feat(auth): 登录页改为 ymb 品牌并支持后台配置背景图

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 =
-            fit == BoxFit.cover || fit == BoxFit.contain;
-        final cacheHeight = decodeHeight ??
+        final keepsAspectRatio = fit == BoxFit.cover || fit == BoxFit.contain;
+        final cacheHeight =
+            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",
-  "shareFooter": "FruitShorts",
+  "brandMark": "YMB",
+  "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",
-  "shareFooter": "FruitShorts",
+  "brandMark": "YMB",
+  "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",
-  "shareFooter": "FruitShorts",
+  "brandMark": "YMB",
+  "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(
-    crossAxisAlignment: centered
-        ? CrossAxisAlignment.center
-        : CrossAxisAlignment.start,
-    children: [
-      Text(
-        AppLocalizations.of(context)!.appName,
-        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,
-        ),
-      ),
-    ],
+  Widget _brandCopy({required bool centered}) => 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(
-              child: IgnorePointer(child: _AuthPosterBackdrop()),
-            ),
+            Positioned.fill(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>(
-        key: const Key('auth-enter-animation'),
-        tween: Tween(begin: 0, end: 1),
-        duration: _enterDuration,
-        curve: Curves.easeOutCubic,
-        builder: (context, value, child) => Opacity(
-          opacity: value,
-          child: Transform.translate(
-            offset: Offset(0, _enterSlideDistance * (1 - value)),
-            child: child,
-          ),
-        ),
-        child: _emailEntryOpen
-            ? Column(
-                crossAxisAlignment: CrossAxisAlignment.stretch,
-                children: [
-                  _AuthBrand(tagline: l10n.authBrandTagline, compact: compact),
-                  SizedBox(height: compact ? _compactBrandGap : 28),
-                  _authCard(l10n),
-                ],
-              )
-            : _landing(l10n, minHeight: minHeight),
-      );
+  }) => TweenAnimationBuilder<double>(
+    key: const Key('auth-enter-animation'),
+    tween: Tween(begin: 0, end: 1),
+    duration: _enterDuration,
+    curve: Curves.easeOutCubic,
+    builder: (context, value, child) => Opacity(
+      opacity: value,
+      child: Transform.translate(
+        offset: Offset(0, _enterSlideDistance * (1 - value)),
+        child: child,
+      ),
+    ),
+    child: _emailEntryOpen
+        ? Column(
+            crossAxisAlignment: CrossAxisAlignment.stretch,
+            children: [
+              _AuthBrand(tagline: l10n.authBrandTagline, compact: compact),
+              SizedBox(height: compact ? _compactBrandGap : 28),
+              _authCard(l10n),
+            ],
+          )
+        : _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'),
-    crossAxisAlignment: CrossAxisAlignment.stretch,
-    children: [
-      const Spacer(flex: 5),
-      Center(
-        child: _brandMarkWidget(
-          key: const Key('auth-brand-logo'),
-          size: _brandMarkSize,
-          radius: _brandMarkRadius,
+          key: const Key('auth-landing'),
+          crossAxisAlignment: CrossAxisAlignment.stretch,
+          children: [
+            const Spacer(flex: 5),
+            Center(
+              child: _brandMarkWidget(
+                key: const Key('auth-brand-logo'),
+                size: _brandMarkSize,
+                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',