#70 #72

frontend/src/pages/posts/PostListPage.tsx

@@ -30,7 +30,7 @@ export default () => {
           .then (res => setPosts (toCamel (res.data, { deep: true })))
           .catch (err => {
             console.error ('Failed to fetch posts:', err)
-            setPosts (null)
+            setPosts ([])
           }))
 
     setWikiPage (null)
@@ -72,7 +72,7 @@ export default () => {
                   : '広場には何もありませんよ．')}
             </Tab>
             {(wikiPage && wikiPage.body) && (
-                <Tab name="Wiki" init={!(posts?.length)}>
+                <Tab name="Wiki" init={posts && !(posts.length)}>
                   <WikiBody body={wikiPage.body} />
                   <div className="my-2">
                     <Link to={`/wiki/${ wikiPage.title }`}>Wiki を見る</Link>

frontend/src/pages/wiki/WikiDetailPage.tsx

@@ -38,6 +38,8 @@ export default () => {
             WikiIdBus.set (res.data.id)
           })
           .catch (() => setWikiPage (null)))
+
+    return () => WikiIdBus.set (null)
   }, [title, location.search])
 
   return (