缺乏草稿功能

[dc-vin]

Describe the bug 描述Bug 填写完表单，点击下一步，发现上一步填错了，点击上一步，上一步页面页面数据被全部清空

To Reproduce 如何复现

Expected behavior 期望的结果

Screenshots 截图

Desktop (please complete the following information): 环境

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Additional context 其他 Add any other context about the problem here.