应用: 拼多多
任务: 打开拼多多，搜索“华为Mate 40”，选择第五条商品，点击拼单购买按钮
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: TYPE
type_text: 华为Mate 40
step_id: 3
action: CLICK
step_id: 4
action: CLICK