feat(flutter): 统一二级页头并恢复新剧暖色

test/core/subpage_header_test.dart

@@ -0,0 +1,86 @@
+// Author: fruit.com.cn
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:fruitshorts/core/theme/app_colors.dart';
+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 {
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: AppTheme.light(),
+        home: Scaffold(
+          body: AppSubpageHeader(
+            title: 'Title',
+            backKey: const Key('sample-back'),
+          ),
+        ),
+      ),
+    );
+
+    expect(tester.getSize(find.byKey(const Key('subpage-header'))).height, 52);
+    expect(
+      tester.getSize(find.byKey(const Key('sample-back'))),
+      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);
+    expect(title.style?.color, AppColors.onSurface);
+    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));
+  });
+
+  testWidgets('should_use_64_height_when_subtitle_exists', (tester) async {
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: AppTheme.light(),
+        home: Scaffold(
+          body: AppSubpageHeader(
+            title: 'Title',
+            subtitle: 'Subtitle',
+            backKey: const Key('sample-back'),
+          ),
+        ),
+      ),
+    );
+
+    expect(tester.getSize(find.byKey(const Key('subpage-header'))).height, 64);
+    expect(find.byKey(const Key('subpage-subtitle')), findsOneWidget);
+  });
+
+  testWidgets('should_use_transparent_dark_back_button', (tester) async {
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: AppTheme.light(),
+        home: const Scaffold(
+          backgroundColor: Colors.black,
+          body: AppSubpageHeader(
+            title: 'Title',
+            backKey: Key('sample-back'),
+            dark: true,
+          ),
+        ),
+      ),
+    );
+
+    final material = tester.widget<Material>(
+      find.descendant(
+        of: find.byKey(const Key('sample-back')),
+        matching: find.byType(Material),
+      ),
+    );
+    final icon = tester.widget<Icon>(
+      find.descendant(
+        of: find.byKey(const Key('sample-back')),
+        matching: find.byIcon(Icons.chevron_left_rounded),
+      ),
+    );
+    expect(material.color, Colors.transparent);
+    expect(icon.color, Colors.white);
+    expect(icon.size, 20);
+  });
+}