应用: 拼多多
任务: 打开拼多多，搜索“空气净化器”，选择第一个商品，拼单购买
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: TYPE
type_text: 空气净化器
step_id: 3
action: CLICK
step_id: 4
action: CLICK
step_id: 5
action: CLICK
step_id: 6
action: CLICK