add

frontend/asset_assistant/lib/pages/country_add_page.dart

@@ -14,7 +14,7 @@ class _AddCountryPageState extends State<AddCountryPage> {
   // 输入控制器 - 新增国旗控制器
   final TextEditingController _nameController = TextEditingController();
   final TextEditingController _codeController = TextEditingController();
-  final TextEditingController _flagController = TextEditingController(); // 新增
+  final TextEditingController _flagController = TextEditingController();
 
   // 加载状态
   bool _isLoading = false;