add favorite

lib/core/constants/api_constants.dart

@@ -145,6 +145,25 @@ class ApiConstants {
   /// Body: { "method": "whatsapp|telegram|sms" }
   static const String shareReferral = '/loyalty/referral/share';
 
+  // ============================================================================
+  // Favorites/Wishlist Endpoints (Frappe ERPNext)
+  // ============================================================================
+
+  /// Get favorite/wishlist items for current user
+  /// POST /api/method/building_material.building_material.api.item_wishlist.get_list
+  /// Body: { "limit_start": 0, "limit_page_length": 0 }
+  static const String getFavorites = '/building_material.building_material.api.item_wishlist.get_list';
+
+  /// Add item to wishlist
+  /// POST /api/method/building_material.building_material.api.item_wishlist.add_to_wishlist
+  /// Body: { "item_id": "GIB20 G04" }
+  static const String addToFavorites = '/building_material.building_material.api.item_wishlist.add_to_wishlist';
+
+  /// Remove item from wishlist
+  /// POST /api/method/building_material.building_material.api.item_wishlist.remove_from_wishlist
+  /// Body: { "item_id": "GIB20 G04" }
+  static const String removeFromFavorites = '/building_material.building_material.api.item_wishlist.remove_from_wishlist';
+
   // ============================================================================
   // Product Endpoints
   // ============================================================================

lib/core/constants/storage_constants.dart

@@ -51,8 +51,8 @@ class HiveBoxNames {
   /// Address book
   static const String addressBox = 'address_box';
 
-  /// Favorite products
-  static const String favoriteBox = 'favorite_box';
+  /// Favorite products data (cached from wishlist API)
+  static const String favoriteProductsBox = 'favorite_products_box';
 
   /// Offline request queue for failed API calls
   static const String offlineQueueBox = 'offline_queue_box';
@@ -72,7 +72,7 @@ class HiveBoxNames {
     syncStateBox,
     notificationBox,
     addressBox,
-    favoriteBox,
+    favoriteProductsBox,
     offlineQueueBox,
   ];
 }

lib/core/database/hive_initializer.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/foundation.dart';
+import 'package:hive_ce_flutter/hive_flutter.dart';
 
 import 'package:worker/core/database/database_manager.dart';
 import 'package:worker/core/database/hive_service.dart';
@@ -53,6 +54,9 @@ class HiveInitializer {
 
       final dbManager = DatabaseManager();
 
+      // Migration: Delete old favoriteBox (deprecated, replaced with favoriteProductsBox)
+      await _deleteLegacyFavoriteBox(verbose);
+
       // Clear expired cache on app start
       await dbManager.clearExpiredCache();
 
@@ -97,6 +101,33 @@ class HiveInitializer {
     await hiveService.clearUserData();
   }
 
+  /// Delete legacy favoriteBox (migration helper)
+  ///
+  /// The old favoriteBox stored FavoriteModel which has been removed.
+  /// This method deletes the old box to prevent typeId errors.
+  static Future<void> _deleteLegacyFavoriteBox(bool verbose) async {
+    try {
+      const legacyBoxName = 'favorite_box';
+
+      // Check if the old box exists
+      if (await Hive.boxExists(legacyBoxName)) {
+        if (verbose) {
+          debugPrint('HiveInitializer: Deleting legacy favoriteBox...');
+        }
+
+        // Delete the box from disk
+        await Hive.deleteBoxFromDisk(legacyBoxName);
+
+        if (verbose) {
+          debugPrint('HiveInitializer: Legacy favoriteBox deleted successfully');
+        }
+      }
+    } catch (e) {
+      debugPrint('HiveInitializer: Error deleting legacy favoriteBox: $e');
+      // Don't rethrow - this is just a cleanup operation
+    }
+  }
+
   /// Get database statistics
   ///
   /// Returns statistics about all Hive boxes.

lib/core/database/hive_service.dart

@@ -156,8 +156,8 @@ class HiveService {
         // Notification box (non-sensitive)
         Hive.openBox<dynamic>(HiveBoxNames.notificationBox),
 
-        // Favorites box (non-sensitive)
-        Hive.openBox<dynamic>(HiveBoxNames.favoriteBox),
+        // Favorite products box (non-sensitive) - caches Product entities from wishlist API
+        Hive.openBox<dynamic>(HiveBoxNames.favoriteProductsBox),
       ]);
 
       // Open potentially encrypted boxes (sensitive data)