fix: 修复卡片description处理逻辑

- 书签导入时保持description为空
- 所有页面站点卡片的空description显示为URL

src/bookmark-processor.js

@@ -158,7 +158,7 @@ function parseBookmarks(htmlContent) {
         name: name,
         url: url,
         icon: icon,
-        description: name
+        description: ''
       });
     }