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_visual_test.dart

@@ -13,7 +13,6 @@ import 'package:fruitshorts/core/data/services/auth_controller.dart';
 import 'package:fruitshorts/core/data/services/auth_session_store.dart';
 import 'package:fruitshorts/core/platform/haptics.dart';
 import 'package:fruitshorts/core/theme/app_colors.dart';
-import 'package:fruitshorts/core/theme/app_dimens.dart';
 import 'package:fruitshorts/l10n/app_localizations.dart';
 import 'package:fruitshorts/pages/auth/auth_view.dart';
 
@@ -78,13 +77,13 @@ void main() {
 
       expect(find.byKey(const Key('auth-landing')), findsOneWidget);
       expect(find.text('FruitShorts'), findsOneWidget);
-      expect(
-        find.text('Sign in to sync progress, favorites and coins'),
-        findsOneWidget,
-      );
+      final brand = tester.widget<Text>(find.text('FruitShorts'));
+      expect(brand.style?.fontSize, 26);
+      expect(brand.style?.fontWeight, FontWeight.w700);
+      expect(brand.style?.letterSpacing, 2);
       expect(
         tester.getSize(find.byKey(const Key('auth-brand-logo'))),
-        const Size(72, 72),
+        const Size(88, 88),
       );
       expect(find.byKey(const Key('auth-entry-google')), findsNothing);
       expect(find.byKey(const Key('auth-entry-phone')), findsOneWidget);
@@ -92,11 +91,11 @@ void main() {
       expect(find.byKey(const Key('auth-legal')), findsOneWidget);
       expect(
         tester.getSize(find.byKey(const Key('auth-entry-phone'))).height,
-        50,
+        52,
       );
       expect(
         tester.getSize(find.byKey(const Key('auth-entry-email'))).height,
-        50,
+        52,
       );
       final phoneButton = tester.widget<Material>(
         find.descendant(
@@ -104,67 +103,68 @@ void main() {
           matching: find.byType(Material),
         ),
       );
-      expect(phoneButton.color, AppColors.blue);
+      expect(phoneButton.color, AppColors.brandRed);
+      expect(
+        (phoneButton.shape! as RoundedRectangleBorder).borderRadius,
+        BorderRadius.circular(26),
+      );
       final emailButton = tester.widget<Material>(
         find.descendant(
           of: find.byKey(const Key('auth-entry-email')),
           matching: find.byType(Material),
         ),
       );
-      expect(emailButton.color, AppColors.card);
-      expect(
-        (emailButton.shape! as RoundedRectangleBorder).side.color,
-        AppColors.border,
-      );
+      // 次按钮是「白 6%」玻璃拟态，不再有描边。
+      expect(emailButton.color, Colors.white.withValues(alpha: 0.06));
 
-      final glow = tester.widget<Container>(
-        find.byKey(const Key('auth-background-glow')),
+      final glow = tester.widget<DecoratedBox>(
+        find.byKey(const Key('auth-red-glow')),
       );
-      final glowDecoration = glow.decoration! as BoxDecoration;
+      final glowDecoration = glow.decoration as BoxDecoration;
       final gradient = glowDecoration.gradient! as RadialGradient;
-      expect(gradient.colors.first, AppColors.surfaceTop);
-      expect(gradient.colors.last.a, 0);
+      expect(gradient.colors, const [
+        AppColors.primaryBorder,
+        AppColors.transparent,
+      ]);
 
       await tester.tap(find.byKey(const Key('auth-entry-email')));
       await tester.pumpAndSettle();
 
-      final card = tester.widget<Container>(find.byKey(const Key('auth-card')));
-      final cardDecoration = card.decoration! as BoxDecoration;
-      expect(cardDecoration.color, AppColors.card);
-      expect(
-        cardDecoration.borderRadius,
-        BorderRadius.circular(AppDimens.authCardRadius),
-      );
-      expect(cardDecoration.boxShadow, isNull);
-      expect(card.padding, const EdgeInsets.all(20));
+      // 新版表单不再套卡片盒子，直接排在光晕背景上。
+      expect(find.byKey(const Key('auth-card')), findsOneWidget);
 
       final email = tester.widget<TextField>(
         find.byKey(const Key('auth-email')),
       );
-      expect(email.decoration?.fillColor, AppColors.card);
+      expect(
+        email.decoration?.fillColor,
+        Colors.white.withValues(alpha: 0.05),
+      );
       expect(email.style?.color, AppColors.onSurface);
       expect(email.style?.fontSize, 15);
-      expect(email.cursorColor, AppColors.blue);
+      expect(email.cursorColor, AppColors.brandRed);
       expect(tester.getSize(find.byKey(const Key('auth-email'))).height, 52);
       final emailBorder =
           email.decoration!.enabledBorder! as OutlineInputBorder;
-      expect(emailBorder.borderRadius, BorderRadius.circular(14));
-      expect(emailBorder.borderSide.color, AppColors.border);
-      expect(emailBorder.borderSide.width, 1);
+      expect(emailBorder.borderRadius, BorderRadius.circular(12));
+      expect(emailBorder.borderSide, BorderSide.none);
       final password = tester.widget<TextField>(
         find.byKey(const Key('auth-password')),
       );
       expect(password.style?.color, AppColors.onSurface);
       expect(password.style?.fontSize, 15);
-      expect(password.cursorColor, AppColors.blue);
+      expect(password.cursorColor, AppColors.brandRed);
 
       final submit = tester.widget<FilledButton>(
         find.byKey(const Key('auth-submit')),
       );
-      expect(submit.style!.backgroundColor!.resolve(const {}), AppColors.blue);
+      expect(
+        submit.style!.backgroundColor!.resolve(const {}),
+        AppColors.brandRed,
+      );
       expect(
         submit.style!.backgroundColor!.resolve(const {WidgetState.pressed}),
-        AppColors.bluePressed,
+        AppColors.brandRedPressed,
       );
       expect(tester.getSize(find.byKey(const Key('auth-submit'))).height, 50);
       expect(
@@ -201,9 +201,14 @@ void main() {
         (image.image as AssetImage).assetName,
         'assets/icon/fruitshorts.png',
       );
+      // 新版落地页用三等分 Spacer 排版，Logo 居中且落在两个入口按钮上方。
+      final logo = find.byKey(const Key('auth-brand-logo'));
+      expect(tester.getCenter(logo).dx, closeTo(195, 0.1));
       expect(
-        tester.getTopLeft(find.byKey(const Key('auth-brand-logo'))).dy,
-        84,
+        tester.getBottomLeft(logo).dy,
+        lessThan(
+          tester.getTopLeft(find.byKey(const Key('auth-entry-phone'))).dy,
+        ),
       );
     },
   );
@@ -250,7 +255,7 @@ void main() {
 
       expect(find.text('Create your account'), findsOneWidget);
       expect(find.text('Welcome back'), findsNothing);
-      expect(_segmentColor(tester, 'auth-mode-sign-up'), AppColors.blue);
+      expect(_segmentColor(tester, 'auth-mode-sign-up'), AppColors.brandRed);
       expect(_segmentColor(tester, 'auth-mode-sign-in'), Colors.transparent);
 
       await tester.tap(find.byKey(const Key('auth-mode-sign-in')));
@@ -258,7 +263,7 @@ void main() {
 
       expect(find.text('Welcome back'), findsOneWidget);
       expect(find.text('Create your account'), findsNothing);
-      expect(_segmentColor(tester, 'auth-mode-sign-in'), AppColors.blue);
+      expect(_segmentColor(tester, 'auth-mode-sign-in'), AppColors.brandRed);
       expect(_segmentColor(tester, 'auth-mode-sign-up'), Colors.transparent);
     },
   );
@@ -330,8 +335,10 @@ 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,
       );
       expect(
@@ -379,10 +386,10 @@ void main() {
 
 Color? _segmentColor(WidgetTester tester, String key) {
   final segment = find.byKey(Key(key));
-  final animated = tester.widget<AnimatedContainer>(
-    find.descendant(of: segment, matching: find.byType(AnimatedContainer)),
+  final underline = tester.widget<Container>(
+    find.descendant(of: segment, matching: find.byType(Container)),
   );
-  return (animated.decoration! as BoxDecoration).color;
+  return (underline.decoration! as BoxDecoration).color;
 }
 
 class _PendingAuthApi extends AuthApi {