After copying Chinese, Japanese, or Korean from the terminal, pasting the content into the terminal may result in garbled text.

### Describe the bug

When I copy Chinese, Japanese, or Korean from the terminal, there is a chance that pasting the content directly into the terminal will result in garbled text.

The scope of this bug includes both the model's own responses and the content in the input box.

Copying Chinese character/Kanji from the input box and then pasting it almost 100% results in garbled text.

Pasting the text outside the terminal does not cause any issues, and text copied from outside the terminal almost never encounters this problem.

see this video:

https://github.com/user-attachments/assets/3b5c97d3-2511-468a-b3a5-99ccb68f61c7

### Affected version

GitHub Copilot CLI 1.0.48.

### Steps to reproduce the behavior

1. select some CJK text from terminal, then right-click to copy
2. Paste it by right-click
3. There is high a chance that pasting the content will result in garbled text

### Expected behavior

All text appeared in it's origin content

### Additional context

I'm using Windows Terminal 1.24.11321.0, OS Locale is Simplified Chinese.

報告中沒有指定檔案、測試或進入點。在 Windows Terminal 上的 GitHub Copilot CLI 1.0.48 中，分別使用從模型回應和輸入框複製的中文、日文或韓文來重現此問題，然後追蹤終端機的複製／貼上處理流程；當文字往返傳輸且不出現亂碼時，即視為完成。

由索引模型根據 Issue 內容生成。