feat(auth): 登录页改为 ymb 品牌并支持后台配置背景图

README.md

@@ -81,12 +81,15 @@ Android 模拟器访问宿主机时，同样在调试条里填 `http://10.0.2.2:
 
 ### iOS
 
-手机与 Mac 需在同一网络，首次启动允许“本地网络”权限：
+iOS 模拟器直接访问 Mac 本机服务，默认地址为 `http://127.0.0.1:8081`：
 
 ```bash
-flutter run -d <udid>
+flutter run -d <simulator-udid>
 ```
 
+iPhone 真机不能用 `127.0.0.1` 访问 Mac；真机联调时需让手机与 Mac 位于同一网络，
+并通过调试入口临时填写 Mac 的局域网地址。
+
 ### 服务地址配置
 
 地址是代码里的一个开关，**不做任何网络探测**，也不用传构建参数。两套环境各占
@@ -94,7 +97,7 @@ flutter run -d <udid>
 
 | 文件 | 用途 | 默认值 |
 | --- | --- | --- |
-| `lib/core/config/dev_config.dart` | 开发 / 联调 | `http://192.168.31.243:8081` |
+| `lib/core/config/dev_config.dart` | 开发 / 联调 | `http://127.0.0.1:8081` |
 | `lib/core/config/prod_config.dart` | 生产 | `http://39.162.50.99:8081` |
 
 切换环境只改 `lib/core/config/app_config.dart` 里的一个布尔值：
@@ -103,7 +106,7 @@ flutter run -d <udid>
 static const bool useDevConfig = true; // false 即用生产地址
 ```
 
-换 Wi-Fi 或换网段时只改 `dev_config.dart` 的 `baseUrl`。打生产包前把
+真机或 Android 模拟器联调时，通过调试入口覆盖地址，不修改默认开发配置。打生产包前把
 `useDevConfig` 改成 `false`；release 构建若仍为 `true` 会在启动时直接报错，
 避免线上包连到开发机。
 

lib/app.dart

@@ -14,6 +14,7 @@ import 'core/data/remote/catalog_api.dart';
 import 'core/data/remote/category_api.dart';
 import 'core/data/remote/comment_api.dart';
 import 'core/data/remote/commerce_api.dart';
+import 'core/data/remote/config_api.dart';
 import 'core/data/remote/device_profile.dart';
 import 'core/data/remote/download_api.dart';
 import 'core/data/remote/interaction_api.dart';
@@ -35,6 +36,7 @@ import 'core/data/repositories/playlist_repository.dart';
 import 'core/data/repositories/search_repository.dart';
 import 'core/data/repositories/store_repository.dart';
 import 'core/data/repositories/watch_history_repository.dart';
+import 'core/data/services/app_config_controller.dart';
 import 'core/data/services/auth_controller.dart';
 import 'core/data/services/auth_session_store.dart';
 import 'core/data/services/catalog_controller.dart';
@@ -208,6 +210,11 @@ class _LumaDramaAppState extends State<LumaDramaApp> {
 
   late final LocaleController _localeController = LocaleController();
 
+  /// 后台下发的启动配置（登录页背景等）；拉不到就用本地默认。
+  late final AppConfigController _appConfigController = AppConfigController(
+    ConfigApi(_apiClient),
+  );
+
   /// 登录期内共享的「已解锁收费集」：播放页进出、feed 与全屏切换都要沿用。
   late final UnlockedEpisodeRegistry _unlockedEpisodes =
       UnlockedEpisodeRegistry();
@@ -218,6 +225,7 @@ class _LumaDramaAppState extends State<LumaDramaApp> {
     // 恢复本地令牌与设备号；未登录也能正常浏览，不阻塞首屏
     _auth.load();
     unawaited(_localeController.load());
+    unawaited(_appConfigController.load());
     // 登录/登出时同步收藏状态：收藏属于账号，不能跨账号串联
     _auth.addListener(_onAuthChanged);
     unawaited(_favoriteController.load());
@@ -252,6 +260,7 @@ class _LumaDramaAppState extends State<LumaDramaApp> {
     _walletController.dispose();
     _interactionController.dispose();
     _localeController.dispose();
+    _appConfigController.dispose();
     _apiClient.close();
     super.dispose();
   }
@@ -304,6 +313,7 @@ class _LumaDramaAppState extends State<LumaDramaApp> {
         ChangeNotifierProvider.value(value: _walletController),
         ChangeNotifierProvider.value(value: _interactionController),
         ChangeNotifierProvider.value(value: _localeController),
+        ChangeNotifierProvider.value(value: _appConfigController),
         ChangeNotifierProvider.value(value: _auth),
       ],
       child: Consumer<LocaleController>(

lib/core/config/dev_config.dart

@@ -2,8 +2,9 @@
 
 /// 开发环境配置。
 ///
-/// 本机联调用：换 Wi-Fi、换网段后只改这里的 [baseUrl]，地址不要带结尾斜杠。
+/// 本机联调用：模拟器与桌面端可直接用回环地址，但 iOS/Android 真机必须用
+/// 开发机的局域网 IP（真机上的 127.0.0.1 指向手机自己）。地址不要带结尾斜杠。
 abstract final class DevConfig {
-  /// 开发机后端地址。
+  /// 开发机后端地址（Mac 当前 Wi-Fi 地址，换网络后需要同步修改）。
   static const String baseUrl = 'http://192.168.31.243:8081';
 }

lib/core/data/remote/config_api.dart

@@ -0,0 +1,16 @@
+// Author: fruit.com.cn
+
+import 'api_client.dart';
+
+/// 启动配置：`GET /app/config`（匿名，后台只下发白名单键）。
+class ConfigApi {
+  const ConfigApi(this._client);
+
+  final ApiClient _client;
+
+  /// 白名单配置表；结构异常时返回空表，调用方按本地默认处理。
+  Future<Map<String, dynamic>> appConfig() async {
+    final data = await _client.get('/app/config');
+    return data is Map<String, dynamic> ? data : const <String, dynamic>{};
+  }
+}

lib/core/data/services/app_config_controller.dart

@@ -0,0 +1,31 @@
+// Author: fruit.com.cn
+
+import 'package:flutter/foundation.dart';
+
+import '../remote/config_api.dart';
+
+/// 后台下发的启动配置。
+///
+/// 失败一律静默：拿不到就用 App 内置默认，不阻塞启动、不弹错。
+class AppConfigController extends ChangeNotifier {
+  AppConfigController(this._api);
+
+  final ConfigApi _api;
+
+  String _loginBackgroundUrl = '';
+
+  /// 登录页整屏背景图；空串表示用本地默认图。
+  String get loginBackgroundUrl => _loginBackgroundUrl;
+
+  Future<void> load() async {
+    try {
+      final config = await _api.appConfig();
+      final url = (config['loginBackgroundUrl'] as String? ?? '').trim();
+      if (url == _loginBackgroundUrl) return;
+      _loginBackgroundUrl = url;
+      notifyListeners();
+    } catch (error) {
+      debugPrint('[config] load failed: $error');
+    }
+  }
+}

lib/core/widgets/remote_image.dart

@@ -35,6 +35,7 @@ class RemoteImage extends StatelessWidget {
     this.fallbackIconKey,
     this.fallbackAspectRatio,
     this.fallbackColor = AppColors.raised,
+    this.fallbackWidget,
     this.decodeWidth,
     this.decodeHeight,
   });
@@ -47,6 +48,9 @@ class RemoteImage extends StatelessWidget {
   final Key? fallbackIconKey;
   final double? fallbackAspectRatio;
   final Color fallbackColor;
+
+  /// 自定义兜底：地址为空、加载中、加载失败时都显示它（优先于 [fallbackColor]）。
+  final Widget? fallbackWidget;
   final int? decodeWidth;
   final int? decodeHeight;
 
@@ -77,9 +81,9 @@ class RemoteImage extends StatelessWidget {
         // cover/contain 本身会保持宽高比，此时若同时强制 cacheWidth 和
         // cacheHeight，解码会把竖版图强行拉成横版像素。只在显式指定了
         // decodeHeight、或 fit 不保持宽高比时才限定解码高度。
-        final keepsAspectRatio =
+        final keepsAspectRatio = fit == BoxFit.cover || fit == BoxFit.contain;
-            fit == BoxFit.cover || fit == BoxFit.contain;
+        final cacheHeight =
-        final cacheHeight = decodeHeight ??
+            decodeHeight ??
             (keepsAspectRatio || inferredHeight == null
                 ? null
                 : resolveImageDecodePixels(inferredHeight, pixelRatio));
@@ -106,6 +110,8 @@ class RemoteImage extends StatelessWidget {
   }
 
   Widget _fallback({required bool brand}) {
+    final custom = fallbackWidget;
+    if (custom != null) return custom;
     final mark = brand
         ? LayoutBuilder(
             builder: (context, constraints) {

lib/l10n/app_en.arb

@@ -1,6 +1,6 @@
 {
   "@@locale": "en",
-  "appName": "FruitShorts",
+  "appName": "ymb",
   "demo": "DEMO",
   "homeHeadline": "Watch now",
   "homeSubtitle": "Free short drama preview.",
@@ -19,7 +19,7 @@
   "searchCancel": "Cancel",
   "featured": "Featured",
   "recommended": "Recommended",
-  "fruitShortsBrand": "FruitShorts",
+  "fruitShortsBrand": "ymb",
   "comingSoon": "Coming soon",
   "authLegal": "By continuing, you agree to the Terms of Service and Privacy Policy.",
   "authLegalLead": "By continuing, you agree to the",
@@ -408,8 +408,8 @@
   "genreDramaMystery": "Drama · Mystery",
   "continueWatchingHeading": "CONTINUE WATCHING",
   "preferencesHeading": "PREFERENCES",
-  "brandMark": "FRUITSHORTS",
+  "brandMark": "YMB",
-  "shareFooter": "FruitShorts",
+  "shareFooter": "ymb",
   "shortsTab": "Shorts",
   "myListTab": "My List",
   "watchFull": "Watch Full",
@@ -789,7 +789,7 @@
   "offlineDownloads": "Downloads",
   "watchPreferences": "Watch preferences",
   "contactSupport": "Contact support",
-  "vipBrandName": "FruitShorts VIP",
+  "vipBrandName": "VIP",
   "vipOpenNow": "Get VIP",
   "vipBenefitFree": "Free full access",
   "vipBenefitNoAds": "Ad-free viewing",
@@ -851,6 +851,7 @@
   "dataUnavailable": "—",
   "commonQuestions": "Common questions",
   "aboutUs": "About us",
+  "aboutBrandName": "Your mini business",
   "aboutDescription": "A focused, immersive place to watch short dramas.",
   "versionLabel": "Version {version}",
   "@versionLabel": {

lib/l10n/app_id.arb

@@ -1,6 +1,6 @@
 {
   "@@locale": "id",
-  "appName": "FruitShorts",
+  "appName": "ymb",
   "demo": "Demo",
   "homeHeadline": "Tonton sekarang",
   "homeSubtitle": "Pratinjau drama pendek gratis.",
@@ -19,7 +19,7 @@
   "searchCancel": "Batal",
   "featured": "Unggulan",
   "recommended": "Rekomendasi",
-  "fruitShortsBrand": "FruitShorts",
+  "fruitShortsBrand": "ymb",
   "comingSoon": "Segera hadir",
   "authLegal": "Dengan melanjutkan, Anda menyetujui Ketentuan Layanan dan Kebijakan Privasi.",
   "authLegalLead": "Dengan melanjutkan, Anda menyetujui",
@@ -387,8 +387,8 @@
   "genreDramaMystery": "Drama · Misteri",
   "continueWatchingHeading": "LANJUT TONTON",
   "preferencesHeading": "PREFERENSI",
-  "brandMark": "FRUITSHORTS",
+  "brandMark": "YMB",
-  "shareFooter": "FruitShorts",
+  "shareFooter": "ymb",
   "shortsTab": "Drama Pendek",
   "myListTab": "Daftar Saya",
   "watchFull": "Tonton Penuh",
@@ -751,7 +751,7 @@
   "offlineDownloads": "Unduhan",
   "watchPreferences": "Preferensi tontonan",
   "contactSupport": "Hubungi dukungan",
-  "vipBrandName": "FruitShorts VIP",
+  "vipBrandName": "VIP",
   "vipOpenNow": "Buka VIP",
   "vipBenefitFree": "Nonton semua gratis",
   "vipBenefitNoAds": "Bebas iklan",
@@ -813,6 +813,7 @@
   "dataUnavailable": "—",
   "commonQuestions": "Pertanyaan umum",
   "aboutUs": "Tentang kami",
+  "aboutBrandName": "Your mini business",
   "aboutDescription": "Tempat fokus dan imersif untuk menonton drama pendek.",
   "versionLabel": "Versi {version}",
   "@versionLabel": {

lib/l10n/app_localizations.dart

@@ -103,7 +103,7 @@ abstract class AppLocalizations {
   /// No description provided for @appName.
   ///
   /// In en, this message translates to:
-  /// **'FruitShorts'**
+  /// **'ymb'**
   String get appName;
 
   /// No description provided for @demo.
@@ -217,7 +217,7 @@ abstract class AppLocalizations {
   /// No description provided for @fruitShortsBrand.
   ///
   /// In en, this message translates to:
-  /// **'FruitShorts'**
+  /// **'ymb'**
   String get fruitShortsBrand;
 
   /// No description provided for @comingSoon.
@@ -1627,13 +1627,13 @@ abstract class AppLocalizations {
   /// No description provided for @brandMark.
   ///
   /// In en, this message translates to:
-  /// **'FRUITSHORTS'**
+  /// **'YMB'**
   String get brandMark;
 
   /// No description provided for @shareFooter.
   ///
   /// In en, this message translates to:
-  /// **'FruitShorts'**
+  /// **'ymb'**
   String get shareFooter;
 
   /// No description provided for @shortsTab.
@@ -3439,7 +3439,7 @@ abstract class AppLocalizations {
   /// No description provided for @vipBrandName.
   ///
   /// In en, this message translates to:
-  /// **'FruitShorts VIP'**
+  /// **'VIP'**
   String get vipBrandName;
 
   /// No description provided for @vipOpenNow.
@@ -3592,6 +3592,12 @@ abstract class AppLocalizations {
   /// **'About us'**
   String get aboutUs;
 
+  /// No description provided for @aboutBrandName.
+  ///
+  /// In en, this message translates to:
+  /// **'Your mini business'**
+  String get aboutBrandName;
+
   /// No description provided for @aboutDescription.
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_en.dart

@@ -9,7 +9,7 @@ class AppLocalizationsEn extends AppLocalizations {
   AppLocalizationsEn([String locale = 'en']) : super(locale);
 
   @override
-  String get appName => 'FruitShorts';
+  String get appName => 'ymb';
 
   @override
   String get demo => 'DEMO';
@@ -67,7 +67,7 @@ class AppLocalizationsEn extends AppLocalizations {
   String get recommended => 'Recommended';
 
   @override
-  String get fruitShortsBrand => 'FruitShorts';
+  String get fruitShortsBrand => 'ymb';
 
   @override
   String get comingSoon => 'Coming soon';
@@ -831,10 +831,10 @@ class AppLocalizationsEn extends AppLocalizations {
   String get preferencesHeading => 'PREFERENCES';
 
   @override
-  String get brandMark => 'FRUITSHORTS';
+  String get brandMark => 'YMB';
 
   @override
-  String get shareFooter => 'FruitShorts';
+  String get shareFooter => 'ymb';
 
   @override
   String get shortsTab => 'Shorts';
@@ -1795,7 +1795,7 @@ class AppLocalizationsEn extends AppLocalizations {
   String get contactSupport => 'Contact support';
 
   @override
-  String get vipBrandName => 'FruitShorts VIP';
+  String get vipBrandName => 'VIP';
 
   @override
   String get vipOpenNow => 'Get VIP';
@@ -1886,6 +1886,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get aboutUs => 'About us';
 
+  @override
+  String get aboutBrandName => 'Your mini business';
+
   @override
   String get aboutDescription =>
       'A focused, immersive place to watch short dramas.';

lib/l10n/app_localizations_id.dart

@@ -9,7 +9,7 @@ class AppLocalizationsId extends AppLocalizations {
   AppLocalizationsId([String locale = 'id']) : super(locale);
 
   @override
-  String get appName => 'FruitShorts';
+  String get appName => 'ymb';
 
   @override
   String get demo => 'Demo';
@@ -67,7 +67,7 @@ class AppLocalizationsId extends AppLocalizations {
   String get recommended => 'Rekomendasi';
 
   @override
-  String get fruitShortsBrand => 'FruitShorts';
+  String get fruitShortsBrand => 'ymb';
 
   @override
   String get comingSoon => 'Segera hadir';
@@ -834,10 +834,10 @@ class AppLocalizationsId extends AppLocalizations {
   String get preferencesHeading => 'PREFERENSI';
 
   @override
-  String get brandMark => 'FRUITSHORTS';
+  String get brandMark => 'YMB';
 
   @override
-  String get shareFooter => 'FruitShorts';
+  String get shareFooter => 'ymb';
 
   @override
   String get shortsTab => 'Drama Pendek';
@@ -1797,7 +1797,7 @@ class AppLocalizationsId extends AppLocalizations {
   String get contactSupport => 'Hubungi dukungan';
 
   @override
-  String get vipBrandName => 'FruitShorts VIP';
+  String get vipBrandName => 'VIP';
 
   @override
   String get vipOpenNow => 'Buka VIP';
@@ -1888,6 +1888,9 @@ class AppLocalizationsId extends AppLocalizations {
   @override
   String get aboutUs => 'Tentang kami';
 
+  @override
+  String get aboutBrandName => 'Your mini business';
+
   @override
   String get aboutDescription =>
       'Tempat fokus dan imersif untuk menonton drama pendek.';

lib/l10n/app_localizations_zh.dart

@@ -9,7 +9,7 @@ class AppLocalizationsZh extends AppLocalizations {
   AppLocalizationsZh([String locale = 'zh']) : super(locale);
 
   @override
-  String get appName => 'FruitShorts';
+  String get appName => 'ymb';
 
   @override
   String get demo => '演示';
@@ -66,7 +66,7 @@ class AppLocalizationsZh extends AppLocalizations {
   String get recommended => '推荐';
 
   @override
-  String get fruitShortsBrand => 'FruitShorts';
+  String get fruitShortsBrand => 'ymb';
 
   @override
   String get comingSoon => '即将上线';
@@ -821,10 +821,10 @@ class AppLocalizationsZh extends AppLocalizations {
   String get preferencesHeading => '偏好设置';
 
   @override
-  String get brandMark => 'FRUITSHORTS';
+  String get brandMark => 'YMB';
 
   @override
-  String get shareFooter => 'FruitShorts';
+  String get shareFooter => 'ymb';
 
   @override
   String get shortsTab => '短剧';
@@ -1770,7 +1770,7 @@ class AppLocalizationsZh extends AppLocalizations {
   String get contactSupport => '联系客服';
 
   @override
-  String get vipBrandName => 'FruitShorts VIP';
+  String get vipBrandName => 'VIP';
 
   @override
   String get vipOpenNow => '立即开通';
@@ -1861,6 +1861,9 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get aboutUs => '关于我们';
 
+  @override
+  String get aboutBrandName => 'Your mini business';
+
   @override
   String get aboutDescription => '专注于短剧观看与沉浸式追剧体验。';
 

lib/l10n/app_zh.arb

@@ -1,6 +1,6 @@
 {
   "@@locale": "zh",
-  "appName": "FruitShorts",
+  "appName": "ymb",
   "demo": "演示",
   "homeHeadline": "即刻观看",
   "homeSubtitle": "免费短剧预览。",
@@ -19,7 +19,7 @@
   "searchCancel": "取消",
   "featured": "精选",
   "recommended": "推荐",
-  "fruitShortsBrand": "FruitShorts",
+  "fruitShortsBrand": "ymb",
   "comingSoon": "即将上线",
   "authLegal": "继续即代表同意《用户协议》与《隐私政策》",
   "authLegalLead": "继续即代表同意",
@@ -349,8 +349,8 @@
   "genreDramaMystery": "剧情 · 悬疑",
   "continueWatchingHeading": "继续观看",
   "preferencesHeading": "偏好设置",
-  "brandMark": "FRUITSHORTS",
+  "brandMark": "YMB",
-  "shareFooter": "FruitShorts",
+  "shareFooter": "ymb",
   "shortsTab": "短剧",
   "myListTab": "片单",
   "watchFull": "看全集",
@@ -713,7 +713,7 @@
   "offlineDownloads": "离线缓存",
   "watchPreferences": "观看偏好",
   "contactSupport": "联系客服",
-  "vipBrandName": "FruitShorts VIP",
+  "vipBrandName": "VIP",
   "vipOpenNow": "立即开通",
   "vipBenefitFree": "全剧免费看",
   "vipBenefitNoAds": "免广告打扰",
@@ -775,6 +775,7 @@
   "dataUnavailable": "—",
   "commonQuestions": "常见问题",
   "aboutUs": "关于我们",
+  "aboutBrandName": "Your mini business",
   "aboutDescription": "专注于短剧观看与沉浸式追剧体验。",
   "versionLabel": "版本 {version}",
   "@versionLabel": {

lib/pages/auth/auth_form_widgets.dart

@@ -300,7 +300,7 @@ class _AuthBrand extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final copy = _brandCopy(context, centered: !compact);
+    final copy = _brandCopy(centered: !compact);
     if (compact) {
       return Row(
         key: const Key('auth-brand'),
@@ -324,32 +324,14 @@ class _AuthBrand extends StatelessWidget {
     radius: compact ? _compactBrandMarkRadius : _brandMarkRadius,
   );
 
-  Widget _brandCopy(BuildContext context, {required bool centered}) => Column(
+  Widget _brandCopy({required bool centered}) => Text(
-    crossAxisAlignment: centered
+    tagline,
-        ? CrossAxisAlignment.center
+    textAlign: centered ? TextAlign.center : TextAlign.start,
-        : CrossAxisAlignment.start,
+    style: const TextStyle(
-    children: [
+      color: AppColors.muted,
-      Text(
+      fontSize: 13,
-        AppLocalizations.of(context)!.appName,
+      height: 1.35,
-        textAlign: centered ? TextAlign.center : TextAlign.start,
+    ),
-        style: const TextStyle(
-          color: AppColors.onSurface,
-          fontSize: 24,
-          fontWeight: FontWeight.w700,
-          height: 1.1,
-        ),
-      ),
-      const SizedBox(height: 6),
-      Text(
-        tagline,
-        textAlign: centered ? TextAlign.center : TextAlign.start,
-        style: const TextStyle(
-          color: AppColors.muted,
-          fontSize: 13,
-          height: 1.35,
-        ),
-      ),
-    ],
   );
 }
 

lib/pages/auth/auth_view.dart

@@ -7,6 +7,7 @@ import 'package:provider/provider.dart';
 
 import '../../core/data/remote/api_client.dart';
 import '../../core/formatting/error_text.dart';
+import '../../core/data/services/app_config_controller.dart';
 import '../../core/data/services/auth_controller.dart';
 import '../../core/platform/haptics.dart';
 import '../../core/platform/keyboard_inset.dart';
@@ -14,6 +15,7 @@ import '../../core/theme/app_colors.dart';
 import '../../core/theme/app_dimens.dart';
 import '../../core/theme/app_theme.dart';
 import '../../core/widgets/centered_toast.dart';
+import '../../core/widgets/remote_image.dart';
 import '../../core/widgets/subpage_header.dart';
 import '../../l10n/app_localizations.dart';
 import 'auth_legal_links.dart';
@@ -28,7 +30,7 @@ const double _brandMarkSize = 88;
 const double _compactBrandMarkSize = 48;
 const double _brandMarkRadius = 26;
 const double _compactBrandMarkRadius = 14;
-const String _appLogoAsset = 'assets/icon/fruitshorts.png';
+const String _appLogoAsset = 'assets/icon/ymb.png';
 const double _contentMaxWidth = 440;
 const double _fieldHeight = 52;
 const double _fieldRadius = 12;
@@ -276,9 +278,7 @@ class _AuthPageState extends State<AuthPage> {
               ),
             ),
             // 全屏海报背景：压暗保证文字可读，顶部再叠品牌红光。
-            Positioned.fill(
+            Positioned.fill(child: IgnorePointer(child: _AuthPosterBackdrop())),
-              child: IgnorePointer(child: _AuthPosterBackdrop()),
-            ),
             const Positioned.fill(
               child: IgnorePointer(
                 child: DecoratedBox(
@@ -396,80 +396,67 @@ class _AuthPageState extends State<AuthPage> {
     AppLocalizations l10n, {
     required bool compact,
     required double minHeight,
-  }) =>
+  }) => TweenAnimationBuilder<double>(
-      TweenAnimationBuilder<double>(
+    key: const Key('auth-enter-animation'),
-        key: const Key('auth-enter-animation'),
+    tween: Tween(begin: 0, end: 1),
-        tween: Tween(begin: 0, end: 1),
+    duration: _enterDuration,
-        duration: _enterDuration,
+    curve: Curves.easeOutCubic,
-        curve: Curves.easeOutCubic,
+    builder: (context, value, child) => Opacity(
-        builder: (context, value, child) => Opacity(
+      opacity: value,
-          opacity: value,
+      child: Transform.translate(
-          child: Transform.translate(
+        offset: Offset(0, _enterSlideDistance * (1 - value)),
-            offset: Offset(0, _enterSlideDistance * (1 - value)),
+        child: child,
-            child: child,
+      ),
-          ),
+    ),
-        ),
+    child: _emailEntryOpen
-        child: _emailEntryOpen
+        ? Column(
-            ? Column(
+            crossAxisAlignment: CrossAxisAlignment.stretch,
-                crossAxisAlignment: CrossAxisAlignment.stretch,
+            children: [
-                children: [
+              _AuthBrand(tagline: l10n.authBrandTagline, compact: compact),
-                  _AuthBrand(tagline: l10n.authBrandTagline, compact: compact),
+              SizedBox(height: compact ? _compactBrandGap : 28),
-                  SizedBox(height: compact ? _compactBrandGap : 28),
+              _authCard(l10n),
-                  _authCard(l10n),
+            ],
-                ],
+          )
-              )
+        : _landing(l10n, minHeight: minHeight),
-            : _landing(l10n, minHeight: minHeight),
+  );
-      );
 
   /// 落地页内容需要有限高度才能用 Spacer 三段分割，这里显式钉住可用高度。
   Widget _landing(AppLocalizations l10n, {required double minHeight}) =>
       SizedBox(
         height: minHeight,
         child: Column(
-    key: const Key('auth-landing'),
+          key: const Key('auth-landing'),
-    crossAxisAlignment: CrossAxisAlignment.stretch,
+          crossAxisAlignment: CrossAxisAlignment.stretch,
-    children: [
+          children: [
-      const Spacer(flex: 5),
+            const Spacer(flex: 5),
-      Center(
+            Center(
-        child: _brandMarkWidget(
+              child: _brandMarkWidget(
-          key: const Key('auth-brand-logo'),
+                key: const Key('auth-brand-logo'),
-          size: _brandMarkSize,
+                size: _brandMarkSize,
-          radius: _brandMarkRadius,
+                radius: _brandMarkRadius,
+              ),
+            ),
+            const Spacer(flex: 2),
+            _AuthEntryButton(
+              key: const Key('auth-entry-phone'),
+              label: l10n.authPhoneSignIn,
+              icon: Icons.phone_android_rounded,
+              primary: true,
+              onTap: _openPhoneSheet,
+            ),
+            const SizedBox(height: 12),
+            _AuthEntryButton(
+              key: const Key('auth-entry-email'),
+              label: l10n.authEmailSignIn,
+              icon: Icons.mail_outline_rounded,
+              primary: false,
+              onTap: () => setState(() => _emailEntryOpen = true),
+            ),
+            const SizedBox(height: 14),
+            const Opacity(opacity: 0.75, child: AuthLegalLinks()),
+            const Spacer(flex: 6),
+          ],
         ),
-      ),
-      const SizedBox(height: 10),
-      Text(
-        l10n.fruitShortsBrand,
-        textAlign: TextAlign.center,
-        style: const TextStyle(
-          fontFamily: 'Outfit',
-          color: AppColors.onSurface,
-          fontSize: 26,
-          fontWeight: FontWeight.w700,
-          letterSpacing: 2,
-        ),
-      ),
-      const Spacer(flex: 3),
-      _AuthEntryButton(
-        key: const Key('auth-entry-phone'),
-        label: l10n.authPhoneSignIn,
-        icon: Icons.phone_android_rounded,
-        primary: true,
-        onTap: _openPhoneSheet,
-      ),
-      const SizedBox(height: 12),
-      _AuthEntryButton(
-        key: const Key('auth-entry-email'),
-        label: l10n.authEmailSignIn,
-        icon: Icons.mail_outline_rounded,
-        primary: false,
-        onTap: () => setState(() => _emailEntryOpen = true),
-      ),
-      const SizedBox(height: 14),
-      const Opacity(opacity: 0.75, child: AuthLegalLinks()),
-      const Spacer(flex: 6),
-        ],
-      ),
       );
 
   Future<void> _openPhoneSheet() async {
@@ -578,16 +565,26 @@ class _AuthEntryButton extends StatelessWidget {
 }
 
 /// 登录页全屏海报背景（单张，无拼缝）。
+///
+/// 优先用后台下发的 `loginBackgroundUrl`（后台未配置或加载失败时回落到本地默认图）。
 class _AuthPosterBackdrop extends StatelessWidget {
   const _AuthPosterBackdrop();
 
+  static const String _defaultAsset = 'assets/auth/bg_3.jpg';
+
   @override
   Widget build(BuildContext context) {
-    return Image.asset(
+    final remoteUrl = context.watch<AppConfigController>().loginBackgroundUrl;
+    return RemoteImage(
       key: const Key('auth-poster-backdrop'),
-      'assets/auth/bg_3.jpg',
+      remoteUrl,
       fit: BoxFit.cover,
-      alignment: Alignment.center,
+      fallbackWidget: Image.asset(
+        _defaultAsset,
+        key: const Key('auth-poster-default'),
+        fit: BoxFit.cover,
+        alignment: Alignment.center,
+      ),
     );
   }
 }

lib/pages/mine/about_page.dart

@@ -33,7 +33,7 @@ class MineAboutPage extends StatelessWidget {
           ),
           children: [
             Text(
-              l10n.appName,
+              l10n.aboutBrandName,
               textAlign: TextAlign.center,
               style: const TextStyle(
                 fontFamily: 'Outfit',

test/auth/auth_k21_test.dart

@@ -8,12 +8,14 @@ import 'package:shared_preferences_platform_interface/shared_preferences_async_p
 
 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/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';
 
@@ -71,6 +73,9 @@ Future<void> _pumpAuth(WidgetTester tester) async {
     MultiProvider(
       providers: [
         ChangeNotifierProvider<AuthController>.value(value: auth),
+        ChangeNotifierProvider<AppConfigController>.value(
+          value: await fakeAppConfigController(),
+        ),
         Provider<Haptics>.value(value: FakeHaptics()),
       ],
       child: MaterialApp(

test/auth/auth_landing_test.dart

@@ -8,12 +8,14 @@ import 'package:shared_preferences_platform_interface/shared_preferences_async_p
 
 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/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';
 
@@ -36,6 +38,9 @@ void main() {
       MultiProvider(
         providers: [
           ChangeNotifierProvider<AuthController>.value(value: auth),
+          ChangeNotifierProvider<AppConfigController>.value(
+            value: await fakeAppConfigController(),
+          ),
           Provider<Haptics>.value(value: FakeHaptics()),
         ],
         child: MaterialApp(

test/auth/auth_page_test.dart

@@ -11,12 +11,14 @@ 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/auth_api.dart';
 import 'package:fruitshorts/core/data/remote/api_client.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/l10n/app_localizations.dart';
 import 'package:fruitshorts/pages/auth/auth_view.dart';
 
+import '../support/fake_app_config.dart';
 import '../support/fake_http_adapter.dart';
 import '../support/fake_haptics.dart';
 
@@ -29,17 +31,17 @@ void main() {
     // 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'),
+          const MethodChannel('com.stormg.lumadrama/device'),
-      (call) async => call.method == 'region' ? 'ID' : null,
+          (call) async => call.method == 'region' ? 'ID' : null,
-    );
+        );
   });
 
   tearDown(() {
     TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
         .setMockMethodCallHandler(
-      const MethodChannel('com.stormg.lumadrama/device'),
+          const MethodChannel('com.stormg.lumadrama/device'),
-      null,
+          null,
-    );
+        );
   });
 
   Future<void> pumpAuthPage(
@@ -65,6 +67,9 @@ void main() {
       MultiProvider(
         providers: [
           ChangeNotifierProvider<AuthController>.value(value: auth),
+          ChangeNotifierProvider<AppConfigController>.value(
+            value: await fakeAppConfigController(),
+          ),
           Provider<Haptics>.value(value: haptics ?? FakeHaptics()),
         ],
         child: MaterialApp(
@@ -212,7 +217,7 @@ void main() {
   ) async {
     await pumpAuthPage(tester);
 
-    expect(find.text('FruitShorts'), findsOneWidget);
+    expect(find.text('ymb'), findsNothing);
     expect(find.text('Short dramas made for Indonesia'), findsOneWidget);
     final email = tester.widget<TextField>(find.byKey(const Key('auth-email')));
     final password = tester.widget<TextField>(

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);
+      // 落地页只留图标，不再显示品牌文字。
-      final brand = tester.widget<Text>(find.text('FruitShorts'));
+      expect(find.text('ymb'), findsNothing);
-      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(88, 88),
@@ -136,10 +141,7 @@ void main() {
       final email = tester.widget<TextField>(
         find.byKey(const Key('auth-email')),
       );
-      expect(
+      expect(email.decoration?.fillColor, Colors.white.withValues(alpha: 0.05));
-        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>(
+      final backdrop = tester.widget<RemoteImage>(
-        find.descendant(
+        find.byKey(const Key('auth-poster-backdrop')),
-          of: find.byKey(const Key('auth-brand-logo')),
-          matching: find.byType(Image),
-        ),
       );
+      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,
+        find.byKey(const Key('auth-poster-default')),
-        'assets/icon/fruitshorts.png',
+        findsOneWidget,
-      );
-      // 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_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>(
+            .widget<GestureDetector>(find.byKey(const Key('auth-mode-sign-up')))
-              find.byKey(const Key('auth-mode-sign-up')),
-            )
             .onTap,
         isNull,
       );

test/config/server_endpoint_test.dart

@@ -74,6 +74,7 @@ void main() {
     final prod = Uri.parse(ProdConfig.baseUrl);
 
     expect(dev.scheme, 'http');
+    expect(dev.host, isNot(prod.host));
     expect(dev.port, 8081);
     expect(dev.path, isEmpty);
     expect(prod.scheme, 'http');

test/core/app_config_controller_test.dart

@@ -0,0 +1,53 @@
+// Author: fruit.com.cn
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:fruitshorts/core/data/remote/api_client.dart';
+import 'package:fruitshorts/core/data/remote/config_api.dart';
+import 'package:fruitshorts/core/data/services/app_config_controller.dart';
+
+import '../support/fake_http_adapter.dart';
+
+AppConfigController _controller(FakeHttpAdapter adapter) => AppConfigController(
+  ConfigApi(ApiClient(baseUrl: 'http://127.0.0.1:1', adapter: adapter)),
+);
+
+void main() {
+  test('should_use_backend_url_when_login_background_is_configured', () async {
+    final controller = _controller(
+      FakeHttpAdapter(
+        (_) async => FakeHttpResponse(
+          '{"code":0,"data":{"loginBackgroundUrl":"/files/login_bg/bg.jpg"}}',
+        ),
+      ),
+    );
+
+    await controller.load();
+
+    expect(controller.loginBackgroundUrl, '/files/login_bg/bg.jpg');
+  });
+
+  test('should_treat_blank_value_as_not_configured', () async {
+    final controller = _controller(
+      FakeHttpAdapter(
+        (_) async =>
+            FakeHttpResponse('{"code":0,"data":{"loginBackgroundUrl":"  "}}'),
+      ),
+    );
+
+    await controller.load();
+
+    expect(controller.loginBackgroundUrl, isEmpty);
+  });
+
+  test('should_keep_local_default_when_config_request_fails', () async {
+    var notified = 0;
+    final controller = _controller(
+      FakeHttpAdapter((_) async => FakeHttpResponse('{}', 500)),
+    )..addListener(() => notified++);
+
+    await controller.load();
+
+    expect(controller.loginBackgroundUrl, isEmpty);
+    expect(notified, 0);
+  });
+}

test/support/fake_app_config.dart

@@ -0,0 +1,31 @@
+// Author: fruit.com.cn
+
+import 'package:fruitshorts/core/data/remote/api_client.dart';
+import 'package:fruitshorts/core/data/remote/config_api.dart';
+import 'package:fruitshorts/core/data/services/app_config_controller.dart';
+
+/// 直接 pump 登录页的测试需要 App 配置 Provider。
+///
+/// 只用内存里的结论、不发真实请求：widget 测试的 fake-async 下等待 dio
+/// 的 HTTP 请求会挂住，所以这里换掉 [ConfigApi] 的实现。
+Future<AppConfigController> fakeAppConfigController({
+  String loginBackgroundUrl = '',
+}) async {
+  final controller = AppConfigController(
+    _FakeConfigApi(loginBackgroundUrl),
+  );
+  await controller.load();
+  return controller;
+}
+
+class _FakeConfigApi extends ConfigApi {
+  _FakeConfigApi(this.loginBackgroundUrl)
+    : super(ApiClient(baseUrl: 'http://127.0.0.1:1'));
+
+  final String loginBackgroundUrl;
+
+  @override
+  Future<Map<String, dynamic>> appConfig() async => {
+    'loginBackgroundUrl': loginBackgroundUrl,
+  };
+}

test/widget_test.dart

@@ -138,7 +138,7 @@ void main() {
     await tester.tap(find.byKey(const Key('tab-mine')));
     await tester.pumpAndSettle();
     expect(find.text('Vicky sheng'), findsOneWidget);
-    expect(find.text('FruitShorts VIP'), findsOneWidget);
+    expect(find.text('VIP'), findsOneWidget);
     expect(find.byKey(const Key('mine-language')), findsOneWidget);
     expect(find.byKey(const Key('mine-wallet')), findsOneWidget);
 
@@ -265,7 +265,7 @@ void main() {
     await tester.tap(find.byKey(const Key('player-rail-share')));
     await tester.pumpAndSettle();
     expect(sharedText, contains('City Lights & Velvet Nights'));
-    expect(sharedText, contains('FruitShorts'));
+    expect(sharedText, contains('ymb'));
     expect(tester.takeException(), isNull);
   });