로컬/CI 테스트 동기화

userfront/test/error_screen_test.dart

@@ -143,4 +143,54 @@ void main() {
     expect(find.text('원문 메시지'), findsNothing);
     expect(find.text(type), findsOneWidget);
   });
+
+  testWidgets('프로덕션은 not_found 코드를 whitelist 메시지로 노출한다 (404 매핑)', (
+    WidgetTester tester,
+  ) async {
+    await _pumpErrorScreen(
+      tester,
+      errorCode: 'not_found',
+      description: '원문 메시지',
+      isProdOverride: true,
+    );
+
+    final detail = tr(
+      'msg.userfront.error.whitelist.not_found',
+      fallback: internalErrorWhitelistMessages['not_found']!,
+    );
+    final type = tr(
+      'msg.userfront.error.type',
+      fallback: '오류 종류: {{type}}',
+      params: {'type': 'not_found'},
+    );
+
+    expect(find.text(detail), findsOneWidget);
+    expect(find.text(type), findsOneWidget);
+    expect(find.text('원문 메시지'), findsNothing);
+  });
+
+  testWidgets('프로덕션은 rate_limited 코드를 whitelist 메시지로 노출한다 (429 매핑)', (
+    WidgetTester tester,
+  ) async {
+    await _pumpErrorScreen(
+      tester,
+      errorCode: 'rate_limited',
+      description: '원문 메시지',
+      isProdOverride: true,
+    );
+
+    final detail = tr(
+      'msg.userfront.error.whitelist.rate_limited',
+      fallback: internalErrorWhitelistMessages['rate_limited']!,
+    );
+    final type = tr(
+      'msg.userfront.error.type',
+      fallback: '오류 종류: {{type}}',
+      params: {'type': 'rate_limited'},
+    );
+
+    expect(find.text(detail), findsOneWidget);
+    expect(find.text(type), findsOneWidget);
+    expect(find.text('원문 메시지'), findsNothing);
+  });
 }