The sliding problem of Copilot CLI

### Describe the bug

When I use Copilot CLI in Idea, I find that the output content slides up and down very unfriendly, and the content in the input box also slides along. In addition, after sliding to the bottom of the latest output content, there will be automatic online sliding, and I can never understand the bottom content.

### Affected version

GitHub Copilot CLI 1.0.18

### Steps to reproduce the behavior

_No response_

### Expected behavior

_No response_

### Additional context

_No response_

Start by reproducing the scrolling behavior described in GitHub Copilot CLI 1.0.18 while using Copilot CLI in Idea. Observe the output and input box while scrolling, including the automatic movement at the latest output; done means both remain readable and the view no longer scrolls unexpectedly.

由索引模型根据 Issue 内容生成。