Drops out of autopilot after each request

### Describe the bug

It used to be that I would go into autopilot at the beginning (by pressing Shift + Tab twice). Then I would give it a prompt and it would stay in autopilot. I knew this because of the color, the autopilot color was Green (now it's Purple) The color change is fine, but the issue is after a prompt of it being Purple then after the prompt is done it goes back to being Grey. I hit shift tab twice again to put it back into Purple, and then when the prompt is done it goes back to Grey again. Its unclear if its still in autopilot mode. Is it ? Why does it keep going back to Grey after each prompt ? Makes it very hard to tell if i'm still in Autopilot mode. Not sure if this was a bug or a design choice but it makes it very confusing what mode im in.

Thanks

### Affected version

_No response_

### Steps to reproduce the behavior

_No response_

### Expected behavior

_No response_

### Additional context

_No response_

首先在 Copilot CLI 中复现这一情况：按两次 Shift+Tab 进入 autopilot，提交一个提示，然后观察模式和颜色之后是否发生变化。没有指定文件、测试或受影响的版本；当 autopilot 状态明确，并且在每次请求后都与显示的指示器保持一致时，即表示完成。

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