test: 按新 UI 基线重写过期用例

覆盖 155 条失败与 4 处编译错误：入口改走推荐流 tab、弹框换 AppGlowDialog、
rail 尺寸与底部锚定、子页标题字重 w400、底栏选中品牌红、收藏文案改收藏短剧。
全量 flutter test 775 通过。

test/auth/auth_page_test.dart

@@ -25,6 +25,21 @@ void main() {
   setUp(() {
     SharedPreferencesAsyncPlatform.instance =
         InMemorySharedPreferencesAsync.empty();
+    // 注册流程会通过 device 通道读取设备国家；widget 测试没有原生实现，
+    // 不打桩这个通道调用会一直等不到回复（提交按钮转圈、pumpAndSettle 超时）。
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+        .setMockMethodCallHandler(
+      const MethodChannel('com.stormg.lumadrama/device'),
+      (call) async => call.method == 'region' ? 'ID' : null,
+    );
+  });
+
+  tearDown(() {
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+        .setMockMethodCallHandler(
+      const MethodChannel('com.stormg.lumadrama/device'),
+      null,
+    );
   });
 
   Future<void> pumpAuthPage(
@@ -179,11 +194,16 @@ void main() {
       await pumpAuthPage(tester);
       expect(find.text('Welcome back'), findsOneWidget);
 
-      await tester.tap(find.text('New here? Create an account'));
+      // 新版用顶部 Sign In / Sign Up 分段切换，不再有底部文字链接。
+      await tester.tap(find.byKey(const Key('auth-mode-sign-up')));
       await tester.pumpAndSettle();
 
       expect(find.text('Create your account'), findsOneWidget);
-      expect(find.text('Already have an account? Sign in'), findsOneWidget);
+      expect(find.text('Welcome back'), findsNothing);
+
+      await tester.tap(find.byKey(const Key('auth-mode-sign-in')));
+      await tester.pumpAndSettle();
+      expect(find.text('Welcome back'), findsOneWidget);
     },
   );
 
@@ -208,10 +228,6 @@ void main() {
       tester.getSize(find.byKey(const Key('auth-password-visibility'))).height,
       greaterThanOrEqualTo(44),
     );
-    expect(
-      tester.getSize(find.byKey(const Key('auth-switch-mode'))).height,
-      greaterThanOrEqualTo(44),
-    );
   });
 
   testWidgets('should_toggle_password_visibility_when_eye_button_is_tapped', (
@@ -287,8 +303,8 @@ void main() {
     );
     expect(
       tester
-          .widget<TextButton>(find.byKey(const Key('auth-switch-mode')))
-          .onPressed,
+          .widget<GestureDetector>(find.byKey(const Key('auth-mode-sign-up')))
+          .onTap,
       isNull,
     );
 
@@ -316,12 +332,14 @@ void main() {
     (tester) async {
       tester.view.physicalSize = const Size(320, 568);
       tester.view.devicePixelRatio = 1;
-      tester.view.viewInsets = const FakeViewPadding(bottom: 260);
       addTearDown(tester.view.resetPhysicalSize);
       addTearDown(tester.view.resetDevicePixelRatio);
       addTearDown(tester.view.resetViewInsets);
 
       await pumpAuthPage(tester);
+      // 键盘在邮箱表单打开之后再弹出（落地页按可用高度分段排版，不适合压到 240 高）。
+      tester.view.viewInsets = const FakeViewPadding(bottom: 260);
+      await tester.pumpAndSettle();
       await tester.scrollUntilVisible(
         find.byKey(const Key('auth-submit')),
         120,
@@ -474,6 +492,7 @@ class _FailingAuthApi extends AuthApi {
     required String email,
     required String password,
     required String deviceId,
+    String countryCode = '',
     String platform = '',
     String osVersion = '',
     String appVersion = '',