feat(flutter): 增加关键操作震动反馈

lib/pages/watch_records/watch_records_page.dart

@@ -13,6 +13,7 @@ import '../../core/data/services/auth_controller.dart';
 import '../../core/data/services/watch_records_controller.dart';
 import '../../core/formatting/error_text.dart';
 import '../../core/formatting/localized_date_time.dart';
+import '../../core/platform/haptics.dart';
 import '../../core/theme/app_colors.dart';
 import '../../core/theme/app_theme.dart';
 import '../../core/widgets/auth_gate.dart';
@@ -141,6 +142,7 @@ class _WatchRecordsBodyState extends State<_WatchRecordsBody> {
   }
 
   Future<void> _remove(String dramaId) async {
+    unawaited(context.read<Haptics>().mediumImpact());
     final ok = await controller.remove(dramaId);
     if (!ok && mounted) _showFailure('recordDeleteFailed');
   }
@@ -164,7 +166,8 @@ class _WatchRecordsBodyState extends State<_WatchRecordsBody> {
         ],
       ),
     );
-    if (confirmed != true) return;
+    if (confirmed != true || !mounted) return;
+    unawaited(context.read<Haptics>().mediumImpact());
     final ok = await controller.clear();
     if (!ok && mounted) _showFailure('recordClearFailed');
   }