Cache follows in localstorage

web/hooks/use-follows.ts

@@ -5,7 +5,16 @@ export const useFollows = (userId: string | null | undefined) => {
   const [followIds, setFollowIds] = useState<string[] | undefined>()
 
   useEffect(() => {
-    if (userId) return listenForFollows(userId, setFollowIds)
+    if (userId) {
+      const key = `follows:${userId}`
+      const follows = localStorage.getItem(key)
+      if (follows) setFollowIds(JSON.parse(follows))
+
+      return listenForFollows(userId, (follows) => {
+        setFollowIds(follows)
+        localStorage.setItem(key, JSON.stringify(follows))
+      })
+    }
   }, [userId])
 
   return followIds