feat: Wiki 有無判定軽量化（#233） (#234)

#233 Backend が対応できてなかったのでそっちも対応させた．

Co-authored-by: miteruzo <miteruzo@naver.com>
Reviewed-on: #234

frontend/src/components/TagLink.tsx

@@ -32,7 +32,15 @@ export default (({ tag,
 		   ...props }: Props) => {
   const [havingWiki, setHavingWiki] = useState (true)
 
-  const wikiExists = async (tagName: string) => {
+  const wikiExists = async (tag: Tag) => {
+    if ('hasWiki' in tag)
+      {
+	setHavingWiki (tag.hasWiki)
+	return
+      }
+
+    const tagName = (tag as Tag).name
+
     try
     {
       await axios.get (`${ API_BASE_URL }/wiki/title/${ encodeURIComponent (tagName) }/exists`)
@@ -48,7 +56,7 @@ export default (({ tag,
     if (!(linkFlg) || !(withWiki))
       return
 
-    wikiExists (tag.name)
+    wikiExists (tag)
   }, [tag.name, linkFlg, withWiki])
 
   const spanClass = cn (