表格编辑框 表单验证有点问题

#### 描述问题：

表格编辑框里面一个下拉框校验 已经选了值 还是不能通过校验

#### 截图或视频：


1. 你是如何使用 amis 的？

```
code here...
```

4. 操作步骤
请简单描述一下复现的操作步骤...

The issue identifies a table editor dropdown whose selected value still fails form validation and includes a screenshot, but it names no source file, test, or usable reproduction. Start by reconstructing the missing AMIS usage and operation steps, then trace the table editor's validation path. Done means the selected dropdown value passes validation in the reported case, with regression coverage where applicable.

Written by the indexing model from the issue text.