style(theme): 客户端切换深色视觉风格

test/auth/auth_visual_test.dart

@@ -13,6 +13,7 @@ import 'package:fruitshorts/core/data/services/auth_controller.dart';
 import 'package:fruitshorts/core/data/services/auth_session_store.dart';
 import 'package:fruitshorts/core/platform/haptics.dart';
 import 'package:fruitshorts/core/theme/app_colors.dart';
+import 'package:fruitshorts/core/theme/app_dimens.dart';
 import 'package:fruitshorts/core/theme/app_theme.dart';
 import 'package:fruitshorts/l10n/app_localizations.dart';
 import 'package:fruitshorts/pages/auth/auth_view.dart';
@@ -131,7 +132,10 @@ void main() {
       final card = tester.widget<Container>(find.byKey(const Key('auth-card')));
       final cardDecoration = card.decoration! as BoxDecoration;
       expect(cardDecoration.color, AppColors.card);
-      expect(cardDecoration.borderRadius, BorderRadius.circular(20));
+      expect(
+        cardDecoration.borderRadius,
+        BorderRadius.circular(AppDimens.authCardRadius),
+      );
       expect(cardDecoration.boxShadow, contains(AppTheme.cardShadow));
       expect(card.padding, const EdgeInsets.all(20));