cannot copy (/copy) to clipboard

### Describe the bug

Cannot copy to clipboard via `/copy` slash command

gets error:
`Failed to copy to clipboard: Error: Failed to set text: Failed to write clipboard content: A required Wayland protocol (ext-data-control, or wlr-data-control version 1) is not supported by the compositor`

- Operating System: Windows OS (though am running through WSL Ubuntu)
- Terminal emulator: WezTerm
- Shell: zsh

### Affected version

1.0.66

### Steps to reproduce the behavior

1. Open copilot cli, send simply message
2. attempt to `/copy` last assistant message, gets error (Failed to copy to clipboard: Error: Failed to set text: Failed to write clipboard content: A required Wayland protocol (ext-data-control, or wlr-data-control version 1) is not supported by the compositor)

### Expected behavior

copy command should work successfully on all various platform surfaces
(tested in Windows OS normal Powershell7 terminal, and works there on same machine)

### Additional context

- Operating System: Windows OS (though am running through WSL Ubuntu)
- Terminal emulator: WezTerm
- Shell: zsh

首先定位 `/copy` 斜杠命令的入口点和剪贴板集成，然后在使用 WezTerm 和 zsh 的 WSL Ubuntu 中重现该故障。将其与正常工作的 Windows PowerShell 情况进行比较，并验证复制最后一条 assistant 消息时不会出现 Wayland 协议错误且能够成功完成。

由索引模型根据 Issue 内容生成。