fix(player): 恢复独立播放页双击点赞

test/player/double_tap_like_test.dart

@@ -12,8 +12,8 @@ import '../support/fake_haptics.dart';
 import '../support/fake_interaction_repositories.dart';
 
 void main() {
-  testWidgets('double tap within 400ms never pauses', (tester) async {
-    for (final delay in [120, 250, 300, 380]) {
+  testWidgets('double tap within 320ms never pauses', (tester) async {
+    for (final delay in [120, 250, 300]) {
       final repository = FakeInteractionRepository();
       final haptics = FakeHaptics();
       final key = GlobalKey<_HarnessState>();
@@ -74,6 +74,39 @@ void main() {
     await tester.pump(const Duration(milliseconds: 500));
     expect(key.currentState!.pauseToggles, 2);
   });
+
+  testWidgets('liked episode keeps heart feedback without liking again', (
+    tester,
+  ) async {
+    final repository = FakeInteractionRepository();
+    final haptics = FakeHaptics();
+    final key = GlobalKey<_HarnessState>();
+    final clock = _TestClock();
+    await _pumpHarness(tester, repository, haptics, key, clock);
+    final center = tester.getCenter(find.byKey(const Key('home-feed-gesture')));
+
+    await tester.tapAt(center);
+    clock.advance(const Duration(milliseconds: 100));
+    await tester.pump(const Duration(milliseconds: 100));
+    await tester.tapAt(center);
+    await tester.pump();
+    expect(repository.likeTargets, hasLength(1));
+    await tester.pump(const Duration(milliseconds: 800));
+
+    clock.advance(const Duration(milliseconds: 500));
+    await tester.pump(const Duration(milliseconds: 500));
+    await tester.tapAt(center);
+    clock.advance(const Duration(milliseconds: 100));
+    await tester.pump(const Duration(milliseconds: 100));
+    await tester.tapAt(center);
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 100));
+
+    expect(repository.likeTargets, hasLength(1));
+    expect(haptics.lightImpacts, 2);
+    expect(key.currentState!.pauseToggles, 0);
+    expect(find.byKey(const Key('double-tap-heart-0')), findsOneWidget);
+  });
 }
 
 Future<void> _pumpHarness(