refactor: KakaoAuthApi 및 관련 클래스 제거

- Kakao 인증 관련 KakaoAuthApi, KakaoAuthClient 등 불필요한 클래스 삭제
- 카카오 로그인 로직을 Access Token 기반으로 단순화
- 관련된 Request 및 Service 클래스에서 코드 파라미터 의존 제거
- client-kakao.yml에서 인증 관련 설정 제거

Author: wheon06

src/main/java/com/team/moodit/api/controller/v1/AuthController.java

@@ -24,7 +24,7 @@ public class AuthController {
     public ApiResponse<LoginResponse> loginWithKakao(
             @RequestBody KakaoLoginRequest request
     ) {
-        LoginResult result = loginService.loginWithKakao(request.code());
+        LoginResult result = loginService.loginWithKakao(request.accessToken());
         return ApiResponse.success(new LoginResponse(
                 result.getUserId(),
                 result.getAccessToken(),

src/main/java/com/team/moodit/api/controller/v1/request/KakaoLoginRequest.java

@@ -1,6 +1,6 @@
 package com.team.moodit.api.controller.v1.request;
 
 public record KakaoLoginRequest(
-        String code
+        String accessToken // 카카오 Access Token
 ) {
 }

src/main/java/com/team/moodit/clients/kakao/KakaoAuthApi.java

@@ -11,24 +11,9 @@
 
 @Configuration
 public class KakaoConfig {
-    @Value("${kakao-auth.base-url}")
-    private String kakaoAuthBaseUrl;
-
     @Value("${kakao-api.base-url}")
     private String kakaoApiBaseUrl;
 
-    @Bean
-    public KakaoAuthApi kakaoAuthApi() {
-        RestClient client = RestClient.builder()
-                .baseUrl(kakaoAuthBaseUrl)
-                .defaultHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_FORM_URLENCODED_VALUE)
-                .build();
-
-        RestClientAdapter adapter = RestClientAdapter.create(client);
-        HttpServiceProxyFactory factory = HttpServiceProxyFactory.builder().exchangeAdapter(adapter).build();
-        return factory.createClient(KakaoAuthApi.class);
-    }
-
     @Bean
     public KakaoApi kakaoApi() {
         RestClient client = RestClient.builder()

src/main/java/com/team/moodit/clients/kakao/KakaoAuthClient.java

@@ -1,22 +1,18 @@
 package com.team.moodit.domain.auth;
 
 import com.team.moodit.clients.kakao.KakaoApiClient;
-import com.team.moodit.clients.kakao.KakaoAuthClient;
 import com.team.moodit.clients.kakao.model.KakaoClientProfileResult;
-import com.team.moodit.clients.kakao.model.KakaoClientTokenResult;
 import com.team.moodit.domain.enums.SocialProviderType;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Component;
 
 @Component
 @RequiredArgsConstructor
 public class KakaoLoginHandler {
-    private final KakaoAuthClient kakaoAuthClient;
     private final KakaoApiClient kakaoApiClient;
 
-    public SocialProfile getProfile(String code) {
-        KakaoClientTokenResult token = kakaoAuthClient.getAccessToken(code);
-        KakaoClientProfileResult kakaoProfile = kakaoApiClient.getProfile(token.accessToken());
+    public SocialProfile getProfile(String kakaoAccessToken) {
+        KakaoClientProfileResult kakaoProfile = kakaoApiClient.getProfile(kakaoAccessToken);
 
         return new SocialProfile(
                 SocialProviderType.KAKAO,

src/main/java/com/team/moodit/clients/kakao/KakaoConfig.java

@@ -11,9 +11,9 @@ public class LoginService {
     private final TokenManager tokenManager;
 
     public LoginResult loginWithKakao(
-            String code
+            String kakaoAccessToken
     ) {
-        SocialProfile profile = kakaoLoginHandler.getProfile(code);
+        SocialProfile profile = kakaoLoginHandler.getProfile(kakaoAccessToken);
         AuthUser authUser = socialLoginHandler.loginOrSignup(profile);
 
         IssuedToken issuedToken = tokenManager.issue(authUser.getId(), authUser.getRole());

src/main/java/com/team/moodit/clients/kakao/KakaoTokenResponse.java

@@ -1,4 +1,4 @@
-package com.team.moodit.domain;
+package com.team.moodit.domain.user;
 
 import com.team.moodit.storage.db.core.UserEntity;
 import com.team.moodit.storage.db.core.UserRepository;