diff --git a/lib/core/data/services/auth_controller.dart b/lib/core/data/services/auth_controller.dart
index 7b51540..0df92e4 100644
--- a/lib/core/data/services/auth_controller.dart
+++ b/lib/core/data/services/auth_controller.dart
@@ -90,6 +90,20 @@ class AuthController extends ChangeNotifier {
     notifyListeners();
   }
 
+  /// 资料保存成功后同步登录态摘要，保留当前令牌。
+  Future<void> applyProfile(AuthUser user) async {
+    final current = _session;
+    if (current == null) return;
+    await _apply(
+      AuthSession(
+        accessToken: current.accessToken,
+        refreshToken: current.refreshToken,
+        expiresIn: current.expiresIn,
+        user: user,
+      ),
+    );
+  }
+
   Future<void> _apply(AuthSession session) async {
     _session = session;
     await _store.save(session);
diff --git a/test/account/auth_profile_sync_test.dart b/test/account/auth_profile_sync_test.dart
new file mode 100644
index 0000000..d732c1a
--- /dev/null
+++ b/test/account/auth_profile_sync_test.dart
@@ -0,0 +1,65 @@
+// Author: fruit.com.cn
+
+import 'dart:convert';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:shared_preferences_platform_interface/in_memory_shared_preferences_async.dart';
+import 'package:shared_preferences_platform_interface/shared_preferences_async_platform_interface.dart';
+
+import 'package:fruitshorts/core/data/models/auth_session.dart';
+import 'package:fruitshorts/core/data/remote/api_client.dart';
+import 'package:fruitshorts/core/data/remote/auth_api.dart';
+import 'package:fruitshorts/core/data/services/auth_controller.dart';
+import 'package:fruitshorts/core/data/services/auth_session_store.dart';
+
+import '../support/fake_http_adapter.dart';
+
+void main() {
+  test('should_update_profile_summary_and_keep_tokens_when_applied', () async {
+    SharedPreferencesAsyncPlatform.instance =
+        InMemorySharedPreferencesAsync.empty();
+    final adapter = FakeHttpAdapter(
+      (_) async => FakeHttpResponse(
+        jsonEncode({
+          'code': 0,
+          'message': 'ok',
+          'data': {
+            'accessToken': 'access-1',
+            'refreshToken': 'refresh-1',
+            'expiresIn': 7200,
+            'user': {
+              'uid': 'U-OLD',
+              'nickname': 'Old',
+              'avatarUrl': 'old.png',
+            },
+          },
+        }),
+      ),
+    );
+    late AuthController auth;
+    final client = ApiClient(
+      baseUrl: 'http://127.0.0.1:8081',
+      adapter: adapter,
+      accessTokenReader: () => auth.accessToken,
+      tokenRefresher: () => auth.refresh(),
+    );
+    auth = AuthController(AuthApi(client), AuthSessionStore());
+    await auth.register(email: 'a@b.com', password: 'abcd1234');
+
+    await auth.applyProfile(
+      const AuthUser(
+        uid: 'U-K19',
+        nickname: 'Nadia',
+        avatarUrl: 'avatar-k19.png',
+      ),
+    );
+
+    expect(auth.accessToken, 'access-1');
+    expect(auth.user?.uid, 'U-K19');
+    expect(auth.user?.nickname, 'Nadia');
+    expect(auth.user?.avatarUrl, 'avatar-k19.png');
+    final saved = await AuthSessionStore().read();
+    expect(saved?.refreshToken, 'refresh-1');
+    expect(saved?.user.nickname, 'Nadia');
+  });
+}