评论区改用公共 Markdown 编辑器（不含隐藏内容），并忽略 GORM 未命中日志噪音。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/service/comment.go

@@ -302,6 +302,9 @@ func (s *CommentService) Create(userID, postID uint, content string, parentID *u
 	if content == "" {
 		return nil, nil, errors.New("评论内容不能为空")
 	}
+	if err := rejectHideBlocks(content, ErrCommentHideNotAllowed); err != nil {
+		return nil, nil, err
+	}
 	if status != model.ContentStatusPending && status != model.ContentStatusPublished {
 		status = model.ContentStatusPending
 	}
@@ -584,6 +587,9 @@ func (s *CommentService) Update(actor *Actor, commentID, userID uint, content st
 	if content == "" {
 		return nil, errors.New("评论内容不能为空")
 	}
+	if err := rejectHideBlocks(content, ErrCommentHideNotAllowed); err != nil {
+		return nil, err
+	}
 	var comment model.Comment
 	if err := s.db.Unscoped().First(&comment, commentID).Error; err != nil {
 		return nil, ErrCommentNotFound