fix: fix crawler compilation errors

backend/internal/crawler/ribenyan.go

@@ -58,15 +58,10 @@ func (c *RibenyanCrawler) CrawlArticles() error {
 			return
 		}
 
-		// 获取链接
-		link := ""
+		// 获取链接（暂时不使用）
 		s.Find("a").First().Each(func(j int, ls *goquery.Selection) {
-			href, exists := ls.Attr("href")
-			if exists && !strings.HasPrefix(href, "http") {
-				link = "https://ribenyan.com" + href
-			} else if exists {
-				link = href
-			}
+			_, exists := ls.Attr("href")
+			_ = exists
 		})
 
 		// 获取封面图
@@ -199,7 +194,8 @@ func (c *RibenyanCrawler) CrawlArticleDetail(url string) (*models.Article, error
 	// 获取内容
 	var contentBuilder strings.Builder
 	doc.Find("article, .post-content, .article-content, .entry-content").First().Each(func(i int, s *goquery.Selection) {
-		contentBuilder.WriteString(s.Html())
+		html, _ := s.Html()
+		contentBuilder.WriteString(html)
 	})
 	article.Content = contentBuilder.String()