#13 完了

frontend/src/pages/PostPage.tsx

@@ -12,7 +12,10 @@ const PostPage = () => {
   // const anyFlg = query.get ('match') === 'any'
   const anyFlg = false
   const tags = tagsQuery.split (' ').filter (e => e !== '')
-  document.title = `${ tags.join (anyFlg ? ' or ' : ' and ') } | ${ SITE_TITLE }`
+  if (tags.length)
+    document.title = `${ tags.join (anyFlg ? ' or ' : ' and ') } | ${ SITE_TITLE }`
+  else
+    document.title = `${ SITE_TITLE }　〜 ぼざクリも、ぼざろ外も、外伝もあるんだよ`
 
   useEffect(() => {
     const fetchPosts = async () => {