types import error fixed

frontend/src/contexts/AuthContext.tsx

@@ -1,7 +1,8 @@
 /* eslint-disable react-refresh/only-export-components */
-import React, { createContext, useContext, useState, useEffect, ReactNode } from 'react';
+import { createContext, useContext, useState, useEffect } from 'react';
+import type { ReactNode } from 'react';
 import * as api from '../lib/api';
-import { User } from '@/types';
+import type { User } from '@/types';
 
 interface AuthContextType {
   user: User | null;