feat(flutter): 统一二级页头并恢复新剧暖色

test/discover/filter_page_test.dart

@@ -29,6 +29,7 @@ void main() {
     await _pumpFilterPage(tester);
 
     expect(find.byKey(const Key('filter-page')), findsOneWidget);
+    _expectUnifiedHeader(tester, const Key('filter-back'));
     expect(
       find.byKey(const Key('filter-group-label-category')),
       findsOneWidget,
@@ -184,6 +185,13 @@ final List<Drama> _filterDramas = [
   ),
 ];
 
+void _expectUnifiedHeader(WidgetTester tester, Key backKey) {
+  expect(tester.getSize(find.byKey(backKey)), const Size(36, 36));
+  final title = tester.widget<Text>(find.byKey(const Key('subpage-title')));
+  expect(title.style?.fontSize, 18);
+  expect(title.style?.fontWeight, FontWeight.w800);
+}
+
 Drama _drama({
   required String id,
   required String title,

test/discover/theater_pages_test.dart

@@ -29,6 +29,7 @@ void main() {
     await tester.pumpAndSettle();
 
     expect(find.byKey(const Key('ranking-page')), findsOneWidget);
+    _expectUnifiedHeader(tester, const Key('ranking-back'));
     expect(find.text('TOP 1'), findsOneWidget);
     expect(
       tester.widget<Text>(find.byKey(const Key('ranking-title-1'))).data,
@@ -46,6 +47,15 @@ void main() {
     await tester.pumpAndSettle();
 
     expect(find.byKey(const Key('new-releases-page')), findsOneWidget);
+    _expectUnifiedHeader(tester, const Key('new-releases-back'));
+    final newPage = tester.widget<Scaffold>(
+      find.byKey(const Key('new-releases-page')),
+    );
+    expect(newPage.backgroundColor, AppColors.ink);
+    final badge = tester.widget<Container>(
+      find.byKey(const Key('new-releases-hero-badge')),
+    );
+    expect((badge.decoration! as BoxDecoration).color, AppColors.blue);
     expect(find.byKey(const Key('new-releases-hero')), findsOneWidget);
     expect(find.text('Vengeance Rising'), findsWidgets);
     expect(
@@ -68,6 +78,7 @@ void main() {
     await tester.pumpAndSettle();
 
     expect(find.byKey(const Key('reserve-page')), findsOneWidget);
+    _expectUnifiedHeader(tester, const Key('reserve-back'));
     expect(find.byKey(const Key('reserve-week-strip')), findsOneWidget);
     for (var index = 0; index < 7; index++) {
       expect(find.byKey(Key('reserve-day-$index')), findsOneWidget);
@@ -207,3 +218,10 @@ List<Drama> _rankDramas(int count) => [
       ],
     ),
 ];
+
+void _expectUnifiedHeader(WidgetTester tester, Key backKey) {
+  expect(tester.getSize(find.byKey(backKey)), const Size(36, 36));
+  final title = tester.widget<Text>(find.byKey(const Key('subpage-title')));
+  expect(title.style?.fontSize, 18);
+  expect(title.style?.fontWeight, FontWeight.w800);
+}