refactor: improve comment posting logic with enhanced error handling and stability checks

- Updated the PostComment method to include error handling for navigation and element interactions.
- Replaced sleep calls with more reliable wait mechanisms to ensure page stability.
- Added checks for the presence of input elements and improved logging for better debugging.

xiaohongshu/publish.go

@@ -7,6 +7,8 @@ import (
 	"os"
 	"strings"
 	"time"
+	"unicode"
+	"unicode/utf8"
 
 	"github.com/go-rod/rod"
 	"github.com/go-rod/rod/lib/input"
@@ -55,6 +57,11 @@ func (p *PublishAction) Publish(ctx context.Context, content PublishImageContent
 		return errors.New("图片不能为空")
 	}
 
+	trimmedContent := strings.TrimRightFunc(content.Content, unicode.IsSpace)
+	if utf8.RuneCountInString(trimmedContent) > 1000 {
+		return errors.New("正文内容不能超过1000个字符")
+	}
+
 	page := p.page.Context(ctx)
 
 	if err := uploadImages(page, content.ImagePaths); err != nil {