세션 IP 표시와 로그아웃 처리 보강

userfront/lib/core/services/auth_proxy_service.dart

@@ -264,6 +264,41 @@ class AuthProxyService {
     }
   }
 
+  static Future<String?> fetchCurrentSessionId() async {
+    final url = Uri.parse('$_baseUrl/api/v1/user/sessions');
+    final useCookie = AuthTokenStore.usesCookie();
+    final token = AuthTokenStore.getToken();
+    final client = createHttpClient(withCredentials: useCookie);
+    try {
+      final headers = <String, String>{'Content-Type': 'application/json'};
+      if (!useCookie && token != null && token.isNotEmpty) {
+        headers['Authorization'] = 'Bearer $token';
+      }
+      final response = await client.get(url, headers: headers);
+      if (response.statusCode != 200) {
+        throw _error(
+          'err.userfront.dashboard.sessions.load',
+          '활성 세션을 불러오지 못했습니다: {{error}}',
+          detail: response.body,
+        );
+      }
+
+      final body = jsonDecode(response.body) as Map<String, dynamic>;
+      final items = (body['items'] as List?) ?? const [];
+      for (final item in items.whereType<Map<String, dynamic>>()) {
+        if (item['is_current'] == true) {
+          final sessionId = item['session_id']?.toString().trim() ?? '';
+          if (sessionId.isNotEmpty) {
+            return sessionId;
+          }
+        }
+      }
+      return null;
+    } finally {
+      client.close();
+    }
+  }
+
   static Future<Map<String, dynamic>> verifyLoginShortCode(
     String shortCode, {
     bool verifyOnly = false,

userfront/lib/core/services/logout_service.dart

@@ -0,0 +1,39 @@
+import '../notifiers/auth_notifier.dart';
+import 'auth_proxy_service.dart';
+import 'auth_token_store.dart';
+
+typedef CurrentSessionLoader = Future<String?> Function();
+typedef SessionRevoker = Future<void> Function(String sessionId);
+typedef LogoutCallback = void Function();
+
+class LogoutService {
+  LogoutService({
+    CurrentSessionLoader? loadCurrentSessionId,
+    SessionRevoker? revokeSession,
+    LogoutCallback? clearAuth,
+    LogoutCallback? notifyAuthChanged,
+  }) : _loadCurrentSessionId =
+           loadCurrentSessionId ?? AuthProxyService.fetchCurrentSessionId,
+       _revokeSession = revokeSession ?? AuthProxyService.revokeSession,
+       _clearAuth = clearAuth ?? AuthTokenStore.clear,
+       _notifyAuthChanged = notifyAuthChanged ?? AuthNotifier.instance.notify;
+
+  final CurrentSessionLoader _loadCurrentSessionId;
+  final SessionRevoker _revokeSession;
+  final LogoutCallback _clearAuth;
+  final LogoutCallback _notifyAuthChanged;
+
+  Future<void> logout() async {
+    try {
+      final currentSessionId = await _loadCurrentSessionId();
+      if (currentSessionId != null && currentSessionId.isNotEmpty) {
+        await _revokeSession(currentSessionId);
+      }
+    } catch (_) {
+      // 서버 세션 종료는 best-effort로 처리하고, 로컬 로그아웃은 계속 진행합니다.
+    } finally {
+      _clearAuth();
+      _notifyAuthChanged();
+    }
+  }
+}

userfront/lib/features/dashboard/presentation/dashboard_screen.dart

@@ -12,6 +12,7 @@ import '../domain/providers/linked_rps_provider.dart';
 import '../domain/providers/user_sessions_provider.dart';
 import '../../../../core/notifiers/auth_notifier.dart';
 import '../../../../core/services/auth_proxy_service.dart';
+import '../../../../core/services/logout_service.dart';
 import '../../../../core/services/auth_token_store.dart';
 import '../../../../core/services/http_client.dart';
 import '../../../../core/i18n/locale_utils.dart';
@@ -74,8 +75,7 @@ class _DashboardScreenState extends ConsumerState<DashboardScreen> {
   }
 
   Future<void> _logout() async {
-    AuthTokenStore.clear();
-    AuthNotifier.instance.notify();
+    await LogoutService().logout();
   }
 
   Future<void> _onRevokeLink(String clientId, String appName) async {

userfront/lib/features/profile/presentation/pages/profile_page.dart

@@ -6,6 +6,7 @@ import 'package:userfront/i18n.dart';
 import '../../../../core/notifiers/auth_notifier.dart';
 import '../../../../core/i18n/locale_utils.dart';
 import '../../../../core/services/auth_proxy_service.dart';
+import '../../../../core/services/logout_service.dart';
 import '../../../../core/services/auth_token_store.dart';
 import '../../../../core/ui/layout_breakpoints.dart';
 import '../../../../core/ui/toast_service.dart';
@@ -164,8 +165,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
   }
 
   Future<void> _logout() async {
-    AuthTokenStore.clear();
-    AuthNotifier.instance.notify();
+    await LogoutService().logout();
   }
 
   void _ensureControllers(UserProfile profile) {

userfront/test/logout_service_test.dart

@@ -0,0 +1,74 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:userfront/core/services/logout_service.dart';
+
+void main() {
+  test('현재 세션이 있으면 서버 세션 종료 후 로컬 로그아웃을 진행한다', () async {
+    final events = <String>[];
+    final service = LogoutService(
+      loadCurrentSessionId: () async {
+        events.add('load');
+        return 'current-sid';
+      },
+      revokeSession: (sessionId) async {
+        events.add('revoke:$sessionId');
+      },
+      clearAuth: () {
+        events.add('clear');
+      },
+      notifyAuthChanged: () {
+        events.add('notify');
+      },
+    );
+
+    await service.logout();
+
+    expect(events, ['load', 'revoke:current-sid', 'clear', 'notify']);
+  });
+
+  test('현재 세션이 없으면 서버 세션 종료 없이 로컬 로그아웃만 진행한다', () async {
+    final events = <String>[];
+    final service = LogoutService(
+      loadCurrentSessionId: () async {
+        events.add('load');
+        return null;
+      },
+      revokeSession: (sessionId) async {
+        events.add('revoke:$sessionId');
+      },
+      clearAuth: () {
+        events.add('clear');
+      },
+      notifyAuthChanged: () {
+        events.add('notify');
+      },
+    );
+
+    await service.logout();
+
+    expect(events, ['load', 'clear', 'notify']);
+  });
+
+  test('서버 세션 종료가 실패해도 로컬 로그아웃은 계속 진행한다', () async {
+    final events = <String>[];
+    final service = LogoutService(
+      loadCurrentSessionId: () async {
+        events.add('load');
+        return 'current-sid';
+      },
+      revokeSession: (sessionId) async {
+        events.add('revoke:$sessionId');
+        throw Exception('revoke failed');
+      },
+      clearAuth: () {
+        events.add('clear');
+      },
+      notifyAuthChanged: () {
+        events.add('notify');
+      },
+    );
+
+    await service.logout();
+
+    expect(events, ['load', 'revoke:current-sid', 'clear', 'notify']);
+  });
+}