feat: Background download on iOS (#1442)

ui/flutter/lib/api/model/downloader_config.dart

@@ -113,6 +113,7 @@ class ExtraConfig {
   bool notifyWhenNewVersion;
   bool autoStartTasks;
   bool desktopNotification;
+  bool backgroundLocationKeepAlive;
   List<DownloadCategory> downloadCategories;
 
   ExtraConfigBt bt = ExtraConfigBt();
@@ -127,6 +128,7 @@ class ExtraConfig {
     this.notifyWhenNewVersion = true,
     this.autoStartTasks = false,
     this.desktopNotification = true,
+    this.backgroundLocationKeepAlive = false,
     this.downloadCategories = const [],
   });
 

ui/flutter/lib/api/model/downloader_config.g.dart

@@ -111,6 +111,8 @@ ExtraConfig _$ExtraConfigFromJson(Map<String, dynamic> json) => ExtraConfig(
       notifyWhenNewVersion: json['notifyWhenNewVersion'] as bool? ?? true,
       autoStartTasks: json['autoStartTasks'] as bool? ?? false,
       desktopNotification: json['desktopNotification'] as bool? ?? true,
+      backgroundLocationKeepAlive:
+          json['backgroundLocationKeepAlive'] as bool? ?? false,
       downloadCategories: (json['downloadCategories'] as List<dynamic>?)
               ?.map((e) => DownloadCategory.fromJson(e as Map<String, dynamic>))
               .toList() ??
@@ -130,6 +132,7 @@ Map<String, dynamic> _$ExtraConfigToJson(ExtraConfig instance) =>
       'notifyWhenNewVersion': instance.notifyWhenNewVersion,
       'autoStartTasks': instance.autoStartTasks,
       'desktopNotification': instance.desktopNotification,
+      'backgroundLocationKeepAlive': instance.backgroundLocationKeepAlive,
       'downloadCategories':
           instance.downloadCategories.map((e) => e.toJson()).toList(),
       'bt': instance.bt.toJson(),