feat: rebuild Catalog with collapsible tree + product table + photo upload

- Left panel: collapsible tree (Country → City → District → Category → Subcategory)
  - Quick-add buttons: + City, + District, + Category, + Subcategory
  - Delete buttons with confirmation on all nodes
  - Product count badges on each node
  - Click node to filter right panel
- Right panel: Product table with Photo, Name, Category, Subcategory, Price, Stock
  - Edit (✎) and Delete (✕) buttons per row
  - Add Product modal with all fields
- Product edit form: name, price, stock, description, category, subcategory (JS filtered),
  photo_url/hidden_photo_url (URL or file upload), hidden_coordinates, hidden_description, private_data
- Multer file upload for photos stored in /uploads/
- Routes: add-city, add-district, product CRUD with photo upload
- Product JSON API for modal editing
- Responsive grid: tree (320px) + table (1fr)

src/admin/server.js

@@ -6,6 +6,7 @@ import logger from '../utils/logger.js';
 import { requireAuth, handleLogin, handleLogout, renderLogin } from './auth.js';
 import dashboardRouter from './routes/dashboard.js';
 import catalogRouter from './routes/catalog.js';
+import catalogProductsRouter from './routes/catalogProducts.js';
 import usersRouter from './routes/users.js';
 import productsRouter from './routes/products.js';
 import walletsRouter from './routes/wallets.js';
@@ -23,6 +24,7 @@ const app = express();
 app.use(cookieParser());
 app.use(express.urlencoded({ extended: true }));
 app.use('/admin/style.css', express.static(join(__dirname, 'public', 'style.css')));
+app.use('/uploads', express.static(join(__dirname, '..', '..', 'uploads')));
 
 app.get('/health', (req, res) => {
   res.json({ status: 'ok', uptime: process.uptime() });
@@ -39,6 +41,7 @@ app.use(requireAuth);
 
 app.use('/', dashboardRouter);
 app.use('/catalog', catalogRouter);
+app.use('/catalog', catalogProductsRouter);
 app.use('/users', usersRouter);
 app.use('/products', productsRouter);
 app.use('/wallets', walletsRouter);