refactor: 회원가입 성공 시 토큰 추가

Author: kwonsaebom

src/page/signup/SignUp.tsx

@@ -9,7 +9,8 @@ import { useSignUpForm } from '@/page/signup/hook/useSignUpForm';
 import { PATH } from '@/route';
 import { usePostSignUp } from '@/api/domain/signup/hook/usePostSignup';
 import type { SignupRequest } from '@/api/domain/signup/type/SignupRequest';
-import { useGoogleAuth } from '@/common/hook/useGoogleAuth';
+import getGoogleAuthCode from '@/api/auth/googleLogin/util/getGoogleAuthCode';
+import getAccessToken from '@/api/auth/googleLogin/util/getAccessToken';
 
 const SIGNUP_MESSAGE = '회원가입 후 NiNE DOT를 만나보세요!';
 const FIT_INFO_MESSAGE = '내 성향을 선택하고 맞춤형 목표 추천을 받아보세요';
@@ -48,8 +49,19 @@ const SignUp = () => {
     };
 
     signUp(payload, {
-      onSuccess: () => {
-        useGoogleAuth();
+      onSuccess: async () => {
+        try {
+          const code = getGoogleAuthCode();
+          if (code) {
+            const data = await getAccessToken(code);
+            if (data.accessToken) {
+              localStorage.setItem('accessToken', data.accessToken);
+            }
+          }
+        } catch (e) {
+          console.error('토큰 교환 실패:', e);
+        }
+
         navigate(PATH.INTRO, { state: { pageState: 'MANDALART' } });
       },
       onError: () => {},