style(theme): 客户端切换深色视觉风格

lib/app.dart

@@ -53,13 +53,15 @@ import 'core/theme/app_colors.dart';
 import 'l10n/app_localizations.dart';
 import 'pages/home/home_view.dart';
 
-/// 全局系统栏样式：浅暖导航栏、关闭 Android 对比遮罩。
-final SystemUiOverlayStyle appSystemOverlayStyle = SystemUiOverlayStyle.dark
+/// 全局系统栏样式：深色底 + 浅色图标，关闭 Android 对比遮罩。
+final SystemUiOverlayStyle appSystemOverlayStyle = SystemUiOverlayStyle.light
     .copyWith(
-      statusBarColor: Colors.transparent,
+      statusBarColor: AppColors.transparent,
+      statusBarIconBrightness: Brightness.light,
+      statusBarBrightness: Brightness.dark,
       systemNavigationBarColor: AppColors.ink,
-      systemNavigationBarDividerColor: Colors.transparent,
-      systemNavigationBarIconBrightness: Brightness.dark,
+      systemNavigationBarDividerColor: AppColors.transparent,
+      systemNavigationBarIconBrightness: Brightness.light,
       systemNavigationBarContrastEnforced: false,
     );
 
@@ -280,9 +282,9 @@ class _LumaDramaAppState extends State<LumaDramaApp> {
           localeResolutionCallback: (deviceLocale, _) =>
               resolveAppLocale(deviceLocale),
           debugShowCheckedModeBanner: false,
-          themeMode: ThemeMode.light,
-          theme: AppTheme.light(),
-          darkTheme: AppTheme.light(),
+          themeMode: ThemeMode.dark,
+          theme: AppTheme.dark(),
+          darkTheme: AppTheme.dark(),
           builder: (context, child) => AnnotatedRegion<SystemUiOverlayStyle>(
             value: appSystemOverlayStyle,
             child: child ?? const SizedBox.shrink(),