feat: Implement conversation mute and favorite features with UI integration and state management.

lib/features/messaging/data/messaging_repository.dart

@@ -186,6 +186,38 @@ class MessagingRepository {
       );
     }
   }
+
+  /// Toggle mute status for a conversation
+  Future<void> toggleMute(String conversationId, bool muted) async {
+    try {
+      await _dio.patch(
+        '${ApiConstants.conversations}/$conversationId/mute',
+        data: {'muted': muted},
+      );
+    } on DioException catch (e) {
+      if (e.error is ApiException) throw e.error as ApiException;
+      throw ApiException(
+        message: e.message ?? 'Failed to toggle mute',
+        statusCode: e.response?.statusCode,
+      );
+    }
+  }
+
+  /// Toggle favorite status for a conversation
+  Future<void> toggleFavorite(String conversationId, bool favorited) async {
+    try {
+      await _dio.patch(
+        '${ApiConstants.conversations}/$conversationId/favorite',
+        data: {'favorited': favorited},
+      );
+    } on DioException catch (e) {
+      if (e.error is ApiException) throw e.error as ApiException;
+      throw ApiException(
+        message: e.message ?? 'Failed to toggle favorite',
+        statusCode: e.response?.statusCode,
+      );
+    }
+  }
 }
 
 final messagingRepositoryProvider = Provider<MessagingRepository>((ref) {