add dropdown

lib/features/warehouse/presentation/pages/warehouse_selection_page.dart

@@ -26,9 +26,11 @@ class _WarehouseSelectionPageState
   @override
   void initState() {
     super.initState();
-    // Load warehouses when page is first created
+    // Load warehouses and sync users when page is first created
     Future.microtask(() {
       ref.read(warehouseProvider.notifier).loadWarehouses();
+      // Sync users from API and save to local storage
+      ref.read(usersProvider.notifier).syncUsers();
     });
   }