style(theme): 客户端切换深色视觉风格

test/core/subpage_header_test.dart

@@ -7,7 +7,7 @@ import 'package:fruitshorts/core/theme/app_theme.dart';
 import 'package:fruitshorts/core/widgets/subpage_header.dart';
 
 void main() {
-  testWidgets('should_render_unified_light_header_dimensions', (tester) async {
+  testWidgets('should_render_unified_dark_header_dimensions', (tester) async {
     await tester.pumpWidget(
       MaterialApp(
         theme: AppTheme.light(),
@@ -47,7 +47,7 @@ void main() {
                 )
                 .decoration
             as BoxDecoration;
-    expect(shadow.boxShadow!.single.color, const Color(0x14000000));
+    expect(shadow.boxShadow!.single.color, AppColors.shadowSubtle);
     expect(shadow.boxShadow!.single.blurRadius, 8);
     expect(shadow.boxShadow!.single.offset, const Offset(0, 2));
   });
@@ -75,7 +75,7 @@ void main() {
       MaterialApp(
         theme: AppTheme.light(),
         home: const Scaffold(
-          backgroundColor: Colors.black,
+          backgroundColor: AppColors.mediaBlack,
           body: AppSubpageHeader(
             title: 'Title',
             backKey: Key('sample-back'),
@@ -97,8 +97,8 @@ void main() {
         matching: find.byIcon(Icons.chevron_left_rounded),
       ),
     );
-    expect(material.color, const Color(0x59000000));
-    expect(icon.color, Colors.white);
+    expect(material.color, AppColors.headerScrim);
+    expect(icon.color, AppColors.onSurface);
     expect(icon.size, 22);
     expect(icon.weight, 600);
     final shadow =
@@ -108,7 +108,7 @@ void main() {
                 )
                 .decoration
             as BoxDecoration;
-    expect(shadow.boxShadow!.single.color, const Color(0x33000000));
+    expect(shadow.boxShadow!.single.color, AppColors.shadowSoft);
     expect(shadow.boxShadow!.single.blurRadius, 8);
   });
 }