feat: Fase 1-3 completas - precios proveedor, multi-sucursal, factura global

Fase 1: Lista de precios de proveedor
- Tabla supplier_catalog_prices en master DB
- Endpoints GET/POST/PUT/DELETE /supplier-catalog/prices
- Upload CSV/Excel de precios de proveedor
- Visualizacion de supplier_price en catalogo y POS

Fase 2: Multi-sucursal completo
- Migracion v4.0: inventory.branch_id=NULL, tabla inventory_stock
- Campos fiscales en branches (RFC, regimen, CP, serie CFDI, certificados)
- Trigger trg_update_inventory_stock para sincronizar stock por sucursal
- Backend config_bp.py con CRUD de sucursales fiscales
- Backend inventory_bp.py y pos_bp.py refactorizados para inventario compartido
- Backend invoicing_bp.py usa datos fiscales de la sucursal de la venta
- Frontend config.html/js con modal de sucursales expandido

Fase 3: Factura global mensual
- Migracion v4.1: tablas global_invoice_sales, sales.global_invoiced_at
- build_global_invoice_xml() con InformacionGlobal SAT-compliant
- Servicio global_invoice.py para agrupar ventas PUE <=000
- Endpoints POST/GET /global-invoice y /global-invoice/eligible-sales
- Frontend invoicing.html/js con boton y modal de factura global

pos/blueprints/catalog_bp.py

@@ -379,7 +379,7 @@ def parts():
         if use_nexpart_nav:
             result = catalog_service.get_parts_for_nexpart_triple(
                 master, mye_id, nexpart_group, nexpart_subgroup, nexpart_part_type,
-                tenant, branch_id, _page, _per_page,
+                tenant, branch_id, _page, _per_page, tenant_id=g.tenant_id,
             )
         elif mode == 'local':
             result = catalog_service.get_parts_local(
@@ -426,7 +426,7 @@ def search():
     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)
+        data = catalog_service.smart_search(master, q, tenant, branch_id, limit, mye_id, tenant_id=g.tenant_id)
         if allowed_brands:
             data = _filter_parts_by_allowed_brands(master, data, allowed_brands)
         return jsonify({'data': data, 'allowed_brands': allowed_brands or []})