feat(pos): chatbot busca en inventario local + catalogo TecDoc

El chatbot ahora busca primero en el inventario local del tenant
y luego en el catalogo TecDoc. Resultados muestran badge:
- Verde "MI INVENTARIO" para partes locales
- Azul "CATALOGO" para partes del catalogo TecDoc
Busqueda local funciona en español e inglés.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pos/blueprints/chat_bp.py

@@ -59,14 +59,30 @@ def chat():
             if len(part_words) >= 3:
                 effective_query = part_words
 
-        if effective_query and master and tenant:
+        if effective_query and tenant:
+            # First: search local inventory
             try:
-                results = catalog_service.smart_search(
-                    master, effective_query, tenant, branch_id, limit=10
-                )
-                search_results = results if results else []
+                local_results = _search_local_inventory(tenant, effective_query, search_query or '', branch_id)
+                if local_results:
+                    search_results.extend(local_results)
             except Exception:
-                pass  # search failure is non-fatal
+                pass
+
+            # Then: search TecDoc catalog
+            if master:
+                try:
+                    catalog_results = catalog_service.smart_search(
+                        master, effective_query, tenant, branch_id, limit=10
+                    )
+                    if catalog_results:
+                        # Mark as catalog results and avoid duplicates
+                        local_parts = {r.get('part_number', '') for r in search_results}
+                        for cr in catalog_results:
+                            if cr.get('oem_part_number', '') not in local_parts:
+                                cr['source'] = 'catalog'
+                                search_results.append(cr)
+                except Exception:
+                    pass  # search failure is non-fatal
 
     except Exception:
         pass  # DB failure is non-fatal for chat
@@ -159,3 +175,61 @@ def _resolve_vehicle(master_conn, vehicle):
         cur.close()
 
     return result
+
+
+def _search_local_inventory(tenant_conn, query_en, query_es, branch_id):
+    """Search tenant's local inventory by part name/number in both English and Spanish."""
+    cur = tenant_conn.cursor()
+    results = []
+    try:
+        # Search by part_number, name, or brand — try both English and Spanish terms
+        terms = set()
+        terms.add(query_en)
+        if query_es:
+            terms.add(query_es)
+
+        where_parts = []
+        params = []
+        for term in terms:
+            if not term:
+                continue
+            where_parts.append("(i.part_number ILIKE %s OR i.name ILIKE %s OR i.brand ILIKE %s)")
+            params.extend([f'%{term}%', f'%{term}%', f'%{term}%'])
+
+        if not where_parts:
+            return []
+
+        where = " OR ".join(where_parts)
+        if branch_id:
+            where = f"({where}) AND i.branch_id = %s"
+            params.append(branch_id)
+
+        cur.execute(f"""
+            SELECT i.id, i.part_number, i.name, i.brand, i.price_1, i.price_2, i.price_3, i.cost,
+                   COALESCE((SELECT SUM(quantity) FROM inventory_operations WHERE inventory_id = i.id), 0) as stock
+            FROM inventory i
+            WHERE i.is_active = true AND ({where})
+            ORDER BY i.name
+            LIMIT 10
+        """, params)
+
+        for r in cur.fetchall():
+            results.append({
+                'source': 'local',
+                'inventory_id': r[0],
+                'part_number': r[1],
+                'oem_part_number': r[1],
+                'name_part': r[2],
+                'brand': r[3],
+                'price_1': float(r[4]) if r[4] else 0,
+                'price_2': float(r[5]) if r[5] else 0,
+                'price_3': float(r[6]) if r[6] else 0,
+                'cost': float(r[7]) if r[7] else 0,
+                'local_stock': r[8],
+            })
+    except Exception:
+        pass
+    finally:
+        cur.close()
+
+    return results

pos/static/js/chat.js

@@ -191,16 +191,21 @@
       const card = document.createElement('div');
       card.className = 'chat-part-card';
 
+      const isLocal = p.source === 'local';
       const stockQty = p.local_stock || 0;
       const stockClass = stockQty > 0 ? 'in-stock' : '';
       const stockText = stockQty > 0 ? (stockQty + ' en stock') : 'Sin stock local';
       const name = p.name_es || p.name_part || '';
-      const partNum = p.oem_part_number || '';
+      const partNum = p.oem_part_number || p.part_number || '';
+      const brand = p.brand || '';
       const priceText = p.price_1 ? ('$' + parseFloat(p.price_1).toFixed(2)) : '';
+      const sourceTag = isLocal
+        ? '<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>';
 
       card.innerHTML =
-        '<div class="part-number">' + esc(partNum) + (priceText ? ' &mdash; ' + priceText : '') + '</div>' +
-        '<div class="part-name">' + esc(name) + '</div>' +
+        '<div class="part-number">' + esc(partNum) + sourceTag + (priceText ? ' &mdash; ' + priceText : '') + '</div>' +
+        '<div class="part-name">' + esc(name) + (brand ? ' <span style="color:var(--color-text-muted);">(' + esc(brand) + ')</span>' : '') + '</div>' +
         '<div class="part-stock ' + stockClass + '">' + esc(stockText) + '</div>';
 
       // Click to open detail (if catalog page has a detail function)