feat(theme): 校正 K26 预览色板与导航

test/theme/app_dimens_test.dart

@@ -6,18 +6,18 @@ import 'package:fruitshorts/core/theme/app_dimens.dart';
 void main() {
   test('should_expose_the_k20_spacing_and_type_scale', () {
     expect(AppDimens.pageHorizontal, 16);
-    expect(AppDimens.cardRadius, 16);
-    expect(AppDimens.innerRadius, 12);
+    expect(AppDimens.cardRadius, 12);
+    expect(AppDimens.innerRadius, 10);
     expect(AppDimens.caption, 12);
     expect(AppDimens.body, 14);
     expect(AppDimens.listTitle, 15);
     expect(AppDimens.sectionTitle, 16);
     expect(AppDimens.pageTitle, 20);
-    expect(AppDimens.navLabel, 11);
+    expect(AppDimens.navLabel, 9);
     expect(AppDimens.buttonHeight, 48);
     expect(AppDimens.primaryButtonHeight, 52);
     expect(AppDimens.tapTarget, 44);
-    expect(AppDimens.navHeight, 64);
-    expect(AppDimens.progressHeight, 4);
+    expect(AppDimens.navHeight, 54);
+    expect(AppDimens.progressHeight, 3);
   });
 }

test/theme/app_theme_test.dart

@@ -21,8 +21,10 @@ void main() {
     expect(AppColors.secondary, const Color(0xFF9278EA));
     expect(AppColors.gold, const Color(0xFFFBBF24));
     expect(AppColors.ink, const Color(0xFF0B0C10));
-    expect(AppColors.card, const Color(0xFF16181F));
-    expect(AppColors.raised, const Color(0xFF1D1E28));
+    expect(AppColors.card, const Color(0xFF1B1C21));
+    expect(AppColors.cardAlt, const Color(0xFF1C1D21));
+    expect(AppColors.raised, const Color(0xFF1C1D21));
+    expect(AppColors.bar, const Color(0xFF0D0D11));
     expect(AppColors.success, const Color(0xFF34D399));
     expect(AppColors.onPrimary, const Color(0xFFFFFFFF));
     expect(