feat: add reply comment functionality for Xiaohongshu feeds

- Implemented handleReplyComment method in mcp_handlers.go to manage replying to comments on feeds.
- Introduced ReplyCommentArgs struct in mcp_server.go for handling parameters related to comment replies.
- Registered a new MCP tool for replying to comments in the registerTools function.
- Added ReplyCommentToFeed method in service.go to interact with the Xiaohongshu platform for comment replies.
- Enhanced error handling for missing parameters in the reply process.

service.go

@@ -443,6 +443,21 @@ func (s *XiaohongshuService) UnfavoriteFeed(ctx context.Context, feedID, xsecTok
 	return &ActionResult{FeedID: feedID, Success: true, Message: "取消收藏成功或未收藏"}, nil
 }
 
+// ReplyCommentToFeed 回复笔记评论
+func (s *XiaohongshuService) ReplyCommentToFeed(ctx context.Context, feedID, xsecToken, commentID, userID, content string) (*ActionResult, error) {
+	b := newBrowser()
+	defer b.Close()
+
+	page := b.NewPage()
+	defer page.Close()
+
+	action := xiaohongshu.NewCommentFeedAction(page)
+	if err := action.ReplyToComment(ctx, feedID, xsecToken, commentID, userID, content); err != nil {
+		return nil, err
+	}
+	return &ActionResult{FeedID: feedID, Success: true, Message: "回复评论成功"}, nil
+}
+
 func newBrowser() *headless_browser.Browser {
 	return browser.NewBrowser(configs.IsHeadless(), browser.WithBinPath(configs.GetBinPath()))
 }