style: 统一全站深色视觉

test/core/subpage_header_test.dart

@@ -28,7 +28,7 @@ void main() {
     final title = tester.widget<Text>(find.byKey(const Key('subpage-title')));
     expect(title.style?.fontSize, 18);
     expect(title.style?.fontWeight, FontWeight.w800);
-    expect(title.style?.color, AppColors.onSurface);
+    expect(title.style?.color, AppColors.textPrimary);
     final back = tester.getRect(find.byKey(const Key('sample-back')));
     final titleRect = tester.getRect(find.byKey(const Key('subpage-title')));
     expect(titleRect.left - back.right, closeTo(12, 0.5));
@@ -38,8 +38,8 @@ void main() {
         matching: find.byType(Material),
       ),
     );
-    expect(surface.color, AppColors.card);
-    expect((surface.shape! as CircleBorder).side.color, AppColors.border);
+    expect(surface.color, AppColors.transparent);
+    expect((surface.shape! as CircleBorder).side, BorderSide.none);
     final shadow =
         tester
                 .widget<DecoratedBox>(
@@ -47,9 +47,7 @@ void main() {
                 )
                 .decoration
             as BoxDecoration;
-    expect(shadow.boxShadow!.single.color, AppColors.shadowSubtle);
-    expect(shadow.boxShadow!.single.blurRadius, 8);
-    expect(shadow.boxShadow!.single.offset, const Offset(0, 2));
+    expect(shadow.boxShadow, isEmpty);
   });
 
   testWidgets('should_use_64_height_when_subtitle_exists', (tester) async {