fix(flutter): 修正评论输入框高度与圆角

test/comment/drama_comments_sheet_test.dart

@@ -142,9 +142,9 @@ void main() {
 
     expect(
       tester.getSize(find.byKey(const Key('comment-post'))),
-      const Size(36, 36),
+      const Size(40, 40),
     );
-    expect(tester.getSize(find.byKey(const Key('comment-input'))).height, 44);
+    expect(tester.getSize(find.byKey(const Key('comment-input'))).height, 52);
     expect(
       find.byKey(const Key('player-comments-drag-handle')),
       findsOneWidget,