优化 demo

apps/im_app/lib/features/settings/view/theme_view.dart

@@ -16,32 +16,27 @@ class ThemeView extends ConsumerWidget {
     final current = ref.watch(themeViewModelProvider);
 
     return Scaffold(
-      appBar: AppBar(
-        title: const Text('主题'),
-      ),
+      appBar: AppBar(title: const Text('主题')),
       body: ListView(
         children: [
           const SettingsSectionHeader(title: '外观'),
           ThemeOptionTile(
             label: '跟随系统',
-            mode: ThemeMode.system,
-            current: current,
+            isSelected: current == ThemeMode.system,
             onTap: () => ref
                 .read(themeViewModelProvider.notifier)
                 .setMode(ThemeMode.system),
           ),
           ThemeOptionTile(
             label: '黑色模式',
-            mode: ThemeMode.dark,
-            current: current,
+            isSelected: current == ThemeMode.dark,
             onTap: () => ref
                 .read(themeViewModelProvider.notifier)
                 .setMode(ThemeMode.dark),
           ),
           ThemeOptionTile(
             label: '白色模式',
-            mode: ThemeMode.light,
-            current: current,
+            isSelected: current == ThemeMode.light,
             onTap: () => ref
                 .read(themeViewModelProvider.notifier)
                 .setMode(ThemeMode.light),

apps/im_app/lib/features/settings/view/widgets/theme_option_tile.dart

@@ -5,14 +5,13 @@ import '../../../../../core/ui/base/context_theme_ext.dart';
 /// 单个主题选项行
 ///
 /// 纯展示 + 事件透传，不感知任何 Provider。
-/// 由父级传入 [current] 判断选中状态，[onTap] 处理切换。
+/// 父级传入 [isSelected] 决定是否显示勾选图标，[onTap] 处理切换。
 ///
 /// 用法：
 /// ```dart
 /// ThemeOptionTile(
 ///   label: '黑色模式',
-///   mode: ThemeMode.dark,
-///   current: current,
+///   isSelected: current == ThemeMode.dark,
 ///   onTap: () => ref.read(themeViewModelProvider.notifier).setMode(ThemeMode.dark),
 /// )
 /// ```
@@ -20,20 +19,17 @@ class ThemeOptionTile extends StatelessWidget {
   const ThemeOptionTile({
     super.key,
     required this.label,
-    required this.mode,
-    required this.current,
+    required this.isSelected,
     required this.onTap,
   });
 
   final String label;
-  final ThemeMode mode;
-  final ThemeMode current;
+  final bool isSelected;
   final VoidCallback onTap;
 
   @override
   Widget build(BuildContext context) {
     final s = context.styles;
-    final isSelected = current == mode;
 
     return ListTile(
       title: Text(label),