test: 按新 UI 基线重写过期用例

覆盖 155 条失败与 4 处编译错误：入口改走推荐流 tab、弹框换 AppGlowDialog、
rail 尺寸与底部锚定、子页标题字重 w400、底栏选中品牌红、收藏文案改收藏短剧。
全量 flutter test 775 通过。

test/core/android_picture_in_picture_test.dart

@@ -28,12 +28,20 @@ void main() {
   });
 
   group('platform support', () {
-    test('should_support_only_android_when_target_is_checked', () {
-      debugDefaultTargetPlatformOverride = TargetPlatform.android;
-      expect(pip().isPlatformSupported, isTrue);
+    test('should_support_android_and_ios_when_target_is_checked', () {
+      for (final platform in <TargetPlatform>[
+        TargetPlatform.android,
+        TargetPlatform.iOS,
+      ]) {
+        debugDefaultTargetPlatformOverride = platform;
+        expect(
+          pip().isPlatformSupported,
+          isTrue,
+          reason: '$platform must claim picture in picture support',
+        );
+      }
 
       for (final platform in <TargetPlatform>[
-        TargetPlatform.iOS,
         TargetPlatform.macOS,
         TargetPlatform.linux,
         TargetPlatform.windows,
@@ -50,8 +58,10 @@ void main() {
   });
 
   group('enter', () {
-    test('should_refuse_without_touching_channel_when_target_is_not_android', () async {
-      debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+    const url = 'https://cdn.example.com/episode-1.mp4';
+
+    test('should_refuse_without_touching_channel_when_target_is_not_supported', () async {
+      debugDefaultTargetPlatformOverride = TargetPlatform.macOS;
       final calls = <MethodCall>[];
       messenger.setMockMethodCallHandler(channel, (call) async {
         calls.add(call);
@@ -59,7 +69,10 @@ void main() {
       });
       addTearDown(() => messenger.setMockMethodCallHandler(channel, null));
 
-      expect(await pip().enter(), isFalse);
+      expect(
+        await pip().enter(url: url, positionMs: 4200),
+        isFalse,
+      );
       expect(calls, isEmpty);
     });
 
@@ -68,7 +81,10 @@ void main() {
       messenger.setMockMethodCallHandler(channel, (call) async => null);
       addTearDown(() => messenger.setMockMethodCallHandler(channel, null));
 
-      expect(await pip().enter(), isFalse);
+      expect(
+        await pip().enter(url: url, positionMs: 4200),
+        isFalse,
+      );
     });
 
     test('should_report_entered_when_native_call_succeeds', () async {
@@ -80,16 +96,19 @@ void main() {
       });
       addTearDown(() => messenger.setMockMethodCallHandler(channel, null));
 
-      expect(await pip().enter(), isTrue);
+      expect(
+        await pip().enter(url: url, positionMs: 4200),
+        isTrue,
+      );
       expect(calls.single.method, 'enter');
-      expect(calls.single.arguments, isNull);
+      expect(calls.single.arguments, {'url': url, 'positionMs': 4200});
     });
   });
 
   group('state listener', () {
     test('should_deliver_pip_state_changes_in_order_when_native_events_arrive', () async {
       final received = <bool>[];
-      pip().setStateListener(received.add);
+      pip().setStateListener((active, _) => received.add(active));
 
       await sendToDart('onPipChanged', true);
       await sendToDart('onPipChanged', false);
@@ -99,7 +118,7 @@ void main() {
 
     test('should_treat_only_literal_true_as_enabled_when_native_value_arrives', () async {
       final received = <bool>[];
-      pip().setStateListener(received.add);
+      pip().setStateListener((active, _) => received.add(active));
 
       await sendToDart('onPipChanged', null);
       await sendToDart('onPipChanged', 'yes');
@@ -110,7 +129,7 @@ void main() {
 
     test('should_ignore_unrelated_native_methods_when_events_arrive', () async {
       final received = <bool>[];
-      pip().setStateListener(received.add);
+      pip().setStateListener((active, _) => received.add(active));
 
       await sendToDart('somethingElse', true);
       await sendToDart('onPipChanged', true);
@@ -120,7 +139,8 @@ void main() {
 
     test('should_silence_later_callbacks_when_listener_is_cleared', () async {
       final received = <bool>[];
-      final observer = pip()..setStateListener(received.add);
+      final observer = pip()
+        ..setStateListener((active, _) => received.add(active));
       await sendToDart('onPipChanged', true);
 
       observer.setStateListener(null);

test/core/subpage_header_test.dart

@@ -27,11 +27,11 @@ 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?.fontWeight, FontWeight.w400);
     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));
+    expect(titleRect.left - back.right, closeTo(6, 0.5));
     final surface = tester.widget<Material>(
       find.descendant(
         of: find.byKey(const Key('sample-back')),