feat(flutter): 播放页互动数量与评论面板收紧

test/comment/drama_comments_sheet_test.dart

@@ -106,9 +106,57 @@ void main() {
         find.byKey(const Key('comment-input')),
       );
       expect(field.controller?.text, 'blocked text');
+      // 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);
     },
   );
 
+  testWidgets('should_unfocus_input_after_successful_post', (tester) async {
+    final repository = FakeCommentRepository(
+      pages: [const CommentPage()],
+      publishResult: commentFixture(id: '11', content: 'Nice demo', mine: true),
+    );
+
+    await _pumpSheet(tester, repository: repository);
+    final input = find.byKey(const Key('comment-input'));
+    await tester.tap(input);
+    await tester.pump();
+    expect(tester.widget<TextField>(input).focusNode?.hasFocus, isTrue);
+    await tester.enterText(input, 'Nice demo');
+    await tester.tap(find.byKey(const Key('comment-post')));
+    await tester.pumpAndSettle();
+
+    expect(tester.widget<TextField>(input).focusNode?.hasFocus, isFalse);
+  });
+
+  testWidgets('should_use_compact_comment_sizes', (tester) async {
+    final repository = FakeCommentRepository(
+      pages: [
+        CommentPage(
+          comments: [commentFixture(id: '10', content: 'Great episode')],
+        ),
+      ],
+    );
+
+    await _pumpSheet(tester, repository: repository);
+
+    expect(
+      tester.getSize(find.byKey(const Key('comment-post'))),
+      const Size(32, 32),
+    );
+    expect(tester.getSize(find.byKey(const Key('comment-input'))).height, 40);
+    final avatar = tester.widget<CircleAvatar>(
+      find.descendant(
+        of: find.byKey(const Key('comment-item-10')),
+        matching: find.byType(CircleAvatar),
+      ),
+    );
+    expect(avatar.radius, 14);
+    final body = tester.widget<Text>(find.text('Great episode'));
+    expect(body.style?.fontSize, 13);
+    expect(body.style?.height, 1.2);
+  });
+
   testWidgets('should_show_review_badge_and_server_replaced_content', (
     tester,
   ) async {