fix(flutter): 修正评论输入框高度与圆角

lib/pages/player/widgets/drama_comments_sheet.dart

@@ -22,9 +22,9 @@ import 'comment_tile.dart';
 const double _minSheetHeight = 280;
 const double _maxSheetHeight = 520;
 const int _maxCommentLength = 300;
-const double _composerRadius = 22;
-const double _composerHeight = 44;
-const double _sendButtonSize = 36;
+const double _composerRadius = 12;
+const double _composerHeight = 52;
+const double _sendButtonSize = 40;
 const double _sheetRadius = 20;
 
 /// 服务端评论底部弹窗：匿名列表、游标翻页、回复、点赞和本人删除。
@@ -343,7 +343,7 @@ class _DramaCommentsSheetState extends State<DramaCommentsSheet> {
       counterText: '',
       filled: true,
       fillColor: AppColors.commentInput,
-      contentPadding: const EdgeInsets.symmetric(horizontal: 14),
+      contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
       isDense: true,
       border: clear,
       enabledBorder: clear,