userfront 로그인 후 /dashboard로 이동하게 변경

userfront/test/dashboard_screen_smoke_test.dart

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+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:userfront/core/services/auth_token_store.dart';
+import 'package:userfront/features/dashboard/presentation/dashboard_screen.dart';
+
+void main() {
+  setUp(() {
+    AuthTokenStore.clear();
+  });
+
+  tearDown(() {
+    AuthTokenStore.clear();
+  });
+
+  testWidgets('대시보드는 로그인 토큰이 있으면 크래시 없이 기본 프레임을 렌더링한다', (tester) async {
+    final recordedErrors = <FlutterErrorDetails>[];
+    final previousOnError = FlutterError.onError;
+    FlutterError.onError = (details) {
+      final text = details.exceptionAsString();
+      if (text.contains('A RenderFlex overflowed')) {
+        return;
+      }
+      recordedErrors.add(details);
+    };
+    addTearDown(() {
+      FlutterError.onError = previousOnError;
+    });
+
+    tester.view.devicePixelRatio = 1.0;
+    tester.view.physicalSize = const Size(1920, 1080);
+    addTearDown(tester.view.resetPhysicalSize);
+    addTearDown(tester.view.resetDevicePixelRatio);
+
+    AuthTokenStore.setToken('smoke-token', provider: 'ory');
+
+    await tester.pumpWidget(
+      const ProviderScope(child: MaterialApp(home: DashboardScreen())),
+    );
+    await tester.pump();
+
+    expect(find.byType(Scaffold), findsOneWidget);
+    final hasNullCheckCrash = recordedErrors.any(
+      (error) => error.exceptionAsString().contains(
+        'Null check operator used on a null value',
+      ),
+    );
+    expect(hasNullCheckCrash, isFalse);
+  });
+}