/// 分类项（V2 字段：federation=id, brigade=name, greylist=icon）
class CategoryItem {
  const CategoryItem({
    required this.id,
    required this.name,
    this.icon,
  });

  final int id;
  final String name;
  final String? icon;

  factory CategoryItem.fromJson(Map<String, dynamic> json) {
    return CategoryItem(
      id: json['federation'] as int? ?? 0,
      name: json['brigade'] as String? ?? '',
      icon: json['greylist'] as String?,
    );
  }
}