/api/v1/user/me 세션 시각을 추가하고 userfront 대시보드 Unknown 세션 시간 문제 수정

userfront/test/dashboard_session_time_resolver_test.dart

@@ -0,0 +1,35 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:userfront/features/dashboard/domain/session_time_resolver.dart';
+import 'package:userfront/features/profile/data/models/user_profile_model.dart';
+
+void main() {
+  test('JWT에 iat가 있으면 세션 시각으로 사용한다', () {
+    const token = 'eyJhbGciOiJub25lIn0.eyJpYXQiOjE3MTEyMDc4MDB9.signature';
+
+    final issuedAt = resolveDashboardSessionIssuedAt(token: token);
+
+    expect(issuedAt, isNotNull);
+    expect(issuedAt!.toUtc().toIso8601String(), '2024-03-23T15:30:00.000Z');
+  });
+
+  test('cookie mode에서는 profile의 sessionAuthenticatedAt으로 복원한다', () {
+    final profile = UserProfile(
+      id: 'user-1',
+      email: 'qa@example.com',
+      name: 'QA User',
+      phone: '01012345678',
+      department: 'Platform',
+      affiliationType: 'GENERAL',
+      companyCode: '',
+      sessionAuthenticatedAt: '2026-03-23T15:30:00Z',
+    );
+
+    final issuedAt = resolveDashboardSessionIssuedAt(
+      token: null,
+      profile: profile,
+    );
+
+    expect(issuedAt, isNotNull);
+    expect(issuedAt!.toUtc().toIso8601String(), '2026-03-23T15:30:00.000Z');
+  });
+}