feat(store): add two-level store categories for admin and partner open-store

Admin CRUD under stores menu; partner picks leaf category on create.
Default sync only inserts missing rows and never updates existing ones.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/admin-web/src/App.tsx

@@ -20,6 +20,7 @@ import CityPartnersPage from './pages/CityPartnersPage';
 import CityWarehousesPage from './pages/CityWarehousesPage';
 import FulfillmentProvidersPage from './pages/FulfillmentProvidersPage';
 import StoreMediaPage from './pages/StoreMediaPage';
+import StoreCategoriesPage from './pages/StoreCategoriesPage';
 import PromoCodesPage from './pages/PromoCodesPage';
 import PromoCodeDetailLayout from './pages/promo/PromoCodeDetailLayout';
 import PromoCodeDetailPage from './pages/promo/PromoCodeDetailPage';
@@ -69,6 +70,7 @@ export default function App() {
         <Route path="/products" element={<ProductsPage />} />
         <Route path="/product-detail-templates" element={<ProductDetailTemplatesPage />} />
         <Route path="/stores" element={<StoresPage />} />
+        <Route path="/store-categories" element={<StoreCategoriesPage />} />
         <Route path="/store-accounts" element={<StoreAccountsPage />} />
         <Route path="/store-media" element={<StoreMediaPage />} />
         <Route path="/resources" element={<ResourcesPage />} />