From 26bd40d80421b32fd63ab27fabc7d4e485a457ff Mon Sep 17 00:00:00 2001
From: miteruzo <miteruzo@naver.com>
Date: Sun, 8 Feb 2026 01:11:05 +0900
Subject: [PATCH] #140

---
 frontend/src/components/TopNav.tsx |  2 +-
 frontend/src/lib/prefetchers.ts    | 18 ++++++++++++++----
 frontend/src/lib/wiki.ts           |  2 +-
 3 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/frontend/src/components/TopNav.tsx b/frontend/src/components/TopNav.tsx
index 81816f2..144f517 100644
--- a/frontend/src/components/TopNav.tsx
+++ b/frontend/src/components/TopNav.tsx
@@ -65,7 +65,7 @@ export default (({ user }: Props) => {
   const postCount = tag?.postCount ?? 0
 
   const wikiPageFlg = Boolean (/^\/wiki\/(?!new|changes)[^\/]+/.test (location.pathname) && wikiId)
-  const wikiTitle = location.pathname.split ('/')[2]
+  const wikiTitle = location.pathname.split ('/')[2] ?? ''
   const menu: Menu = [
       { name: '広場', to: '/posts', subMenu: [
 	  { name: '一覧', to: '/posts' },
diff --git a/frontend/src/lib/prefetchers.ts b/frontend/src/lib/prefetchers.ts
index f034459..d61291e 100644
--- a/frontend/src/lib/prefetchers.ts
+++ b/frontend/src/lib/prefetchers.ts
@@ -4,7 +4,9 @@ import { match } from 'path-to-regexp'
 import { fetchPost, fetchPosts, fetchPostChanges } from '@/lib/posts'
 import { postsKeys, tagsKeys, wikiKeys } from '@/lib/queryKeys'
 import { fetchTagByName } from '@/lib/tags'
-import { fetchWikiPageByTitle, fetchWikiPages } from '@/lib/wiki'
+import { fetchWikiPage,
+	 fetchWikiPageByTitle,
+	 fetchWikiPages } from '@/lib/wiki'
 
 type Prefetcher = (qc: QueryClient, url: URL) => Promise<void>
 
@@ -33,11 +35,19 @@ const prefetchWikiPageShow: Prefetcher = async (qc, url) => {
       queryKey: wikiKeys.show (title, { version }),
       queryFn:  () => fetchWikiPageByTitle (title, { version }) })
 
-  if (wikiPage?.body)
+  if (wikiPage)
     {
+      const effectiveId = String (wikiPage.id ?? '')
       await qc.prefetchQuery ({
-	  queryKey: wikiKeys.index ({ }),
-	  queryFn: () => fetchWikiPages ({ }) })
+	  queryKey: wikiKeys.show (effectiveId, { }),
+	  queryFn: () => fetchWikiPage (effectiveId, { } ) })
+
+      if (wikiPage.body)
+	{
+	  await qc.prefetchQuery ({
+	      queryKey: wikiKeys.index ({ }),
+	      queryFn: () => fetchWikiPages ({ }) })
+	}
     }
 
   const effectiveTitle = wikiPage?.title ?? title
diff --git a/frontend/src/lib/wiki.ts b/frontend/src/lib/wiki.ts
index 2899dad..276db3a 100644
--- a/frontend/src/lib/wiki.ts
+++ b/frontend/src/lib/wiki.ts
@@ -22,7 +22,7 @@ export const fetchWikiPageByTitle = async (
 ): Promise<WikiPage | null> => {
   try
   {
-    return await apiGet (`/wiki/title/${ title }`, { params: { version } })
+    return await apiGet (`/wiki/title/${ encodeURIComponent (title) }`, { params: { version } })
   }
   catch
   {