refactor: remove electron-related code

src/hooks/useFetchFollowings.tsx

@@ -0,0 +1,31 @@
+import { tagNameEquals } from '@/lib/tag'
+import client from '@/services/client.service'
+import { Event } from 'nostr-tools'
+import { useEffect, useState } from 'react'
+
+export function useFetchFollowings(pubkey?: string | null) {
+  const [followListEvent, setFollowListEvent] = useState<Event | null>(null)
+  const [followings, setFollowings] = useState<string[]>([])
+
+  useEffect(() => {
+    const init = async () => {
+      if (!pubkey) return
+
+      const event = await client.fetchFollowListEvent(pubkey)
+      if (!event) return
+
+      setFollowListEvent(event)
+      setFollowings(
+        event.tags
+          .filter(tagNameEquals('p'))
+          .map(([, pubkey]) => pubkey)
+          .filter(Boolean)
+          .reverse()
+      )
+    }
+
+    init()
+  }, [pubkey])
+
+  return { followings, followListEvent }
+}