feat(flutter): 去掉剧场封面角标并重做创作页

lib/l10n/app_localizations_en.dart

@@ -317,6 +317,12 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get createUploadSubtitle => 'Publish a finished short drama';
 
+  @override
+  String get createMottoPrimary => 'Your imagination';
+
+  @override
+  String get createMottoSecondary => 'Can be seen by more people';
+
   @override
   String get weekdayMon => 'Mon';