feat(flutter): 统一空列表占位组件

test/comment/drama_comments_sheet_test.dart

@@ -12,6 +12,7 @@ import 'package:fruitshorts/core/data/repositories/interaction_repository.dart';
 import 'package:fruitshorts/core/data/services/auth_controller.dart';
 import 'package:fruitshorts/core/data/services/auth_session_store.dart';
 import 'package:fruitshorts/core/platform/haptics.dart';
+import 'package:fruitshorts/core/widgets/empty_state.dart';
 import 'package:fruitshorts/l10n/app_localizations.dart';
 import 'package:fruitshorts/pages/player/widgets/drama_comments_sheet.dart';
 import 'package:provider/provider.dart';
@@ -68,6 +69,19 @@ void main() {
     expect(repository.pageCalls.last.cursor, '10');
   });
 
+  testWidgets('should_show_compact_empty_state_when_no_comments_exist', (
+    tester,
+  ) async {
+    final repository = FakeCommentRepository(pages: [const CommentPage()]);
+
+    await _pumpSheet(tester, repository: repository);
+
+    expect(find.byKey(const Key('comment-list-empty')), findsOneWidget);
+    expect(find.byType(EmptyState), findsOneWidget);
+    expect(tester.widget<EmptyState>(find.byType(EmptyState)).compact, isTrue);
+    expect(find.text('No comments yet.'), findsOneWidget);
+  });
+
   testWidgets(
     'should_keep_input_and_show_backend_message_when_comment_is_blocked',
     (tester) async {