QR 로그인 구현 완료

userfront/lib/core/services/auth_proxy_service.dart

@@ -282,19 +282,41 @@ class AuthProxyService {
     throw Exception('QR Polling failed: ${response.body}');
   }
 
-  static Future<void> approveQrLogin(String pendingRef, String token) async {
+  static Future<void> approveQrLogin(
+    String pendingRef, {
+    String? token,
+    bool withCredentials = false,
+  }) async {
     final url = Uri.parse('$_baseUrl/api/v1/auth/qr/approve'); // Mapping to ScanQRLogin on backend
-    final response = await http.post(
-      url,
-      headers: {'Content-Type': 'application/json'},
-      body: jsonEncode({
-        'pendingRef': pendingRef,
-        'token': token,
-      }),
-    );
+    final payload = <String, dynamic>{
+      'pendingRef': pendingRef,
+    };
+    if (token != null && token.isNotEmpty) {
+      payload['token'] = token;
+    }
 
-    if (response.statusCode != 200) {
-      throw Exception('QR Approval failed: ${response.body}');
+    http.Client? client;
+    try {
+      if (withCredentials) {
+        client = createHttpClient(withCredentials: true);
+      }
+      final response = await (client != null
+          ? client.post(
+              url,
+              headers: {'Content-Type': 'application/json'},
+              body: jsonEncode(payload),
+            )
+          : http.post(
+              url,
+              headers: {'Content-Type': 'application/json'},
+              body: jsonEncode(payload),
+            ));
+
+      if (response.statusCode != 200) {
+        throw Exception('QR Approval failed: ${response.body}');
+      }
+    } finally {
+      client?.close();
     }
   }