refactor: fsd 구조로 변환

src/app/settings/page.tsx

@@ -1,7 +1,7 @@
 'use client';
 
 import { useEffect, useState } from 'react';
-import { getPreferences, savePreferences } from '@/lib/store';
+import { getPreferences, savePreferences } from '@/shared/lib/store';
 
 export default function SettingsPage() {
   const [hideSeconds, setHideSeconds] = useState(false);