/// extConfig.items 单项，来自 common_info surge 解析，见 docs/extConfig.md
class ExtConfigItem {
  const ExtConfigItem({
    required this.image,
    required this.cost,
    required this.title,
    required this.detail,
  });

  final String image;
  final int cost;
  final String title;
  final String detail;

  factory ExtConfigItem.fromJson(Map<String, dynamic> json) {
    return ExtConfigItem(
      image: json['image'] as String? ?? '',
      cost: (json['cost'] is int)
          ? json['cost'] as int
          : (json['cost'] is num)
              ? (json['cost'] as num).toInt()
              : 0,
      title: json['title'] as String? ?? '',
      detail: json['detail'] as String? ?? '',
    );
  }
}