Opción C: Vinculación híbrida de inventario local con vehículos

- Nueva tabla inventory_vehicle_compat (v3.1)
- Motor inventory_vehicle_compat.py: auto-match + gestión manual
- catalog_service.get_parts_local() ahora incluye piezas locales vinculadas
- inventory_bp: auto-match en create/update + endpoints REST /vehicles
- Frontend catalog.js: badge 'Stock Local' para piezas nativas del tenant
- Frontend inventory.js: panel de vehículos compatibles con auto-match
- Tests: test_compatibility.py (9/9 pasan)

Piezas locales aparecen en navegación por vehículo aunque no estén en TecDoc.
Auto-match busca part_number en parts/aftermarket_parts y copia MYEs compatibles.

pos/services/catalog_service.py

@@ -629,18 +629,42 @@ def get_parts_for_nexpart_triple(master_conn, mye_id, group_slug, subgroup_slug,
         .get(subgroup_slug, {})
         .get(part_type_slug, [])
     )
-    if not part_ids:
-        return {
-            'data': [],
-            'pagination': _pagination(page, per_page, 0),
-            'mode': 'local',
-        }
-    return get_parts_local(
+    result = get_parts_local(
         master_conn, mye_id=None, group_id=None,
         tenant_conn=tenant_conn, branch_id=branch_id,
         page=page, per_page=per_page,
         oem_part_ids=part_ids,
     )
+    # Inject local inventory items linked to this vehicle
+    # (get_parts_local with oem_part_ids skips mye_id, so we call it separately)
+    if tenant_conn and mye_id:
+        from services.inventory_vehicle_compat import get_inventory_by_vehicle
+        local_rows = get_inventory_by_vehicle(tenant_conn, master_conn, mye_id, branch_id)
+        for lr in local_rows:
+            inv_id, pn, name, brand, p1, p2, p3, img, desc, stock = lr
+            # Only include if name roughly matches the Nexpart part_type
+            if part_type_slug and part_type_slug.lower() not in (name or '').lower():
+                continue
+            result['data'].append({
+                'id_part': f'inv:{inv_id}',
+                'id_aftermarket': None,
+                'oem_part_number': None,
+                'part_number': pn,
+                'name': name,
+                'description': desc,
+                'image_url': img,
+                'manufacturer': brand,
+                'priority_tier': 1,
+                'local_stock': int(stock) if stock else 0,
+                'local_price': float(p1) if p1 else None,
+                'bodega_count': 0,
+                'warehouse_stock': 0,
+                'warehouse_price': None,
+                'in_stock_network': False,
+                'price_usd': None,
+                'source': 'local_inventory',
+            })
+    return result
 
 
 def get_nexpart_part_types_for_vehicle(master_conn, mye_id, group_slug, subgroup_slug):
@@ -983,6 +1007,8 @@ def get_parts_local(master_conn, mye_id, group_id, tenant_conn, branch_id,
     local_map = _get_local_stock_bulk(tenant_conn, branch_id, oem_numbers, result_oem_ids)
 
     items = []
+    seen_part_numbers = set()
+
     for r in rows:
         aft_id = r[0]
         oem_part_id = r[1]
@@ -1003,6 +1029,10 @@ def get_parts_local(master_conn, mye_id, group_id, tenant_conn, branch_id,
         local = local_map.get(oem_number) or local_map.get(f'cat:{oem_part_id}')
         image_url = (local.get('image_url') if local else None) or oem_image
 
+        part_number = aft_number or oem_number
+        if part_number:
+            seen_part_numbers.add(part_number.upper())
+
         items.append({
             # Keep fields compatible with OEM mode output so the frontend
             # can render with minimal branching.
@@ -1022,8 +1052,39 @@ def get_parts_local(master_conn, mye_id, group_id, tenant_conn, branch_id,
             'warehouse_price': float(warehouse_price) if warehouse_price is not None else None,
             'in_stock_network': bodega_count > 0,
             'price_usd': float(price_usd) if price_usd is not None else None,
+            'source': 'aftermarket',
         })
 
+    # ─── Inject local inventory items linked to this vehicle ──────────────────
+    if mye_id and tenant_conn:
+        from services.inventory_vehicle_compat import get_inventory_by_vehicle
+        local_rows = get_inventory_by_vehicle(tenant_conn, master_conn, mye_id, branch_id)
+        for lr in local_rows:
+            inv_id, pn, name, brand, p1, p2, p3, img, desc, stock = lr
+            if pn and pn.upper() in seen_part_numbers:
+                continue  # deduplicate: already shown via aftermarket match
+            seen_part_numbers.add(pn.upper() if pn else '')
+            items.append({
+                'id_part': f'inv:{inv_id}',
+                'id_aftermarket': None,
+                'oem_part_number': None,
+                'part_number': pn,
+                'name': name,
+                'description': desc,
+                'image_url': img,
+                'manufacturer': brand,
+                'priority_tier': 1,  # treat as tier 1 since it's local stock
+                'local_stock': int(stock) if stock else 0,
+                'local_price': float(p1) if p1 else None,
+                'bodega_count': 0,
+                'warehouse_stock': 0,
+                'warehouse_price': None,
+                'in_stock_network': False,
+                'price_usd': None,
+                'source': 'local_inventory',
+            })
+            total += 1
+
     return {'data': items, 'pagination': _pagination(page, per_page, total), 'mode': 'local'}