feat(auth): 登录页改为 ymb 品牌并支持后台配置背景图

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。';