Merge branch 'pre_gitlink_ssr' of https://gitlink.org.cn/Gitlink/forgeplus-react into gitlink_ssr_head

src/forge/Wiki/page/preview.jsx

@@ -54,10 +54,11 @@ export default (props) => {
 
   useEffect(() => {    
     document.title = `${checkItem && checkItem.titleStr || wikiBySearch}-维基预览`
+    if(!(str || checkItem.title_sub)) return 
     const func = sha ? getPreviousWiki : getWiki
     func({
       ...wikiParams,
-      pageName: str,
+      pageName: str || checkItem.title_sub,
       sha
     }).then(res => {
       if(res && res.code === 200){