연동 ㅎ해지 UI 및 서비스 로직 구현

userfront/lib/core/services/auth_proxy_service.dart

@@ -594,6 +594,44 @@ class AuthProxyService {
     }
   }
 
+  static Future<List<dynamic>> fetchLinkedRps() async {
+    final url = Uri.parse('$_baseUrl/api/v1/user/rp/linked');
+    final client = createHttpClient(withCredentials: true);
+    try {
+      final response = await client.get(
+        url,
+        headers: {'Content-Type': 'application/json'},
+      );
+
+      if (response.statusCode == 200) {
+        final data = jsonDecode(response.body);
+        return data['items'] ?? [];
+      } else {
+        throw Exception('연동된 앱 목록을 불러오지 못했습니다.');
+      }
+    } finally {
+      client.close();
+    }
+  }
+
+  static Future<void> revokeLinkedRp(String clientId) async {
+    final url = Uri.parse('$_baseUrl/api/v1/user/rp/linked/$clientId');
+    final client = createHttpClient(withCredentials: true);
+    try {
+      final response = await client.delete(
+        url,
+        headers: {'Content-Type': 'application/json'},
+      );
+
+      if (response.statusCode != 200) {
+        final errorBody = jsonDecode(response.body);
+        throw Exception(errorBody['error'] ?? '연동 해지에 실패했습니다.');
+      }
+    } finally {
+      client.close();
+    }
+  }
+
   static Future<void> sendLog(String level, String message, {Map<String, dynamic>? data}) async {
     if (!_canSendClientLog()) {
       return;