field :feishu, type: :hash, display: true, restart_required: true, default: {
      enabled: ActiveModel::Type::Boolean.new.cast(ENV['FEISHU_ENABLED'] || false),
      app_id: ENV['FEISHU_APP_ID'],
      app_secret: ENV['FEISHU_APP_SECRET'],
    }, validates: { json: { format: :hash } }