#169 バグ修正

frontend/src/pages/posts/PostListPage.tsx

@@ -45,7 +45,7 @@ export default () => {
 		       .map (post => [post.id, post])))
 	     .values ())]))
     setCursor (data.nextCursor)
-    setTotalPages (Math.trunc ((data.count - 1) / limit))
+    setTotalPages (Math.ceil (data.count / limit))
 
     setLoading (false)
   }