#28 件数 0 件除外をついでに対応（フロントのみ；バックエンドは後で対応）

frontend/src/components/PostFormTagsArea.tsx

@@ -60,7 +60,8 @@ export default (({ tags, setTags }: Props) => {
     const { start, end, token } = getTokenAt (v, pos)
     setBounds ({ start, end })
     const res = await axios.get (`${ API_BASE_URL }/tags/autocomplete`, { params: { q: token } })
-    setSuggestions (toCamel (res.data as any, { deep: true }) as Tag[])
+    const data = toCamel (res.data as any, { deep: true }) as Tag[]
+    setSuggestions (data.filter (t => t.postCount > 0))
     setSuggestionsVsbl (suggestions.length > 0)
   }
 

frontend/src/components/TagSearch.tsx

@@ -33,7 +33,7 @@ export default (() => {
 
     const res = await axios.get (`${ API_BASE_URL }/tags/autocomplete`, { params: { q } })
     const data = toCamel (res.data, { deep: true }) as Tag[]
-    setSuggestions (data)
+    setSuggestions (data.filter (t => t.postCount > 0))
     if (suggestions.length > 0)
       setSuggestionsVsbl (true)
   }