fix: resolve issue with post slug possibly being empty during wordpre…

…ss importing (#48)

修复 WordPress 迁移时，文章别名可能为空导致迁移失败的问题。

/kind bug


```release-note
修复 WordPress 迁移时，文章别名可能为空导致迁移失败的问题。
```

console/src/modules/wordpress/use-wordpress-data-parser.ts

@@ -173,7 +173,7 @@ export function useWordPressDataParser(
           post: {
             spec: {
               title: post.title,
-              slug: post["wp:post_name"] + "",
+              slug: post["wp:post_name"] || post.title,
               deleted: post["wp:status"] === "trash",
               publish: publish,
               publishTime: new Date(post["wp:post_date"]).toISOString(),