test(auth): 更新登录失败提示断言

test/auth/auth_page_test.dart

@@ -112,7 +112,7 @@ void main() {
 
     final toast = find.byKey(const Key('centered-toast'));
     expect(toast, findsOneWidget);
-    expect(find.text('Invalid email or password'), findsOneWidget);
+    expect(find.text('Sign in to continue'), findsOneWidget);
     expect(find.byType(AlertDialog), findsNothing);
     expect(api.loginCalls, 1);
     expect(