feat(auth): 登录页改为 ymb 品牌并支持后台配置背景图

test/auth/auth_visual_test.dart

@@ -9,13 +9,16 @@ import 'package:shared_preferences_platform_interface/shared_preferences_async_p
 import 'package:fruitshorts/core/data/models/auth_session.dart';
 import 'package:fruitshorts/core/data/remote/api_client.dart';
 import 'package:fruitshorts/core/data/remote/auth_api.dart';
+import 'package:fruitshorts/core/data/services/app_config_controller.dart';
 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/widgets/remote_image.dart';
 import 'package:fruitshorts/l10n/app_localizations.dart';
 import 'package:fruitshorts/pages/auth/auth_view.dart';
 
+import '../support/fake_app_config.dart';
 import '../support/fake_haptics.dart';
 import '../support/fake_http_adapter.dart';
 
@@ -29,6 +32,7 @@ void main() {
     WidgetTester tester, {
     AuthApi? api,
     FakeHaptics? haptics,
+    String loginBackgroundUrl = '',
     bool openEmail = true,
     bool asRoute = false,
   }) async {
@@ -44,10 +48,14 @@ void main() {
           ),
       AuthSessionStore(),
     );
+    final appConfig = await fakeAppConfigController(
+      loginBackgroundUrl: loginBackgroundUrl,
+    );
     await tester.pumpWidget(
       MultiProvider(
         providers: [
           ChangeNotifierProvider<AuthController>.value(value: auth),
+          ChangeNotifierProvider<AppConfigController>.value(value: appConfig),
           Provider<Haptics>.value(value: haptics ?? FakeHaptics()),
         ],
         child: MaterialApp(
@@ -76,11 +84,8 @@ void main() {
       await pumpAuthPage(tester, openEmail: false);
 
       expect(find.byKey(const Key('auth-landing')), findsOneWidget);
-      expect(find.text('FruitShorts'), 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);
+      // 落地页只留图标，不再显示品牌文字。
+      expect(find.text('ymb'), findsNothing);
       expect(
         tester.getSize(find.byKey(const Key('auth-brand-logo'))),
         const Size(88, 88),
@@ -136,10 +141,7 @@ void main() {
       final email = tester.widget<TextField>(
         find.byKey(const Key('auth-email')),
       );
-      expect(
-        email.decoration?.fillColor,
-        Colors.white.withValues(alpha: 0.05),
-      );
+      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.brandRed);
@@ -182,37 +184,63 @@ void main() {
     },
   );
 
+  testWidgets('should_use_backend_login_background_when_configured', (
+    tester,
+  ) async {
+    await pumpAuthPage(
+      tester,
+      openEmail: false,
+      loginBackgroundUrl: '/files/login_bg/bg.jpg',
+    );
+
+    final backdrop = tester.widget<RemoteImage>(
+      find.byKey(const Key('auth-poster-backdrop')),
+    );
+    expect(backdrop.path, '/files/login_bg/bg.jpg');
+  });
+
   testWidgets(
-    'should_show_app_logo_lower_on_the_page_when_landing_opens',
+    'should_fall_back_to_bundled_login_background_when_not_configured',
     (tester) async {
-      tester.view.physicalSize = const Size(390, 844);
-      tester.view.devicePixelRatio = 1;
-      addTearDown(tester.view.resetPhysicalSize);
-      addTearDown(tester.view.resetDevicePixelRatio);
       await pumpAuthPage(tester, openEmail: false);
 
-      final image = tester.widget<Image>(
-        find.descendant(
-          of: find.byKey(const Key('auth-brand-logo')),
-          matching: find.byType(Image),
-        ),
+      final backdrop = tester.widget<RemoteImage>(
+        find.byKey(const Key('auth-poster-backdrop')),
       );
+      expect(backdrop.path, isEmpty);
+      // 兜底图是我们塞给 RemoteImage 的 fallbackWidget，用 auth-poster-default 定位。
       expect(
-        (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.getBottomLeft(logo).dy,
-        lessThan(
-          tester.getTopLeft(find.byKey(const Key('auth-entry-phone'))).dy,
-        ),
+        find.byKey(const Key('auth-poster-default')),
+        findsOneWidget,
       );
     },
   );
 
+  testWidgets('should_show_app_logo_lower_on_the_page_when_landing_opens', (
+    tester,
+  ) async {
+    tester.view.physicalSize = const Size(390, 844);
+    tester.view.devicePixelRatio = 1;
+    addTearDown(tester.view.resetPhysicalSize);
+    addTearDown(tester.view.resetDevicePixelRatio);
+    await pumpAuthPage(tester, openEmail: false);
+
+    final image = tester.widget<Image>(
+      find.descendant(
+        of: find.byKey(const Key('auth-brand-logo')),
+        matching: find.byType(Image),
+      ),
+    );
+    expect((image.image as AssetImage).assetName, 'assets/icon/ymb.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.getBottomLeft(logo).dy,
+      lessThan(tester.getTopLeft(find.byKey(const Key('auth-entry-phone'))).dy),
+    );
+  });
+
   testWidgets('should_render_40px_back_button_when_page_is_pushed', (
     tester,
   ) async {
@@ -335,9 +363,7 @@ void main() {
       );
       expect(
         tester
-            .widget<GestureDetector>(
-              find.byKey(const Key('auth-mode-sign-up')),
-            )
+            .widget<GestureDetector>(find.byKey(const Key('auth-mode-sign-up')))
             .onTap,
         isNull,
       );