feat(player): 评论发布成功提示

test/comment/drama_comments_sheet_test.dart

@@ -234,7 +234,11 @@ void main() {
         publishError: const ApiException(400, '评论包含敏感词'),
       );
 
-      await _pumpSheet(tester, repository: repository);
+      await _pumpSheet(
+        tester,
+        repository: repository,
+        locale: const Locale('zh'),
+      );
       await tester.tap(find.byKey(const Key('comment-input-placeholder')));
       await tester.pumpAndSettle();
       await tester.enterText(
@@ -250,6 +254,7 @@ void main() {
         find.byKey(const Key('comment-composer-input')),
       );
       expect(field.controller?.text, 'blocked text');
+      expect(find.text('发表成功'), findsNothing);
       // 发送失败时保留输入与焦点，用户可以直接改完再发。
       expect(field.focusNode?.hasFocus, isTrue);
     },
@@ -263,7 +268,11 @@ void main() {
       countResult: 1,
     );
 
-    await _pumpSheet(tester, repository: repository);
+    await _pumpSheet(
+      tester,
+      repository: repository,
+      locale: const Locale('zh'),
+    );
     final input = find.byKey(const Key('comment-composer-input'));
     tester.view.viewInsets = const FakeViewPadding(bottom: 180);
     await tester.tap(find.byKey(const Key('comment-input-placeholder')));
@@ -278,9 +287,25 @@ void main() {
       isNotNull,
     );
     await tester.tap(find.byKey(const Key('comment-composer-post')));
-    await tester.pumpAndSettle();
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 500));
 
     expect(find.byKey(const Key('comment-composer-sheet')), findsNothing);
+    final successSnackBar = find.byKey(
+      const Key('comment-post-success-snackbar'),
+    );
+    expect(successSnackBar, findsOneWidget);
+    expect(find.text('发表成功'), findsOneWidget);
+    final snackBar = tester.widget<SnackBar>(successSnackBar);
+    expect(snackBar.action, isNull);
+    expect(snackBar.behavior, SnackBarBehavior.floating);
+    expect(snackBar.duration, const Duration(milliseconds: 1500));
+    expect(
+      tester.getRect(find.text('发表成功')).bottom,
+      lessThanOrEqualTo(
+        tester.getRect(find.byKey(const Key('player-comments-sheet'))).top,
+      ),
+    );
     expect(find.byKey(const Key('comment-list')), findsOneWidget);
     expect(find.byKey(const Key('comment-count-label')), findsOneWidget);
     expect(find.byKey(const Key('comment-input-placeholder')), findsOneWidget);
@@ -669,6 +694,7 @@ Future<AuthController> _pumpSheet(
   WidgetTester tester, {
   required FakeCommentRepository repository,
   FakeHaptics? haptics,
+  Locale locale = const Locale('en'),
 }) async {
   final auth = await _auth();
   await tester.pumpWidget(
@@ -682,7 +708,7 @@ Future<AuthController> _pumpSheet(
         Provider<Haptics>.value(value: haptics ?? FakeHaptics()),
       ],
       child: MaterialApp(
-        locale: const Locale('en'),
+        locale: locale,
         localizationsDelegates: AppLocalizations.localizationsDelegates,
         supportedLocales: AppLocalizations.supportedLocales,
         initialRoute: '/comments',