feat: implement multiple saved addresses with modal selector in checkout

- Add AddressController with full CRUD API for saved addresses
- Implement address management UI in My Account > Addresses
- Add modal-based address selector in checkout (Tokopedia-style)
- Hide checkout forms when saved address is selected
- Add search functionality in address modal
- Auto-select default addresses on page load
- Fix variable products to show 'Select Options' instead of 'Add to Cart'
- Add admin toggle for multiple addresses feature
- Clean up debug logs and fix TypeScript errors

includes/Frontend/CartController.php

@@ -25,7 +25,6 @@ class CartController {
             // Check if this is a cart endpoint
             $request_uri = $_SERVER['REQUEST_URI'] ?? '';
             if (strpos($request_uri, '/woonoow/v1/cart') !== false) {
-                error_log('WooNooW Cart: Bypassing authentication for cart endpoint');
                 return true; // Allow access
             }
             
@@ -37,7 +36,6 @@ class CartController {
      * Register REST API routes
      */
     public static function register_routes() {
-        error_log('WooNooW CartController::register_routes() START');
         $namespace = 'woonoow/v1';
         
         // Get cart
@@ -46,7 +44,6 @@ class CartController {
             'callback'            => [__CLASS__, 'get_cart'],
             'permission_callback' => '__return_true',
         ]);
-        error_log('WooNooW CartController: GET /cart registered: ' . ($result ? 'SUCCESS' : 'FAILED'));
         
         // Add to cart
         $result = register_rest_route($namespace, '/cart/add', [
@@ -73,7 +70,6 @@ class CartController {
                 ],
             ],
         ]);
-        error_log('WooNooW CartController: POST /cart/add registered: ' . ($result ? 'SUCCESS' : 'FAILED'));
         
         // Update cart item
         register_rest_route($namespace, '/cart/update', [