pos/templates/whatsapp.html
+++ b/pos/templates/whatsapp.html
@@ -131,7 +131,7 @@ function posLogout(){localStorage.removeItem('pos_token');window.location.href='
 
 <!-- Sidebar -->
 <script src="/pos/static/js/i18n.js" defer></script>
-<script src="/pos/static/js/whatsapp2.js" defer></script>
+<script src="/pos/static/js/whatsapp2.js?v=5" defer></script>
 <script src="/pos/static/js/pos-utils.js" defer></script>
   <script src="/pos/static/js/sidebar.js" defer></script>
 
diff --git a/pos/whatsapp-bridge-server.js b/pos/whatsapp-bridge-server.js
index 6fc34d4..17dbac2 100644
--- a/pos/whatsapp-bridge-server.js
+++ b/pos/whatsapp-bridge-server.js
@@ -1,7 +1,9 @@
-const { default: makeWASocket, useMultiFileAuthState, DisconnectReason, fetchLatestBaileysVersion } = require('@whiskeysockets/baileys');
+const { default: makeWASocket, useMultiFileAuthState, DisconnectReason, fetchLatestBaileysVersion, downloadMediaMessage } = require('@whiskeysockets/baileys');
 const express = require('express');
 const QRCode = require('qrcode');
 const pino = require('pino');
+const fs = require('fs');
+const path = require('path');
 
 const app = express();
 app.use(express.json());
@@ -17,15 +19,117 @@ const AUTH_DIR = process.env.AUTH_DIR || '/app/auth';
 let sock = null;
 let qrCode = null;
 let connectionState = 'disconnected';
+let retry440Count = 0;
+let lastConnectAttempt = 0;
 const logger = pino({ level: process.env.LOG_LEVEL || 'warn' });
 
+// Queue for outgoing messages when disconnected
+const sendQueue = [];
+let queueTimer = null;
+let connectWatchdog = null;
+let staleWatchdog = null;
+const WATCHDOG_MS = 90000;
+const STALE_MS = 90000;
+let lastActivity = Date.now();
+
+function updateActivity() {
+    lastActivity = Date.now();
+}
+
+function clearAuthState() {
+    try {
+        if (fs.existsSync(AUTH_DIR)) {
+            fs.readdirSync(AUTH_DIR).forEach(f => {
+                try { fs.unlinkSync(path.join(AUTH_DIR, f)); } catch (e) {}
+            });
+        }
+        console.log(`[Tenant ${TENANT_ID}] Auth state cleared`);
+    } catch (e) {
+        console.error(`[Tenant ${TENANT_ID}] Failed to clear auth:`, e.message);
+    }
+}
+
+function flushSendQueue() {
+    if (!sock || connectionState !== 'open') return;
+    while (sendQueue.length > 0) {
+        const item = sendQueue.shift();
+        try {
+            sock.sendMessage(item.jid, { text: item.message });
+            console.log(`[Tenant ${TENANT_ID}] Flushed queued message to ${item.jid}`);
+        } catch (e) {
+            console.error(`[Tenant ${TENANT_ID}] Failed to flush queued message:`, e.message);
+            sendQueue.unshift(item);
+            break;
+        }
+    }
+}
+
+function clearWatchdog() {
+    if (connectWatchdog) { clearTimeout(connectWatchdog); connectWatchdog = null; }
+    if (staleWatchdog) { clearInterval(staleWatchdog); staleWatchdog = null; }
+}
+
+function scheduleStaleWatchdog() {
+    if (staleWatchdog) clearInterval(staleWatchdog);
+    staleWatchdog = setInterval(() => {
+        if (connectionState === 'open' && (Date.now() - lastActivity > STALE_MS)) {
+            console.log(`[Tenant ${TENANT_ID}] Stale watchdog: no activity for ${STALE_MS/1000}s while open, forcing reconnect`);
+            try { sock?.ws?.close(); } catch (e) {}
+            sock = null;
+            connectionState = 'disconnected';
+            setTimeout(connectWhatsApp, 30000);
+        }
+    }, 30000);
+}
+
+function scheduleWatchdog() {
+    clearWatchdog();
+    connectWatchdog = setTimeout(() => {
+        if (connectionState !== 'open') {
+            console.log(`[Tenant ${TENANT_ID}] Watchdog: connection not stable after ${WATCHDOG_MS/1000}s, forcing reconnect`);
+            try { sock?.ws?.close(); } catch (e) {}
+            sock = null;
+            connectionState = 'disconnected';
+            setTimeout(connectWhatsApp, 30000);
+        }
+    }, WATCHDOG_MS);
+}
+
 async function connectWhatsApp() {
+    // Rate limit: max 1 attempt per 30 seconds to avoid WhatsApp throttling
+    const now = Date.now();
+    if (now - lastConnectAttempt < 30000) {
+        const wait = 30000 - (now - lastConnectAttempt);
+        console.log(`[Tenant ${TENANT_ID}] Rate limiting: waiting ${wait/1000}s before next attempt`);
+        setTimeout(connectWhatsApp, wait);
+        return;
+    }
+    lastConnectAttempt = now;
+
+    clearWatchdog();
     const { state, saveCreds } = await useMultiFileAuthState(AUTH_DIR);
     const { version } = await fetchLatestBaileysVersion();
     console.log(`[Tenant ${TENANT_ID}] Connecting with Baileys v` + version.join('.'));
     connectionState = 'connecting';
+    scheduleWatchdog();
 
-    sock = makeWASocket({ version, auth: state, logger, printQRInTerminal: true, browser: ['Nexus POS', 'Chrome', '120.0'] });
+    sock = makeWASocket({
+        version,
+        auth: state,
+        logger,
+        // Use a generic Ubuntu + Chrome fingerprint — less suspicious than raw Linux
+        browser: ['Ubuntu', 'Chrome', '120.0.0.0'],
+        defaultQueryTimeoutMs: 60000,
+        keepAliveIntervalMs: 15000,
+        markOnlineOnConnect: false,
+        syncFullHistory: false,
+        shouldSyncHistoryMessage: () => false,
+        shouldIgnoreJid: (jid) => false,
+        retryRequestDelayMs: 250,
+        maxMsgRetryCount: 2,
+        connectTimeoutMs: 60000,
+        emitOwnEvents: false,
+    });
     sock.ev.on('creds.update', saveCreds);
 
     sock.ev.on('connection.update', async (update) => {
@@ -36,43 +140,248 @@ async function connectWhatsApp() {
             console.log(`[Tenant ${TENANT_ID}] QR code generated!`);
         }
         if (connection === 'close') {
+            clearWatchdog();
             connectionState = 'disconnected';
             qrCode = null;
-            const reason = lastDisconnect?.error?.output?.statusCode;
-            if (reason !== DisconnectReason.loggedOut) { setTimeout(connectWhatsApp, 5000); }
+            const statusCode = lastDisconnect?.error?.output?.statusCode;
+            // Baileys wraps some errors differently; try both paths
+            const reason = statusCode || lastDisconnect?.error?.statusCode;
+            console.log(`[Tenant ${TENANT_ID}] Disconnected, reason:`, reason);
+
+            if (reason === DisconnectReason.loggedOut) {
+                console.log(`[Tenant ${TENANT_ID}] Logged out — clearing auth`);
+                clearAuthState();
+                sock = null;
+                retry440Count = 0;
+                return;
+            }
+
+            if (reason === 440) {
+                // 440 = conflict/replaced. The session data is permanently invalid.
+                // Clean auth immediately and wait 5 min so WhatsApp forgets the old session.
+                console.log(`[Tenant ${TENANT_ID}] 440 Session replaced — clearing auth, waiting 5 min`);
+                clearAuthState();
+                sock = null;
+                retry440Count++;
+                const delay = retry440Count >= 3 ? 600000 : 300000; // 10 min after 3 failures, else 5 min
+                setTimeout(connectWhatsApp, delay);
+                return;
+            }
+
+            if (reason === 515) {
+                // 515 = stream error, often precedes 440. Treat same as 440.
+                console.log(`[Tenant ${TENANT_ID}] 515 Stream error — clearing auth, waiting 5 min`);
+                clearAuthState();
+                sock = null;
+                setTimeout(connectWhatsApp, 300000);
+                return;
+            }
+
+            if (reason === 428) {
+                console.log(`[Tenant ${TENANT_ID}] 428 Server terminated — waiting 60s`);
+                sock = null;
+                setTimeout(connectWhatsApp, 60000);
+                return;
+            }
+
+            if (reason === 408) {
+                // 408 during init queries usually means the server is overloaded
+                // or our auth is partially invalid. Clear auth if this happens repeatedly.
+                console.log(`[Tenant ${TENANT_ID}] 408 Timeout — waiting 60s`);
+                sock = null;
+                retry440Count++;
+                if (retry440Count >= 5) {
+                    console.log(`[Tenant ${TENANT_ID}] Too many timeouts — clearing auth for fresh QR`);
+                    clearAuthState();
+                    retry440Count = 0;
+                    setTimeout(connectWhatsApp, 300000);
+                    return;
+                }
+                setTimeout(connectWhatsApp, 60000);
+                return;
+            }
+
+            // Any other error — wait 30s and retry
+            console.log(`[Tenant ${TENANT_ID}] Reconnecting in 30s... (reason: ${reason})`);
+            sock = null;
+            setTimeout(connectWhatsApp, 30000);
+        }
+
+        if (connection === 'open') {
+            clearWatchdog();
+            connectionState = 'open';
+            qrCode = null;
+            retry440Count = 0;
+            updateActivity();
+            scheduleStaleWatchdog();
+            console.log(`[Tenant ${TENANT_ID}] Connected!`);
+            flushSendQueue();
         }
-        if (connection === 'open') { connectionState = 'open'; qrCode = null; console.log(`[Tenant ${TENANT_ID}] Connected!`); }
     });
 
     sock.ev.on('messages.upsert', async ({ messages }) => {
         for (const msg of messages) {
             if (msg.key.fromMe) continue;
             const phone = msg.key.remoteJid.replace('@s.whatsapp.net', '');
-            const text = msg.message?.conversation || msg.message?.extendedTextMessage?.text || '';
-            console.log(`[Tenant ${TENANT_ID}] From ${phone}: ${text}`);
+            const message = msg.message || {};
+            
+            let media_kind = 'text';
+            let media_base64 = null;
+            let media_mimetype = null;
+            let media_caption = null;
+            let media_ptt = false;
+            let latitude = null;
+            let longitude = null;
+            let text = '';
+
+            if (message.conversation) {
+                text = message.conversation;
+            } else if (message.extendedTextMessage) {
+                text = message.extendedTextMessage.text || '';
+            } else if (message.imageMessage) {
+                media_kind = 'image';
+                media_mimetype = message.imageMessage.mimetype;
+                media_caption = message.imageMessage.caption || '';
+                text = media_caption;
+            } else if (message.videoMessage) {
+                media_kind = 'video';
+                media_mimetype = message.videoMessage.mimetype;
+                media_caption = message.videoMessage.caption || '';
+                text = media_caption;
+            } else if (message.audioMessage) {
+                media_kind = 'audio';
+                media_mimetype = message.audioMessage.mimetype;
+                media_ptt = message.audioMessage.ptt || false;
+            } else if (message.locationMessage) {
+                media_kind = 'location';
+                latitude = message.locationMessage.degreesLatitude;
+                longitude = message.locationMessage.degreesLongitude;
+                text = `Ubicación: ${latitude}, ${longitude}`;
+            }
+
+            if (['image', 'video', 'audio'].includes(media_kind)) {
+                try {
+                    const buffer = await downloadMediaMessage(msg, 'buffer', {}, { logger: pino({ level: 'silent' }) });
+                    if (buffer) media_base64 = buffer.toString('base64');
+                } catch (e) {
+                    console.log(`[Tenant ${TENANT_ID}] Media download failed:`, e.message);
+                }
+            }
+
+            updateActivity();
+            console.log(`[Tenant ${TENANT_ID}] From ${phone}: [${media_kind}] ${text.substring(0, 80)}`);
             try {
-                await fetch(WEBHOOK_URL, { method: 'POST', headers: { 'Content-Type': 'application/json' },
-                    body: JSON.stringify({ event: 'messages.upsert', data: { key: msg.key, message: msg.message, messageTimestamp: msg.messageTimestamp } }) });
-            } catch (e) { console.log(`[Tenant ${TENANT_ID}] Webhook failed:`, e.message); }
+                const controller = new AbortController();
+                const timeoutId = setTimeout(() => controller.abort(), 30000);
+                const resp = await fetch(WEBHOOK_URL, {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' },
+                    body: JSON.stringify({
+                        event: 'messages.upsert',
+                        data: {
+                            key: msg.key,
+                            message: msg.message,
+                            messageTimestamp: msg.messageTimestamp,
+                            media_kind,
+                            media_base64,
+                            media_mimetype,
+                            media_caption,
+                            media_ptt,
+                            latitude,
+                            longitude,
+                            push_name: msg.pushName || ''
+                        }
+                    }),
+                    signal: controller.signal
+                });
+                clearTimeout(timeoutId);
+                if (resp.ok) {
+                    console.log(`[Tenant ${TENANT_ID}] Webhook delivered OK (${resp.status})`);
+                } else {
+                    console.log(`[Tenant ${TENANT_ID}] Webhook returned ${resp.status}`);
+                }
+            } catch (e) {
+                console.log(`[Tenant ${TENANT_ID}] Webhook failed:`, e.message);
+            }
         }
     });
 }
 
-app.get('/', (req, res) => res.json({ status: 'ok', service: 'Nexus WhatsApp Bridge', tenant: TENANT_ID, state: connectionState }));
+app.get('/', (req, res) => res.json({ status: 'ok', service: 'Nexus WhatsApp Bridge', tenant: TENANT_ID, state: connectionState, queued: sendQueue.length }));
 app.get('/status', (req, res) => res.json({ state: connectionState, hasQr: !!qrCode }));
 app.get('/qr', (req, res) => {
     if (connectionState === 'open') return res.json({ state: 'open', message: 'Already connected' });
     if (!qrCode) return res.json({ state: connectionState, qr: null, message: 'QR not ready' });
     res.json({ state: 'qr', qr: qrCode });
 });
-app.post('/connect', async (req, res) => { if (!sock) connectWhatsApp(); res.json({ state: connectionState }); });
-app.post('/send', async (req, res) => {
-    if (connectionState !== 'open') return res.status(400).json({ error: 'Not connected' });
-    const { phone, message } = req.body;
-    const jid = phone.includes('@') ? phone : phone + '@s.whatsapp.net';
-    try { const r = await sock.sendMessage(jid, { text: message }); res.json({ success: true, id: r.key.id }); }
-    catch (e) { res.status(500).json({ error: e.message }); }
+app.post('/connect', async (req, res) => {
+    if (sock) {
+        try { await sock.logout(); } catch (e) {}
+        sock = null;
+    }
+    retry440Count = 0;
+    clearAuthState();
+    qrCode = null;
+    connectionState = 'connecting';
+    connectWhatsApp();
+    res.json({ state: connectionState });
 });
-app.post('/logout', async (req, res) => { if (sock) { await sock.logout(); sock = null; } qrCode = null; connectionState = 'disconnected'; res.json({ state: 'disconnected' }); });
+app.post('/send', async (req, res) => {
+    const { phone, message } = req.body;
+    if (!phone || !message) {
+        return res.status(400).json({ error: 'phone and message required' });
+    }
+    const jid = phone.includes('@') ? phone : phone + '@s.whatsapp.net';
 
-app.listen(PORT, () => { console.log(`[Tenant ${TENANT_ID}] WhatsApp Bridge on port ${PORT}`); connectWhatsApp(); });
+    if (connectionState !== 'open' || !sock) {
+        sendQueue.push({ jid, message });
+        console.log(`[Tenant ${TENANT_ID}] Message queued for ${jid} (state: ${connectionState}, queue size: ${sendQueue.length})`);
+        return res.status(202).json({ queued: true, state: connectionState });
+    }
+
+    try {
+        const r = await sock.sendMessage(jid, { text: message });
+        res.json({ success: true, id: r.key.id });
+    } catch (e) {
+        sendQueue.push({ jid, message });
+        console.log(`[Tenant ${TENANT_ID}] Send failed, queued for retry:`, e.message);
+        res.status(202).json({ queued: true, error: e.message });
+    }
+});
+app.post('/send-image', async (req, res) => {
+    const { phone, caption, base64 } = req.body;
+    if (!phone || !base64) {
+        return res.status(400).json({ error: 'phone and base64 required' });
+    }
+    const jid = phone.includes('@') ? phone : phone + '@s.whatsapp.net';
+
+    if (connectionState !== 'open' || !sock) {
+        return res.status(400).json({ error: 'Not connected' });
+    }
+
+    try {
+        const buffer = Buffer.from(base64, 'base64');
+        const r = await sock.sendMessage(jid, {
+            image: buffer,
+            caption: caption || ''
+        });
+        res.json({ success: true, id: r.key.id });
+    } catch (e) {
+        console.log(`[Tenant ${TENANT_ID}] Send image failed:`, e.message);
+        res.status(500).json({ error: e.message });
+    }
+});
+
+app.post('/logout', async (req, res) => {
+    if (sock) { await sock.logout(); sock = null; }
+    clearAuthState();
+    qrCode = null;
+    connectionState = 'disconnected';
+    retry440Count = 0;
+    res.json({ state: 'disconnected' });
+});
+
+app.listen(PORT, () => {
+    console.log(`[Tenant ${TENANT_ID}] WhatsApp Bridge on port ${PORT}`);
+    connectWhatsApp();
+});
diff --git a/scripts/assign_categories_estrada.py b/scripts/assign_categories_estrada.py
new file mode 100644
index 0000000..bd748e3
--- /dev/null
+++ b/scripts/assign_categories_estrada.py
@@ -0,0 +1,138 @@
+#!/usr/bin/env python3
+"""
+Assign categories to Strada inventory based on pcode from TODO.st01.
+Creates categories if they don't exist and updates inventory.category_id.
+"""
+
+import os
+import sys
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'pos'))
+from tenant_db import get_tenant_conn
+
+# pcode → category name mapping (inferred from common auto parts codes)
+PCODE_MAP = {
+    'SU': 'Suspensión',
+    'SO': 'Soportería',
+    'MA': 'Mangueras',
+    'EM': 'Empaques',
+    'HQ': 'Herramientas y Equipo',
+    'AM': 'Amortiguadores',
+    'IG': 'Ignición y Eléctrico',
+    'BD': 'Bandas y Correas',
+    'BL': 'Baleros',
+    'FI': 'Filtros',
+    'HE': 'Herramientas',
+    'PI': 'Pistones y Anillos',
+    'AW': 'Accesorios',
+    'BE': 'Baterías y Eléctrico',
+    'K0': 'Kit de Servicio',
+    'DF': 'Frenos (Discos)',
+    'RE': 'Refrigeración',
+    'PE': 'Perfiles y Sellos',
+    'BG': 'Bujías',
+    'TA': 'Toma de Agua',
+    'CV': 'Conversiones y Kits',
+    'CT': 'Clutch y Transmisión',
+    'CC': 'Cilindros y Componentes',
+    'OT': 'Otros',
+    'SF': 'Soportes y Bases',
+    'BT': 'Bujes y Terminales',
+    'HF': 'Herramientas y Ferretería',
+    'CR': 'Cremalleras y Dirección',
+    'CS': 'Cilindros de Freno',
+    'CF': 'Cables y Frenos',
+    'FG': 'Faros y Iluminación',
+    'TO': 'Tornillería',
+    'AO': 'Aceites y Lubricantes',
+    'BJ': 'Bujes',
+    'FR': 'Frenos',
+    'DR': 'Dirección y Rótulas',
+    'KT': 'Kits de Reparación',
+    'TT': 'Transmisión',
+    'BU': 'Bujes y Soportes',
+    'PC': 'Poleas y Componentes',
+    'CL': 'Clutch',
+    'PG': 'Pegamentos y Adhesivos',
+    'QU': 'Químicos',
+    'TA': 'Toma de Agua',
+    'VC': 'Válvulas y Controles',
+    'MV': 'Motoventiladores',
+    'AS': 'Aspas y Ventiladores',
+    'PO': 'Poleas',
+    'CM': 'Compresores y A/C',
+    'HE': 'Herramientas',
+    'EA': 'Enfriadores y Radiadores',
+    'CO': 'Conectores',
+    'CX': 'Conectores y Cables',
+    'TR': 'Tren Delantero',
+    'AB': 'Abrazaderas',
+    'FU': 'Fusibles',
+    'MR': 'Mangueras de Freno',
+    'TO': 'Tornillería',
+    'RA': 'Radiadores',
+    'MC': 'Mangueras y Conectores',
+}
+
+def assign_categories(tenant_id):
+    conn = get_tenant_conn(tenant_id)
+    cur = conn.cursor()
+    
+    # Get or create categories
+    cur.execute("SELECT id, name FROM part_categories")
+    existing = {name: id for id, name in cur.fetchall()}
+    
+    created = 0
+    category_map = {}  # pcode -> category_id
+    
+    for pcode, name in PCODE_MAP.items():
+        if name in existing:
+            category_map[pcode] = existing[name]
+        else:
+            cur.execute("INSERT INTO part_categories (name) VALUES (%s) RETURNING id", (name,))
+            cat_id = cur.fetchone()[0]
+            existing[name] = cat_id
+            category_map[pcode] = cat_id
+            created += 1
+    
+    print(f"Categories: {len(existing)} total, {created} created")
+    
+    # Update inventory items based on location (pcode) field
+    updated = 0
+    for pcode, cat_id in category_map.items():
+        cur.execute("""
+            UPDATE inventory
+            SET category_id = %s
+            WHERE location = %s AND category_id IS NULL
+        """, (cat_id, pcode))
+        updated += cur.rowcount
+    
+    conn.commit()
+    cur.close()
+    conn.close()
+    
+    print(f"Updated {updated:,} inventory items with categories")
+    
+    # Show uncategorized items
+    conn = get_tenant_conn(tenant_id)
+    cur = conn.cursor()
+    cur.execute("""
+        SELECT location, COUNT(*) FROM inventory
+        WHERE category_id IS NULL AND location IS NOT NULL
+        GROUP BY location ORDER BY COUNT(*) DESC
+    """)
+    uncategorized = cur.fetchall()
+    if uncategorized:
+        print(f"\nUncategorized items by pcode:")
+        for pcode, cnt in uncategorized[:20]:
+            print(f"  {pcode}: {cnt:,}")
+    cur.close()
+    conn.close()
+
+
+if __name__ == '__main__':
+    import argparse
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--tenant', type=int, required=True)
+    args = parser.parse_args()
+    assign_categories(args.tenant)
diff --git a/scripts/import_estrada_st01.py b/scripts/import_estrada_st01.py
new file mode 100644
index 0000000..0c0aea5
--- /dev/null
+++ b/scripts/import_estrada_st01.py
@@ -0,0 +1,310 @@
+#!/usr/bin/env python3
+"""
+Nexus Autoparts — Import Strada TODO.st01 Inventory
+Parses fixed-width report and imports into tenant DB using PostgreSQL COPY.
+
+Usage:
+    python3 import_estrada_st01.py --tenant=28 --file=/tmp/todo_st01.txt --branch=1
+"""
+
+import argparse
+import csv
+import io
+import os
+import sys
+import tempfile
+import time
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'pos'))
+import psycopg2
+from tenant_db import get_tenant_conn
+
+# Margins applied to Cost A
+MARGIN_PRICE_1 = 1.35   # mostrador / retail
+MARGIN_PRICE_2 = 1.25   # taller / workshop
+MARGIN_PRICE_3 = 1.15   # mayoreo / wholesale
+
+
+def parse_number(val, default=0):
+    """Parse a string that might be '$1,234.56' or '.000' or empty."""
+    if not val:
+        return default
+    cleaned = str(val).replace('$', '').replace(',', '').replace(' ', '').strip()
+    if cleaned == '.':
+        return default
+    try:
+        return float(cleaned)
+    except ValueError:
+        return default
+
+
+def parse_st01_line(line):
+    """Parse a single line from TODO.st01 fixed-width format."""
+    line = line.rstrip('\n')
+    
+    # Skip short lines
+    if len(line) < 80:
+        return None
+    
+    # Skip header/footer lines
+    if 'Page:' in line or 'General Inventory' in line or 'STRADA AUTO' in line:
+        return None
+    if 'Tienda:' in line and 'Page:' in line:
+        return None
+    if line.strip().startswith('Line Part Number'):
+        return None
+    if line.strip().startswith('----'):
+        return None
+    
+    # Fixed-width columns based on header:
+    # Line Part Number      Description      Addl description Pcode   Instk  Min 1  Max 1     Cost A     Cost B codes[1]
+    # ---- ---------------- ---------------- ---------------- ----- ------- ------ ------ ---------- ---------- --------
+    marca = line[0:5].strip()
+    part_number_raw = line[5:21].strip()
+    description = line[22:39].strip()
+    addl_desc = line[40:56].strip()
+    pcode = line[56:61].strip()
+    instk = line[62:70].strip()
+    min1 = line[71:77].strip()
+    max1 = line[78:84].strip()
+    cost_a = line[85:95].strip()
+    cost_b = line[96:106].strip()
+    codes = line[107:].strip() if len(line) > 107 else ''
+    
+    if not part_number_raw:
+        return None
+    
+    # Build composite part number: MARCA-NUMERO
+    # Some marcas are empty (fallback to pcode or generic)
+    marca_safe = marca if marca else 'GEN'
+    part_number = f"{marca_safe}-{part_number_raw}"
+    
+    # Build name from description + additional description
+    name = description
+    if addl_desc and addl_desc != '?':
+        name = f"{description} {addl_desc}".strip()
+    
+    if not name:
+        return None
+    
+    cost = parse_number(cost_a, 0)
+    stock = int(parse_number(instk, 0))
+    min_stock = int(parse_number(min1, 0))
+    max_stock = int(parse_number(max1, 0))
+    
+    # Calculate prices with margins
+    price_1 = round(cost * MARGIN_PRICE_1, 2) if cost > 0 else 0
+    price_2 = round(cost * MARGIN_PRICE_2, 2) if cost > 0 else 0
+    price_3 = round(cost * MARGIN_PRICE_3, 2) if cost > 0 else 0
+    
+    return {
+        'part_number': part_number,
+        'name': name[:300],  # truncate to schema limit
+        'brand': marca_safe,
+        'cost': cost,
+        'price_1': price_1,
+        'price_2': price_2,
+        'price_3': price_3,
+        'stock': stock,
+        'min_stock': min_stock,
+        'max_stock': max_stock,
+        'location': pcode,
+        'unit': 'PZA',
+        'tax_rate': 0.16,
+    }
+
+
+def import_st01(tenant_id, file_path, branch_id=1):
+    print(f"=== Importing Strada inventory ===")
+    print(f"Tenant: {tenant_id}")
+    print(f"File:   {file_path}")
+    print(f"Branch: {branch_id}")
+    print()
+    
+    # Parse file
+    print("Parsing fixed-width file...")
+    parsed = []
+    skipped = 0
+    start_time = time.time()
+    
+    with open(file_path, 'r', encoding='utf-8', errors='replace') as f:
+        for line in f:
+            row = parse_st01_line(line)
+            if row is None:
+                skipped += 1
+                continue
+            parsed.append(row)
+    
+    parse_time = time.time() - start_time
+    print(f"  Parsed: {len(parsed):,} rows")
+    print(f"  Skipped: {skipped:,} lines (headers/empty)")
+    print(f"  Time: {parse_time:.1f}s")
+    print()
+    
+    if not parsed:
+        print("ERROR: No data rows found.")
+        return
+    
+    # Show sample
+    print("Sample rows:")
+    for row in parsed[:5]:
+        print(f"  {row['part_number']:20} | {row['name'][:40]:40} | stk={row['stock']:>4} | cost={row['cost']:>10.2f} | p1={row['price_1']:>10.2f}")
+    print()
+    
+    # Connect to tenant DB
+    conn = get_tenant_conn(tenant_id)
+    cur = conn.cursor()
+    
+    # Ensure branch exists
+    cur.execute("SELECT id FROM branches WHERE id = %s", (branch_id,))
+    if not cur.fetchone():
+        print(f"ERROR: Branch {branch_id} does not exist. Creating default branch...")
+        cur.execute("INSERT INTO branches (name) VALUES ('Principal') RETURNING id")
+        branch_id = cur.fetchone()[0]
+        conn.commit()
+        print(f"  Created branch id={branch_id}")
+    
+    # Step 1: Create temp table and COPY data
+    print("Creating temp table...")
+    cur.execute("""
+        DROP TABLE IF EXISTS tmp_st01_import;
+        CREATE TEMP TABLE tmp_st01_import (
+            part_number VARCHAR(100),
+            name VARCHAR(300),
+            brand VARCHAR(100),
+            cost NUMERIC(12,2),
+            price_1 NUMERIC(12,2),
+            price_2 NUMERIC(12,2),
+            price_3 NUMERIC(12,2),
+            stock INTEGER,
+            min_stock INTEGER,
+            max_stock INTEGER,
+            location VARCHAR(50),
+            unit VARCHAR(20),
+            tax_rate NUMERIC(5,4)
+        );
+    """)
+    conn.commit()
+    
+    print("COPY to temp table...")
+    csv_buffer = io.StringIO()
+    writer = csv.writer(csv_buffer, lineterminator='\n')
+    for row in parsed:
+        writer.writerow([
+            row['part_number'],
+            row['name'],
+            row['brand'],
+            row['cost'],
+            row['price_1'],
+            row['price_2'],
+            row['price_3'],
+            row['stock'],
+            row['min_stock'],
+            row['max_stock'],
+            row['location'],
+            row['unit'],
+            row['tax_rate'],
+        ])
+    
+    csv_buffer.seek(0)
+    cur.copy_expert(
+        """COPY tmp_st01_import (
+            part_number, name, brand, cost, price_1, price_2, price_3,
+            stock, min_stock, max_stock, location, unit, tax_rate
+        ) FROM STDIN WITH (FORMAT CSV)""",
+        csv_buffer
+    )
+    conn.commit()
+    
+    cur.execute("SELECT COUNT(*) FROM tmp_st01_import")
+    copied = cur.fetchone()[0]
+    print(f"  Copied: {copied:,} rows")
+    print()
+    
+    # Step 2: Insert into inventory
+    print("Inserting into inventory...")
+    start_time = time.time()
+    cur.execute("""
+        INSERT INTO inventory (
+            branch_id, part_number, name, brand,
+            cost, price_1, price_2, price_3,
+            min_stock, max_stock, location, unit, tax_rate, is_active
+        )
+        SELECT
+            %s, part_number, name, brand,
+            cost, price_1, price_2, price_3,
+            min_stock, max_stock, location, unit, tax_rate, TRUE
+        FROM tmp_st01_import
+        ON CONFLICT (branch_id, part_number) DO UPDATE SET
+            name = EXCLUDED.name,
+            brand = EXCLUDED.brand,
+            cost = EXCLUDED.cost,
+            price_1 = EXCLUDED.price_1,
+            price_2 = EXCLUDED.price_2,
+            price_3 = EXCLUDED.price_3,
+            min_stock = EXCLUDED.min_stock,
+            max_stock = EXCLUDED.max_stock,
+            location = EXCLUDED.location,
+            is_active = TRUE
+    """, (branch_id,))
+    conn.commit()
+    insert_time = time.time() - start_time
+    
+    cur.execute("SELECT COUNT(*) FROM inventory WHERE branch_id = %s", (branch_id,))
+    total_inventory = cur.fetchone()[0]
+    print(f"  Inventory rows: {total_inventory:,}")
+    print(f"  Time: {insert_time:.1f}s")
+    print()
+    
+    # Step 3: Create stock operations for items with stock > 0
+    print("Creating initial stock operations...")
+    start_time = time.time()
+    cur.execute("""
+        INSERT INTO inventory_operations (
+            inventory_id, branch_id, operation_type, quantity,
+            cost_at_time, reference_type, notes
+        )
+        SELECT
+            i.id,
+            i.branch_id,
+            'INITIAL',
+            t.stock,
+            i.cost,
+            'IMPORT',
+            'Importado desde TODO.st01'
+        FROM tmp_st01_import t
+        JOIN inventory i ON i.part_number = t.part_number AND i.branch_id = %s
+        WHERE t.stock > 0
+    """, (branch_id,))
+    conn.commit()
+    ops_time = time.time() - start_time
+    
+    cur.execute("SELECT COUNT(*) FROM inventory_operations WHERE operation_type = 'INITIAL'")
+    total_ops = cur.fetchone()[0]
+    print(f"  Stock operations created: {total_ops:,}")
+    print(f"  Time: {ops_time:.1f}s")
+    print()
+    
+    # Cleanup
+    cur.execute("DROP TABLE IF EXISTS tmp_st01_import")
+    conn.commit()
+    cur.close()
+    conn.close()
+    
+    print("=== Import complete ===")
+    print(f"Total inventory items: {total_inventory:,}")
+    print(f"Items with stock > 0:  {total_ops:,}")
+
+
+def main():
+    parser = argparse.ArgumentParser(description='Import Strada TODO.st01 into Nexus tenant')
+    parser.add_argument('--tenant', type=int, required=True, help='Tenant ID')
+    parser.add_argument('--file', required=True, help='Path to TODO.st01 file')
+    parser.add_argument('--branch', type=int, default=1, help='Branch ID (default: 1)')
+    args = parser.parse_args()
+    
+    import_st01(args.tenant, args.file, args.branch)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/scripts/import_pdf_catalog.py b/scripts/import_pdf_catalog.py
new file mode 100755
index 0000000..cd05252
--- /dev/null
+++ b/scripts/import_pdf_catalog.py
@@ -0,0 +1,439 @@
+#!/usr/bin/env python3
+"""
+Import aftermarket parts catalog from PDF into Nexus Autoparts DB.
+
+Usage:
+  # Extract and preview (generates CSV for review)
+  python3 scripts/import_pdf_catalog.py extract catalogo_bosch.pdf "BOSCH" --output bosch_preview.csv
+
+  # Import after reviewing CSV
+  python3 scripts/import_pdf_catalog.py import bosch_preview.csv "BOSCH"
+
+The CSV should have columns:
+  part_number, name, price_usd, applications
+
+Applications column (optional): comma-separated vehicle descriptions like:
+  "TOYOTA COROLLA 2015-2020, NISSAN SENTRA 2016-2019"
+
+If applications is empty, the part will be created but not linked to vehicles.
+"""
+
+import os
+import sys
+import re
+import csv
+import json
+import argparse
+import subprocess
+import psycopg2
+from pathlib import Path
+
+# Add parent to path for config imports
+sys.path.insert(0, str(Path(__file__).parent.parent / "pos"))
+
+MASTER_DB_URL = os.environ.get("MASTER_DB_URL", "postgresql://postgres@localhost/nexus_autoparts")
+
+
+def get_db_conn():
+    return psycopg2.connect(MASTER_DB_URL)
+
+
+def pdf_to_text(pdf_path):
+    """Extract text from PDF using pdftotext (preserves layout)."""
+    result = subprocess.run(
+        ["pdftotext", "-layout", pdf_path, "-"],
+        capture_output=True, text=True
+    )
+    if result.returncode != 0:
+        raise RuntimeError(f"pdftotext failed: {result.stderr}")
+    return result.stdout
+
+
+def extract_lines_fuzzy(text, min_cols=2):
+    """
+    Heuristic table extractor.
+    Looks for lines that have:
+      - A part number pattern (alphanumeric with dashes/slashes, 3+ chars)
+      - Some description text
+    Returns list of dicts with raw columns.
+    """
+    rows = []
+    lines = text.splitlines()
+
+    # Part number patterns: BOSCH 0 986 AF1 041, MOOG K80001, NGK BKR6E, etc.
+    part_number_patterns = [
+        re.compile(r'\b[0-9A-Z]{3,}(?:[-\s/][0-9A-Z]+){1,}\b'),  # codes with separators
+        re.compile(r'\b[A-Z]{1,3}\d{3,}[A-Z0-9]*\b'),             # MOOG K80001, NGK BKR6E
+        re.compile(r'\b\d{3,}[A-Z]{1,3}\d+\b'),                    # 123ABC45
+    ]
+
+    for line in lines:
+        line = line.strip()
+        if len(line) < 10:
+            continue
+
+        # Try to find a part number
+        part_number = None
+        for pat in part_number_patterns:
+            m = pat.search(line)
+            if m:
+                part_number = m.group(0).strip()
+                break
+
+        if not part_number:
+            continue
+
+        # Split line by 2+ spaces to get columns
+        cols = [c.strip() for c in re.split(r'\s{2,}', line) if c.strip()]
+        if len(cols) < min_cols:
+            continue
+
+        # Heuristic: part number is usually first or second column
+        # The rest is description, possibly with price at the end
+        name_parts = []
+        price = None
+        for col in cols:
+            if col == part_number:
+                continue
+            # Price detection
+            price_m = re.match(r'^\$?([0-9]{1,6}(?:\.[0-9]{1,2})?)$', col.replace(',', ''))
+            if price_m and not price:
+                price = float(price_m.group(1))
+                continue
+            name_parts.append(col)
+
+        name = ' '.join(name_parts) if name_parts else part_number
+        # Clean up name
+        name = re.sub(r'\s+', ' ', name).strip()
+        if len(name) < 3:
+            name = part_number
+
+        rows.append({
+            'part_number': part_number,
+            'name': name,
+            'price_usd': price,
+            'applications': '',
+            'raw': line,
+        })
+
+    return rows
+
+
+def preview_rows(rows, limit=20):
+    print(f"\nExtracted {len(rows)} candidate rows. First {limit}:")
+    print("-" * 100)
+    for i, r in enumerate(rows[:limit]):
+        print(f"{i+1}. PN: {r['part_number'][:30]:30s} | Name: {r['name'][:50]:50s} | Price: {r['price_usd']}")
+    print("-" * 100)
+
+
+def save_csv(rows, path):
+    with open(path, 'w', newline='', encoding='utf-8') as f:
+        writer = csv.DictWriter(f, fieldnames=['part_number', 'name', 'price_usd', 'applications'])
+        writer.writeheader()
+        for r in rows:
+            writer.writerow({
+                'part_number': r['part_number'],
+                'name': r['name'],
+                'price_usd': r['price_usd'] or '',
+                'applications': r['applications'],
+            })
+    print(f"Saved preview to {path}")
+
+
+def load_csv(path):
+    rows = []
+    with open(path, 'r', encoding='utf-8') as f:
+        reader = csv.DictReader(f)
+        for row in reader:
+            price = row.get('price_usd', '')
+            try:
+                price = float(price) if price else None
+            except ValueError:
+                price = None
+            rows.append({
+                'part_number': row.get('part_number', '').strip(),
+                'name': row.get('name', '').strip(),
+                'price_usd': price,
+                'applications': row.get('applications', '').strip(),
+            })
+    return rows
+
+
+def resolve_manufacturer(cur, name):
+    """Get or create manufacturer. Returns id_manufacture."""
+    cur.execute(
+        "SELECT id_manufacture FROM manufacturers WHERE UPPER(name_manufacture) = UPPER(%s)",
+        (name,)
+    )
+    row = cur.fetchone()
+    if row:
+        return row[0]
+
+    # Insert new manufacturer
+    cur.execute(
+        "INSERT INTO manufacturers (name_manufacture) VALUES (%s) RETURNING id_manufacture",
+        (name.upper() if len(name) <= 6 else name,)
+    )
+    return cur.fetchone()[0]
+
+
+def resolve_or_create_part(cur, oem_part_number, name):
+    """
+    parts.oem_part_number has UNIQUE index.
+    If it exists, return id_part. If not, insert.
+    """
+    cur.execute(
+        "SELECT id_part, name_part FROM parts WHERE oem_part_number = %s",
+        (oem_part_number,)
+    )
+    row = cur.fetchone()
+    if row:
+        return row[0]
+
+    # Need a group_id. Use 'General' group as default.
+    cur.execute("SELECT id_part_group FROM part_groups WHERE name_part_group = 'General' LIMIT 1")
+    grow = cur.fetchone()
+    group_id = grow[0] if grow else None
+
+    cur.execute(
+        """
+        INSERT INTO parts (oem_part_number, name_part, group_id)
+        VALUES (%s, %s, %s)
+        RETURNING id_part
+        """,
+        (oem_part_number, name, group_id)
+    )
+    return cur.fetchone()[0]
+
+
+def parse_applications(app_text):
+    """
+    Parse text like 'TOYOTA COROLLA 2015-2020, NISSAN SENTRA 2016-2019'
+    into list of (brand, model, year_from, year_to).
+    """
+    if not app_text:
+        return []
+
+    results = []
+    # Split by commas or slashes
+    entries = re.split(r'[,;/]', app_text)
+
+    for entry in entries:
+        entry = entry.strip()
+        if not entry:
+            continue
+
+        # Pattern: BRAND MODEL YEAR-YEAR  or  BRAND MODEL YEAR
+        m = re.match(
+            r'^([A-Z][A-Z\s]{1,20}?)\s+([A-Z0-9][A-Z0-9\s\-_]{1,30}?)\s+(\d{4})(?:\s*-\s*(\d{4}))?$',
+            entry.upper().strip()
+        )
+        if m:
+            brand = m.group(1).strip()
+            model = m.group(2).strip()
+            year_from = int(m.group(3))
+            year_to = int(m.group(4)) if m.group(4) else year_from
+            results.append((brand, model, year_from, year_to))
+        else:
+            # Try looser pattern: just BRAND MODEL
+            m2 = re.match(r'^([A-Z][A-Z\s]{1,20}?)\s+([A-Z0-9][A-Z0-9\s\-_]{1,30})$', entry.upper().strip())
+            if m2:
+                results.append((m2.group(1).strip(), m2.group(2).strip(), None, None))
+
+    return results
+
+
+def resolve_mye_ids(cur, brand_name, model_name, year_from, year_to):
+    """Find MYE ids matching brand/model/year range."""
+    myes = []
+
+    # Find brand
+    cur.execute("SELECT id_brand FROM brands WHERE UPPER(name_brand) = UPPER(%s)", (brand_name,))
+    brow = cur.fetchone()
+    if not brow:
+        return myes
+    brand_id = brow[0]
+
+    # Find model (fuzzy)
+    cur.execute(
+        """
+        SELECT id_model, name_model FROM models
+        WHERE brand_id = %s AND UPPER(name_model) LIKE UPPER(%s)
+        ORDER BY name_model
+        LIMIT 5
+        """,
+        (brand_id, f"%{model_name}%")
+    )
+    models = cur.fetchall()
+    if not models:
+        return myes
+
+    # Use first match
+    model_id = models[0][0]
+
+    # Find MYEs for year range
+    if year_from and year_to:
+        cur.execute(
+            """
+            SELECT mye.id_mye FROM model_year_engine mye
+            JOIN years y ON y.id_year = mye.year_id
+            WHERE mye.model_id = %s AND y.year_car BETWEEN %s AND %s
+            """,
+            (model_id, year_from, year_to)
+        )
+    elif year_from:
+        cur.execute(
+            """
+            SELECT mye.id_mye FROM model_year_engine mye
+            JOIN years y ON y.id_year = mye.year_id
+            WHERE mye.model_id = %s AND y.year_car = %s
+            """,
+            (model_id, year_from)
+        )
+    else:
+        cur.execute(
+            "SELECT id_mye FROM model_year_engine WHERE model_id = %s",
+            (model_id,)
+        )
+
+    myes = [r[0] for r in cur.fetchall()]
+    return myes
+
+
+def import_rows(rows, manufacturer_name, dry_run=False):
+    conn = get_db_conn()
+    cur = conn.cursor()
+
+    try:
+        manufacturer_id = resolve_manufacturer(cur, manufacturer_name)
+        print(f"Manufacturer '{manufacturer_name}' → id={manufacturer_id}")
+
+        inserted_parts = 0
+        inserted_am = 0
+        linked_vehicles = 0
+        skipped = 0
+
+        for i, row in enumerate(rows):
+            pn = row['part_number']
+            name = row['name'] or pn
+            price = row['price_usd']
+
+            if not pn:
+                skipped += 1
+                continue
+
+            if dry_run:
+                print(f"  [DRY] {pn} | {name[:40]} | ${price}")
+                continue
+
+            # 1. Ensure part exists in parts table
+            part_id = resolve_or_create_part(cur, pn, name)
+
+            # 2. Insert/upsert aftermarket_parts
+            cur.execute(
+                """
+                SELECT id_aftermarket_parts FROM aftermarket_parts
+                WHERE part_number = %s AND manufacturer_id = %s
+                """,
+                (pn, manufacturer_id)
+            )
+            existing = cur.fetchone()
+            if existing:
+                # Update
+                cur.execute(
+                    """
+                    UPDATE aftermarket_parts
+                    SET name_aftermarket_parts = %s,
+                        price_usd = COALESCE(%s, price_usd),
+                        oem_part_id = %s
+                    WHERE id_aftermarket_parts = %s
+                    """,
+                    (name, price, part_id, existing[0])
+                )
+            else:
+                cur.execute(
+                    """
+                    INSERT INTO aftermarket_parts
+                    (oem_part_id, manufacturer_id, part_number, name_aftermarket_parts, price_usd)
+                    VALUES (%s, %s, %s, %s, %s)
+                    """,
+                    (part_id, manufacturer_id, pn, name, price)
+                )
+                inserted_am += 1
+
+            inserted_parts += 1
+
+            # 3. Link vehicles if applications provided
+            apps = row.get('applications', '')
+            if apps:
+                parsed = parse_applications(apps)
+                for brand, model, yf, yt in parsed:
+                    myes = resolve_mye_ids(cur, brand, model, yf, yt)
+                    for mye_id in myes:
+                        cur.execute(
+                            """
+                            INSERT INTO vehicle_parts (part_id, model_year_engine_id)
+                            VALUES (%s, %s)
+                            ON CONFLICT DO NOTHING
+                            """,
+                            (part_id, mye_id)
+                        )
+                        linked_vehicles += 1
+
+            if (i + 1) % 100 == 0:
+                print(f"  ... processed {i+1}/{len(rows)}")
+
+        conn.commit()
+        print(f"\nDone!")
+        print(f"  Parts processed: {inserted_parts}")
+        print(f"  Aftermarket parts inserted/updated: {inserted_am}")
+        print(f"  Vehicle links created: {linked_vehicles}")
+        print(f"  Skipped (no PN): {skipped}")
+
+    except Exception as e:
+        conn.rollback()
+        raise
+    finally:
+        cur.close()
+        conn.close()
+
+
+def main():
+    parser = argparse.ArgumentParser(description='Import aftermarket catalog from PDF')
+    subparsers = parser.add_subparsers(dest='command')
+
+    # Extract command
+    ext = subparsers.add_parser('extract', help='Extract PDF to preview CSV')
+    ext.add_argument('pdf', help='Path to PDF file')
+    ext.add_argument('manufacturer', help='Manufacturer name')
+    ext.add_argument('--output', '-o', default='catalog_preview.csv', help='Output CSV path')
+
+    # Import command
+    imp = subparsers.add_parser('import', help='Import reviewed CSV to DB')
+    imp.add_argument('csv', help='Path to reviewed CSV')
+    imp.add_argument('manufacturer', help='Manufacturer name')
+    imp.add_argument('--dry-run', action='store_true', help='Preview without writing to DB')
+
+    args = parser.parse_args()
+
+    if args.command == 'extract':
+        print(f"Extracting {args.pdf}...")
+        text = pdf_to_text(args.pdf)
+        rows = extract_lines_fuzzy(text)
+        preview_rows(rows)
+        save_csv(rows, args.output)
+        print(f"\nNext step: Review {args.output}, add 'applications' column if needed,")
+        print(f"then run: python3 scripts/import_pdf_catalog.py import {args.output} '{args.manufacturer}'")
+
+    elif args.command == 'import':
+        rows = load_csv(args.csv)
+        print(f"Loaded {len(rows)} rows from {args.csv}")
+        import_rows(rows, args.manufacturer, dry_run=args.dry_run)
+
+    else:
+        parser.print_help()
+
+
+if __name__ == '__main__':
+    main()
diff --git a/scripts/qwen_batch_compat.py b/scripts/qwen_batch_compat.py
new file mode 100644
index 0000000..f09377c
--- /dev/null
+++ b/scripts/qwen_batch_compat.py
@@ -0,0 +1,231 @@
+#!/usr/bin/env python3
+"""
+Mass QWEN vehicle compatibility processor for Strada.
+Processes inventory items in batches of 5 with parallel workers.
+
+Usage:
+    python3 qwen_batch_compat.py --tenant=28 --batch-size=5 --workers=10 --checkpoint=qwen_progress.json
+"""
+
+import argparse
+import json
+import os
+import sys
+import time
+from concurrent.futures import ThreadPoolExecutor, as_completed
+from threading import Lock
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'pos'))
+import psycopg2
+from tenant_db import get_tenant_conn, get_master_conn
+from services.qwen_fitment import get_vehicle_fitment
+
+DEFAULT_CHECKPOINT_FILE = '/tmp/qwen_progress.json'
+PROGRESS_LOCK = Lock()
+
+
+def load_checkpoint(checkpoint_file):
+    if os.path.exists(checkpoint_file):
+        with open(checkpoint_file, 'r') as f:
+            return set(json.load(f))
+    return set()
+
+
+def save_checkpoint(checkpoint_file, processed_ids):
+    with PROGRESS_LOCK:
+        with open(checkpoint_file, 'w') as f:
+            json.dump(list(processed_ids), f)
+
+
+def get_pending_items(tenant_id, processed_ids, limit=None):
+    """Get inventory items that haven't been processed yet."""
+    conn = get_tenant_conn(tenant_id)
+    cur = conn.cursor()
+    
+    # Get items without vehicle compatibility records
+    if processed_ids:
+        placeholders = ','.join(['%s'] * len(processed_ids))
+        query = f"""
+            SELECT id, part_number, name, brand 
+            FROM inventory 
+            WHERE id NOT IN ({placeholders})
+            AND is_active = true
+            ORDER BY id
+        """
+        cur.execute(query, tuple(processed_ids))
+    else:
+        cur.execute("""
+            SELECT id, part_number, name, brand 
+            FROM inventory 
+            WHERE is_active = true
+            ORDER BY id
+        """)
+    
+    rows = cur.fetchall()
+    cur.close()
+    conn.close()
+    
+    if limit:
+        rows = rows[:limit]
+    return rows
+
+
+def process_single_item(item_id, part_number, name, brand):
+    """Process one item with QWEN."""
+    try:
+        result = get_vehicle_fitment(part_number, name, brand)
+        return {
+            'item_id': item_id,
+            'part_number': part_number,
+            'success': True,
+            'vehicles': result.get('vehicles', []),
+            'confidence': result.get('confidence', 0),
+            'notes': result.get('notes', ''),
+        }
+    except Exception as exc:
+        return {
+            'item_id': item_id,
+            'part_number': part_number,
+            'success': False,
+            'error': str(exc),
+        }
+
+
+def save_results(tenant_id, results):
+    """Save QWEN results to inventory_vehicle_compat."""
+    if not results:
+        return 0
+    
+    conn = get_tenant_conn(tenant_id)
+    cur = conn.cursor()
+    
+    saved = 0
+    for result in results:
+        if not result.get('success'):
+            continue
+        
+        item_id = result['item_id']
+        vehicles = result.get('vehicles', [])[:200]  # Limit to 200 vehicles per item
+        confidence = result.get('confidence', 0)
+        
+        for v in vehicles:
+            mye_id = v.get('mye_id')
+            if mye_id:
+                cur.execute("""
+                    INSERT INTO inventory_vehicle_compat
+                    (inventory_id, model_year_engine_id, source, confidence, make, model, year, created_at)
+                    VALUES (%s, %s, 'qwen_ai', %s, %s, %s, %s, NOW())
+                    ON CONFLICT (inventory_id, model_year_engine_id, make, model, year) DO NOTHING
+                """, (item_id, mye_id, confidence, v.get('make'), v.get('model'), v.get('year')))
+            else:
+                cur.execute("""
+                    INSERT INTO inventory_vehicle_compat
+                    (inventory_id, model_year_engine_id, source, confidence, make, model, year, engine, engine_code, created_at)
+                    VALUES (%s, NULL, 'qwen_ai', %s, %s, %s, %s, %s, %s, NOW())
+                """, (item_id, confidence, v.get('make'), v.get('model'), v.get('year'), v.get('engine'), v.get('engine_code')))
+            saved += 1
+    
+    conn.commit()
+    cur.close()
+    conn.close()
+    return saved
+
+
+def main():
+    parser = argparse.ArgumentParser(description='Batch QWEN vehicle compatibility processor')
+    parser.add_argument('--tenant', type=int, required=True, help='Tenant ID')
+    parser.add_argument('--workers', type=int, default=10, help='Number of parallel workers')
+    parser.add_argument('--limit', type=int, default=None, help='Max items to process (None = all)')
+    parser.add_argument('--checkpoint-file', default=DEFAULT_CHECKPOINT_FILE, help='Progress checkpoint file')
+    args = parser.parse_args()
+    
+    checkpoint_file = args.checkpoint_file
+    
+    print(f"=== QWEN Batch Compatibility Processor ===", flush=True)
+    print(f"Tenant: {args.tenant}", flush=True)
+    print(f"Workers: {args.workers}", flush=True)
+    print(f"Checkpoint: {args.checkpoint_file}", flush=True)
+    print(flush=True)
+    
+    # Load checkpoint
+    processed_ids = load_checkpoint(checkpoint_file)
+    print(f"Previously processed: {len(processed_ids):,} items", flush=True)
+    
+    # Get pending items
+    pending = get_pending_items(args.tenant, processed_ids, args.limit)
+    print(f"Pending items: {len(pending):,}", flush=True)
+    
+    if not pending:
+        print("Nothing to process!", flush=True)
+        return
+    
+    # Process with thread pool
+    total = len(pending)
+    completed = 0
+    success_count = 0
+    fail_count = 0
+    total_vehicles = 0
+    start_time = time.time()
+    
+    with ThreadPoolExecutor(max_workers=args.workers) as executor:
+        future_to_item = {
+            executor.submit(process_single_item, item[0], item[1], item[2], item[3]): item
+            for item in pending
+        }
+        
+        batch_results = []
+        batch_size = 50  # Save to DB every N items
+        
+        for future in as_completed(future_to_item):
+            item = future_to_item[future]
+            try:
+                result = future.result(timeout=180)
+                batch_results.append(result)
+                
+                if result['success']:
+                    success_count += 1
+                    total_vehicles += len(result.get('vehicles', []))
+                else:
+                    fail_count += 1
+                
+                processed_ids.add(result['item_id'])
+                
+            except Exception as exc:
+                fail_count += 1
+                processed_ids.add(item[0])
+                print(f"Worker exception for {item[1]}: {exc}")
+            
+            completed += 1
+            
+            # Save checkpoint and DB batch periodically
+            if len(batch_results) >= batch_size:
+                save_checkpoint(checkpoint_file, list(processed_ids))
+                saved = save_results(args.tenant, batch_results)
+                batch_results = []
+                
+                elapsed = time.time() - start_time
+                rate = completed / elapsed if elapsed > 0 else 0
+                eta = (total - completed) / rate if rate > 0 else 0
+                
+                print(f"  Progress: {completed:,}/{total:,} ({100*completed/total:.1f}%) | "
+                      f"Success: {success_count} | Fail: {fail_count} | "
+                      f"Vehicles: {total_vehicles} | "
+                      f"Rate: {rate:.1f} items/min | ETA: {eta/60:.0f} min", flush=True)
+    
+    # Final save
+    if batch_results:
+        save_results(args.tenant, batch_results)
+    save_checkpoint(checkpoint_file, list(processed_ids))
+    
+    elapsed = time.time() - start_time
+    print(f"\n=== Complete ===", flush=True)
+    print(f"Processed: {completed:,}", flush=True)
+    print(f"Success: {success_count}", flush=True)
+    print(f"Failed: {fail_count}", flush=True)
+    print(f"Total vehicles found: {total_vehicles}", flush=True)
+    print(f"Elapsed: {elapsed/3600:.1f} hours", flush=True)
+    print(f"Avg rate: {completed/(elapsed/60):.1f} items/min", flush=True)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/scripts/sync_estrada_marketplace_full.py b/scripts/sync_estrada_marketplace_full.py
new file mode 100644
index 0000000..1042849
--- /dev/null
+++ b/scripts/sync_estrada_marketplace_full.py
@@ -0,0 +1,321 @@
+#!/usr/bin/env python3
+"""
+Nexus Autoparts — Sync ALL Strada inventory to marketplace (backfill 133k items).
+
+Extends warehouse_inventory with seller listings for parts that don't match
+the OEM catalog. Items that DO match keep their part_id; unmatched items
+get part_id=NULL with seller_part_number / seller_part_name populated.
+
+Usage:
+    export MASTER_DB_URL="postgresql://user:pass@localhost/nexus_autoparts"
+    export TENANT_DB_URL_TEMPLATE="postgresql://user:pass@localhost/{db_name}"
+    python3 sync_estrada_marketplace_full.py --tenant=28 --bodega=7 --branch=1
+
+Safe to re-run: uses UPSERT semantics.
+"""
+
+import argparse
+import csv
+import io
+import os
+import sys
+import tempfile
+import time
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'pos'))
+import psycopg2
+from tenant_db import get_tenant_conn
+
+
+BATCH_SIZE = 5000
+
+
+def get_master_conn():
+    from config import MASTER_DB_URL
+    return psycopg2.connect(MASTER_DB_URL)
+
+
+def load_catalog_maps(master_conn):
+    """Pre-load OEM part_number → part_id and cross-reference maps."""
+    cur = master_conn.cursor()
+
+    print("[1/5] Loading OEM catalog...")
+    cur.execute("SELECT id_part, oem_part_number FROM parts")
+    oem_map = {}
+    for row in cur:
+        pn = row[1].strip() if row[1] else ''
+        if pn:
+            oem_map[pn] = row[0]
+
+    print("[2/5] Loading cross-references...")
+    cur.execute("SELECT cross_reference_number, part_id FROM part_cross_references")
+    cross_map = {}
+    for row in cur:
+        pn = row[0].strip() if row[0] else ''
+        if pn:
+            cross_map[pn] = row[1]
+
+    cur.close()
+    print(f"       OEM parts: {len(oem_map):,}  |  Cross-references: {len(cross_map):,}")
+    return oem_map, cross_map
+
+
+def read_tenant_inventory(tenant_conn, branch_id):
+    """Read all active inventory items from tenant DB."""
+    cur = tenant_conn.cursor()
+    print("[3/5] Reading tenant inventory...")
+
+    # Join with categories to get category name
+    cur.execute("""
+        SELECT
+            i.id,
+            i.part_number,
+            i.name,
+            i.price_1,
+            COALESCE(iss.stock, 0) AS stock,
+            c.name AS category_name
+        FROM inventory i
+        LEFT JOIN inventory_stock_summary iss ON iss.inventory_id = i.id
+        LEFT JOIN part_categories c ON c.id = i.category_id
+        WHERE i.is_active = true
+          AND (i.branch_id = %s OR %s IS NULL)
+        ORDER BY i.id
+    """, (branch_id, branch_id))
+
+    items = []
+    for row in cur:
+        items.append({
+            'id': row[0],
+            'part_number': (row[1] or '').strip(),
+            'name': (row[2] or '').strip(),
+            'price': float(row[3] or 0),
+            'stock': int(row[4] or 0),
+            'category': (row[5] or '').strip(),
+        })
+
+    cur.close()
+    print(f"       Tenant items: {len(items):,}")
+    return items
+
+
+def classify_items(items, oem_map, cross_map):
+    """Split items into OEM-matched and seller listings."""
+    matched = []
+    seller = []
+
+    for it in items:
+        pn = it['part_number']
+        if not pn:
+            continue
+
+        # Try exact match on OEM or cross-reference
+        part_id = oem_map.get(pn)
+        if not part_id:
+            # Try without brand prefix (e.g. "4S-86050" → "86050")
+            raw = pn.split('-', 1)[1] if '-' in pn else pn
+            part_id = oem_map.get(raw) or oem_map.get(pn) or cross_map.get(raw) or cross_map.get(pn)
+
+        if part_id:
+            matched.append({**it, 'part_id': part_id})
+        else:
+            seller.append(it)
+
+    print(f"       Matched (OEM): {len(matched):,}  |  Seller listings: {len(seller):,}")
+    return matched, seller
+
+
+def sync_to_warehouse(master_conn, bodega_id, matched, seller):
+    """Bulk upsert into warehouse_inventory using COPY."""
+    cur = master_conn.cursor()
+
+    # Create temp table matching warehouse_inventory structure
+    cur.execute("""
+        CREATE TEMP TABLE tmp_wi (
+            user_id INT,
+            part_id INT,
+            seller_part_number VARCHAR(100),
+            seller_part_name VARCHAR(300),
+            seller_category VARCHAR(100),
+            tenant_inventory_id INT,
+            price NUMERIC(12,2),
+            stock_quantity INT,
+            min_order_quantity INT DEFAULT 1,
+            warehouse_location VARCHAR(100) DEFAULT 'Principal',
+            bodega_id INT,
+            currency VARCHAR(3) DEFAULT 'MXN'
+        ) ON COMMIT DROP
+    """)
+
+    print("[4/5] Preparing batches...")
+    buffer = io.StringIO()
+    writer = csv.writer(buffer, lineterminator='\n',
+                        quoting=csv.QUOTE_MINIMAL)
+
+    total = 0
+    for it in matched + seller:
+        part_id = it.get('part_id')
+        seller_pn = None if part_id else it['part_number']
+        seller_name = None if part_id else (it['name'] or it['part_number'])
+        seller_cat = None if part_id else it['category']
+
+        writer.writerow([
+            1,                      # user_id (legacy FK, must match existing rows for bodega 7)
+            part_id,                # part_id (NULL for seller listings)
+            seller_pn,              # seller_part_number
+            seller_name,            # seller_part_name
+            seller_cat,             # seller_category
+            it['id'],               # tenant_inventory_id
+            it['price'],            # price
+            max(0, it['stock']),    # stock_quantity
+            1,                      # min_order_quantity
+            'Principal',            # warehouse_location
+            bodega_id,              # bodega_id
+            'MXN',                  # currency
+        ])
+        total += 1
+
+        if total % BATCH_SIZE == 0:
+            buffer.seek(0)
+            cur.copy_expert("""
+                COPY tmp_wi (user_id, part_id, seller_part_number, seller_part_name,
+                             seller_category, tenant_inventory_id, price, stock_quantity,
+                             min_order_quantity, warehouse_location, bodega_id, currency)
+                FROM STDIN WITH (FORMAT CSV, NULL '')
+            """, buffer)
+            buffer = io.StringIO()
+            writer = csv.writer(buffer, lineterminator='\n',
+                                quoting=csv.QUOTE_MINIMAL)
+            print(f"       Buffered {total:,} rows...")
+
+    # Final batch
+    if buffer.tell() > 0:
+        buffer.seek(0)
+        cur.copy_expert("""
+            COPY tmp_wi (user_id, part_id, seller_part_number, seller_part_name,
+                         seller_category, tenant_inventory_id, price, stock_quantity,
+                         min_order_quantity, warehouse_location, bodega_id, currency)
+            FROM STDIN WITH (FORMAT CSV, NULL '')
+        """, buffer)
+
+    print(f"[5/5] Upserting {total:,} rows into warehouse_inventory...")
+
+    # --- Update existing OEM-matched rows ---
+    cur.execute("""
+        UPDATE warehouse_inventory wi
+        SET
+            price = tmp.price,
+            stock_quantity = tmp.stock_quantity,
+            user_id = tmp.user_id,
+            currency = tmp.currency,
+            updated_at = NOW()
+        FROM tmp_wi tmp
+        WHERE wi.bodega_id = tmp.bodega_id
+          AND wi.part_id = tmp.part_id
+          AND wi.warehouse_location = tmp.warehouse_location
+          AND tmp.part_id IS NOT NULL
+    """)
+    matched_updated = cur.rowcount
+
+    # --- Insert new OEM-matched rows ---
+    cur.execute("""
+        INSERT INTO warehouse_inventory (
+            user_id, part_id, seller_part_number, seller_part_name,
+            seller_category, tenant_inventory_id, price, stock_quantity,
+            min_order_quantity, warehouse_location, bodega_id, currency, updated_at
+        )
+        SELECT
+            user_id, part_id, seller_part_number, seller_part_name,
+            seller_category, tenant_inventory_id, price, stock_quantity,
+            min_order_quantity, warehouse_location, bodega_id, currency, NOW()
+        FROM tmp_wi tmp
+        WHERE part_id IS NOT NULL
+          AND NOT EXISTS (
+              SELECT 1 FROM warehouse_inventory wi
+              WHERE wi.bodega_id = tmp.bodega_id
+                AND wi.part_id = tmp.part_id
+                AND wi.warehouse_location = tmp.warehouse_location
+          )
+    """)
+    matched_inserted = cur.rowcount
+
+    # --- Update existing seller listings ---
+    cur.execute("""
+        UPDATE warehouse_inventory wi
+        SET
+            price = tmp.price,
+            stock_quantity = tmp.stock_quantity,
+            seller_part_name = tmp.seller_part_name,
+            seller_category = tmp.seller_category,
+            user_id = tmp.user_id,
+            currency = tmp.currency,
+            updated_at = NOW()
+        FROM tmp_wi tmp
+        WHERE wi.bodega_id = tmp.bodega_id
+          AND wi.seller_part_number = tmp.seller_part_number
+          AND wi.warehouse_location = tmp.warehouse_location
+          AND tmp.part_id IS NULL
+    """)
+    seller_updated = cur.rowcount
+
+    # --- Insert new seller listings ---
+    cur.execute("""
+        INSERT INTO warehouse_inventory (
+            user_id, part_id, seller_part_number, seller_part_name,
+            seller_category, tenant_inventory_id, price, stock_quantity,
+            min_order_quantity, warehouse_location, bodega_id, currency, updated_at
+        )
+        SELECT
+            user_id, part_id, seller_part_number, seller_part_name,
+            seller_category, tenant_inventory_id, price, stock_quantity,
+            min_order_quantity, warehouse_location, bodega_id, currency, NOW()
+        FROM tmp_wi tmp
+        WHERE part_id IS NULL
+          AND NOT EXISTS (
+              SELECT 1 FROM warehouse_inventory wi
+              WHERE wi.bodega_id = tmp.bodega_id
+                AND wi.seller_part_number = tmp.seller_part_number
+                AND wi.warehouse_location = tmp.warehouse_location
+          )
+    """)
+    seller_inserted = cur.rowcount
+
+    matched_upserted = matched_updated + matched_inserted
+    seller_upserted = seller_updated + seller_inserted
+
+    master_conn.commit()
+    cur.close()
+
+    print(f"\n✓ Done!")
+    print(f"  OEM matched upserted: {matched_upserted:,}")
+    print(f"  Seller listings upserted: {seller_upserted:,}")
+    print(f"  Total: {matched_upserted + seller_upserted:,}")
+
+
+def main():
+    parser = argparse.ArgumentParser(description='Sync tenant inventory to marketplace')
+    parser.add_argument('--tenant', type=int, required=True, help='Tenant ID')
+    parser.add_argument('--bodega', type=int, required=True, help='Bodega ID in master DB')
+    parser.add_argument('--branch', type=int, default=1, help='Branch ID filter (default all)')
+    args = parser.parse_args()
+
+    start = time.time()
+    print(f"=== Sync tenant {args.tenant} → bodega {args.bodega} ===\n")
+
+    master_conn = get_master_conn()
+    tenant_conn = get_tenant_conn(args.tenant)
+
+    try:
+        oem_map, cross_map = load_catalog_maps(master_conn)
+        items = read_tenant_inventory(tenant_conn, args.branch)
+        matched, seller = classify_items(items, oem_map, cross_map)
+        sync_to_warehouse(master_conn, args.bodega, matched, seller)
+    finally:
+        tenant_conn.close()
+        master_conn.close()
+
+    elapsed = time.time() - start
+    print(f"\nElapsed: {elapsed:.1f}s")
+
+
+if __name__ == '__main__':
+    main()
diff --git a/scripts/sync_estrada_to_marketplace.py b/scripts/sync_estrada_to_marketplace.py
new file mode 100644
index 0000000..a34b04b
--- /dev/null
+++ b/scripts/sync_estrada_to_marketplace.py
@@ -0,0 +1,82 @@
+#!/usr/bin/env python3
+"""
+Sync Strada inventory to marketplace warehouse_inventory.
+Matches by OEM part_number and cross-references.
+"""
+import os, sys, io
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'pos'))
+from tenant_db import get_tenant_conn, get_master_conn
+
+BODEGA_ID = 7
+USER_ID = 1  # admin user in master DB
+CURRENCY = 'MXN'
+
+def main():
+    tenant_conn = get_tenant_conn(28)
+    tenant_cur = tenant_conn.cursor()
+    
+    # Get active inventory with stock
+    tenant_cur.execute("""
+        SELECT i.id, i.part_number, i.price_1, i.cost, COALESCE(iss.stock, 0) as stock
+        FROM inventory i
+        LEFT JOIN inventory_stock_summary iss ON iss.inventory_id = i.id
+        WHERE i.is_active = true
+    """)
+    items = {r[0]: {'pn': r[1], 'price': r[2], 'cost': r[3], 'stock': r[4]} for r in tenant_cur.fetchall()}
+    print(f"Active inventory: {len(items)}")
+    
+    tenant_cur.close()
+    tenant_conn.close()
+    
+    # Get catalog mappings from master
+    master = get_master_conn()
+    master_cur = master.cursor()
+    
+    master_cur.execute("SELECT id_part, oem_part_number FROM parts WHERE oem_part_number IS NOT NULL")
+    oem_map = {r[1]: r[0] for r in master_cur.fetchall()}
+    
+    master_cur.execute("SELECT part_id, cross_reference_number FROM part_cross_references")
+    cross_map = {r[1]: r[0] for r in master_cur.fetchall()}
+    
+    print(f"OEM parts: {len(oem_map)}, Cross-references: {len(cross_map)}")
+    
+    # Build match list
+    matched = []
+    seen_parts = set()
+    for item_id, data in items.items():
+        pn = data['pn']
+        raw = pn.split('-', 1)[1] if '-' in pn else pn
+        
+        part_id = oem_map.get(raw) or oem_map.get(pn) or cross_map.get(raw) or cross_map.get(pn)
+        if part_id and part_id not in seen_parts:
+            seen_parts.add(part_id)
+            price = data['price'] or data['cost'] or 0
+            stock = data['stock'] or 0
+            matched.append((USER_ID, part_id, price, stock, 1, 'Principal', BODEGA_ID, CURRENCY))
+    
+    print(f"Matched items: {len(matched)}")
+    
+    if not matched:
+        print("Nothing to sync")
+        return
+    
+    # Bulk insert via COPY
+    csv_buffer = io.StringIO()
+    for row in matched:
+        csv_buffer.write(','.join(str(c) for c in row) + '\n')
+    csv_buffer.seek(0)
+    
+    master_cur.copy_expert(
+        """COPY warehouse_inventory (user_id, part_id, price, stock_quantity, min_order_quantity, warehouse_location, bodega_id, currency)
+        FROM STDIN WITH (FORMAT CSV)""",
+        csv_buffer
+    )
+    
+    master.commit()
+    master_cur.close()
+    master.close()
+    
+    print(f"Synced {len(matched)} items to warehouse_inventory")
+
+if __name__ == '__main__':
+    main()
diff --git a/scripts/video_intro_inventario_pos.md b/scripts/video_intro_inventario_pos.md
new file mode 100644
index 0000000..e52da26
--- /dev/null
+++ b/scripts/video_intro_inventario_pos.md
@@ -0,0 +1,262 @@
+# Guion de Video — Introducción a Nexus POS
+## Módulos: Inventario + Punto de Venta
+**Duración estimada:** 4–5 minutos  
+**Formato:** Screen recording con voz en off  
+**Resolución:** 1920×1080 (16:9)  
+**Público:** Dueños de refaccionarias, mostradores, administradores
+
+---
+
+## ESCENA 0 — INTRO / HOOK (0:00–0:25)
+
+**Visual:**
+- Fade in desde negro.
+- Logo de Nexus Autoparts centrado.
+- Transición rápida: montaje de 3–4 tomas del sistema en acción (búsqueda de pieza, ticket imprimiéndose, gráfica de ventas).
+
+**Narración (voz en off, tono energético):**
+> "¿Todavía controlas tu inventario con hojas de Excel o cuadernos?  
+> Pierdes piezas, no sabes qué te queda en bodega y en la caja nunca cuadra.  
+> Te presento Nexus POS: el sistema diseñado específicamente para refaccionarias.  
+> En los próximos minutos vas a ver cómo administrar tu inventario y vender desde cualquier dispositivo."
+
+**Nota técnica:**
+- Música de fondo: upbeat corporativo, volumen bajo durante la narración.
+- Lower third: "Nexus POS — Inventario & Punto de Venta".
+
+---
+
+## ESCENA 1 — INVENTARIO: PANEL GENERAL (0:25–0:55)
+
+**Visual:**
+- Login rápido (no mostrar credenciales reales, usar cuenta demo).
+- Entrar al módulo **Inventario**.
+- Mostrar el dashboard de inventario: badges superiores (Total de piezas, Stock bajo, Sin stock, Valor total).
+
+**Narración:**
+> "Empecemos con el corazón de tu negocio: el inventario.  
+> Desde el panel principal tienes el pulso completo de tu refaccionaria.  
+> Cuántas piezas tienes, cuáles están por acabarse y el valor total de tu stock… todo al instante."
+
+**Nota técnica:**
+- Usar transición suave (slide lateral) al entrar al módulo.
+- Zoom sutil sobre los badges superiores para enfatizar los números.
+
+---
+
+## ESCENA 2 — INVENTARIO: ALTA RÁPIDA DE PRODUCTO (0:55–1:35)
+
+**Visual:**
+- Clic en "Nuevo Artículo".
+- Llenar formulario: Número de parte, nombre, marca, stock inicial, precios.
+- Destacar el campo **Código de barras** (se genera automáticamente).
+- Guardar. Aparece toast de éxito: "Artículo creado".
+
+**Narración:**
+> "Dar de alta una pieza es cosa de segundos.  
+> Capturas el número de parte, la descripción, la marca… y el sistema genera automáticamente un código de barras.  
+> Tú decides el stock inicial y hasta tres niveles de precio.  
+> Guardas… y listo, la pieza ya está en el sistema."
+
+**Nota técnica:**
+- Escribir rápido pero legible (o usar autofill demo).
+- Resaltar con cursor el código de barras generado.
+- Toast de éxito debe ser visible al menos 1.5 segundos.
+
+---
+
+## ESCENA 3 — INVENTARIO: COMPATIBILIDAD CON VEHÍCULOS (1:35–2:05)
+
+**Visual:**
+- Abrir la ficha del artículo recién creado.
+- Clic en pestaña **"Compatibilidad"**.
+- Clic en "Auto-Match con IA (QWEN)".
+- Mostrar spinner de carga breve (3–4 segundos), luego la lista de vehículos aparece (marca, modelo, año, motor).
+- Señalar la etiqueta "IA" en color naranja/azul.
+
+**Narración:**
+> "Aquí viene lo potente.  
+> No sabes exactamente a qué carros le queda esta pieza… pero la inteligencia artificial sí.  
+> Con un solo clic, el sistema busca en segundos todos los vehículos compatibles: marca, modelo, año y motor.  
+> Todo se guarda automáticamente para que tu mostrador lo consulte al instante."
+
+**Nota técnica:**
+- Usar una pieza con resultados claros (ejemplo: filtro de aceite PH8A o bujía BKR5EYA).
+- Si el auto-match tarda mucho en producción, usar un clip grabado previamente o acelerar 2×.
+- Enfatizar la etiqueta "IA" con un círculo o flecha.
+
+---
+
+## ESCENA 4 — INVENTARIO: ENTRADAS, TRASPASOS Y AJUSTES (2:05–2:40)
+
+**Visual:**
+- Volver al listado de inventario.
+- Clic en "Entrada" sobre una fila de stock (simular compra a proveedor: cantidad 10, costo $150).
+- Cambiar a pestaña **"Traspasos"**, mostrar lista de movimientos entre sucursales.
+- Cambiar a pestaña **"Ajustes"**, mostrar ajuste de inventario.
+
+**Narración:**
+> "El inventario se mueve constantemente.  
+> Recibiste mercancía del proveedor — registras la entrada en un clic.  
+> Necesitas enviar 5 piezas a la otra sucursal — traspaso directo.  
+> Y si encuentras una diferencia física contra el sistema, haces un ajuste con comentario.  
+> Todo queda auditado: quién, cuándo y por qué."
+
+**Nota técnica:**
+- Usar transición rápida entre pestañas (corte duro o fade).
+- Mostrar al menos 2–3 filas en cada tabla para que se vea real.
+
+---
+
+## ESCENA 5 — POS: APERTURA DE CAJA (2:40–3:05)
+
+**Visual:**
+- Transición al módulo **Punto de Venta**.
+- Mostrar barra superior: "Sin caja abierta".
+- Clic en "Abrir Caja", llenar número de caja y monto inicial ($500).
+- Guardar. La barra cambia a "Caja #1 abierta".
+
+**Narración:**
+> "Pasemos a la venta.  
+> Antes de vender, abres tu caja: le pones número y efectivo inicial.  
+> El sistema no te deja facturar sin caja abierta, así que siempre hay control.  
+> Una vez abierta, la barra te recuerda en todo momento en qué caja estás."
+
+**Nota técnica:**
+- Transición limpia: slide desde abajo o fade.
+- Close-up en la barra de estado antes y después de abrir la caja.
+
+---
+
+## ESCENA 6 — POS: VENTA RÁPIDA (3:05–3:45)
+
+**Visual:**
+- Buscar producto por número de parte (escanear o teclear).
+- El producto aparece en el carrito con imagen, descripción y precio.
+- Agregar una segunda pieza al carrito.
+- Clic en **"Cobrar"**.
+- Modal de pago: mostrar total, cliente, descuento.
+- Dividir pago: $200 efectivo, resto transferencia.
+- Clic "Finalizar Venta". Ticket/recibo aparece en pantalla.
+
+**Narración:**
+> "Vender es tan simple como buscar la pieza… puede ser por número de parte o escaneando el código de barras.  
+> El carrito muestra todo claro: qué vendes, cuánto cuesta y cuánto llevas.  
+> Al cobrar, aceptas efectivo, transferencia, tarjeta… o una combinación de todo.  
+> Finalizas… y el ticket se genera al instante para el cliente."
+
+**Nota técnica:**
+- Usar búsqueda rápida (autocomplete visible).
+- Animar el producto "volando" al carrito (si el sistema lo tiene) o simple highlight.
+- Mostrar claramente el ticket final con logo y datos de la empresa.
+
+---
+
+## ESCENA 7 — POS: CORTE Z Y CIERRE DE CAJA (3:45–4:10)
+
+**Visual:**
+- Clic en "Corte Z" en la barra de estado.
+- Modal aparece con resumen: ventas por método de pago, entradas, salidas, efectivo esperado.
+- Ingresar efectivo real en caja ($1,247.50).
+- El sistema calcula diferencia automáticamente.
+- Clic "Cerrar Caja". Confirmación.
+
+**Narración:**
+> "Al final del turno, haces tu corte.  
+> El sistema te dice exactamente cuánto deberías tener en caja: ventas, entradas, salidas… todo desglosado.  
+> Tú cuentas el efectivo real, lo capturas y si hay diferencia, la ves inmediatamente.  
+> Cierras caja y listo: turno terminado sin sorpresas."
+
+**Nota técnica:**
+- Hacer scroll dentro del modal para mostrar todos los totales.
+- Enfatizar el número de "diferencia" (positivo o negativo) con color.
+
+---
+
+## ESCENA 8 — CIERRE / CALL TO ACTION (4:10–4:45)
+
+**Visual:**
+- Volver al dashboard principal.
+- Montaje rápido de pantallas vistas: inventario, auto-match, carrito, corte Z.
+- Fade a pantalla final: datos de contacto / sitio web / QR.
+
+**Narración (tono inspirador):**
+> "Desde la primera pieza que entra hasta el último ticket del día, Nexus POS te acompaña.  
+- Inventario inteligente con IA, punto de venta rápido y cortes de caja que sí cuadran.  
+- Todo en un solo sistema, accesible desde tu computadora, tablet o celular.  
+- Agenda tu demo hoy y lleva tu refaccionaria al siguiente nivel."
+
+**Texto en pantalla (overlay):**
+- "¿Listo para modernizar tu refaccionaria?"
+- Botón/CTA: "Agenda tu demo gratis"
+- Web: nexusautoparts.com.mx
+- WhatsApp: [número]
+
+**Nota técnica:**
+- Música sube de volumen en la pantalla final.
+- Logo + CTA deben permanecer 5–7 segundos.
+
+---
+
+## CHECKLIST TÉCNICO PARA GRABACIÓN
+
+| Ítem | Especificación |
+|------|----------------|
+| **Resolución** | 1920×1080 mínimo |
+| **FPS** | 30 fps (60 fps opcional para animaciones suaves) |
+| **Audio** | Voz en off clara, sin eco. Música royalty-free bajo |
+| **Cursor** | Usar cursor grande y resaltado (Halo o similar) |
+| **Transiciones** | Slide lateral 0.3s o fade 0.2s. Nada exagerado |
+| **Datos demo** | Usar piezas reales: BKR5EYA, PH8A, BP6ES. Cliente: "Juan Pérez" |
+| **Cuenta** | Usar usuario demo; NUNCA mostrar contraseñas reales |
+| **Limpieza** | Cerrar notificaciones del OS antes de grabar |
+
+---
+
+## DATOS DE PRUEBA RECOMENDADOS PARA LA GRABACIÓN
+
+### Producto 1 (alta en vivo)
+- Número de parte: `PH8A`
+- Nombre: `Filtro de aceite Motorcraft`
+- Marca: `Motorcraft`
+- Stock inicial: `12`
+- Precio 1: `$185.00`
+
+### Producto 2 (venta rápida)
+- Número de parte: `BKR5EYA`
+- Nombre: `Bujía NGK`
+- Precio: `$145.00`
+
+### Cliente demo
+- Nombre: `Juan Pérez`
+- Teléfono: `555-123-4567`
+
+### Caja
+- Caja #1
+- Apertura: `$500.00`
+- Cierre: `$1,247.50`
+
+---
+
+## NOTAS POST-PRODUCCIÓN
+
+1. **Subtítulos:** Agregar subtítulos en español (accesibilidad + redes sociales sin audio).
+2. **Capítulos:** YouTube chapters recomendados:
+   - 0:00 Intro
+   - 0:25 Inventario
+   - 0:55 Alta de producto
+   - 1:35 Compatibilidad con IA
+   - 2:05 Movimientos de inventario
+   - 2:40 Punto de Venta
+   - 3:05 Venta rápida
+   - 3:45 Corte de caja
+   - 4:10 Demo y contacto
+3. **Thumbnail:** Split screen — mitad inventario, mitad POS. Texto: "Control total de tu refaccionaria".
+4. **Formatos de exportación:**
+   - MP4 H.264 (YouTube / web)
+   - Vertical 9:16 recorte para Reels/TikTok (60 seg version)
+
+---
+
+*Guion generado para Nexus Autoparts — Módulos Inventario & POS*  
+*Versión 1.0 — 2026-05-18*