Resuming a session is extremely slow, does not display UI that would indicate loading

Describe the bug

When I have several sessions in the left pane, even on the same device after restarting the CLI, resuming the session from the left pane is unbearably slow and has no loading UI. This is aggravating to use when I cannot tell if loading the session just isn't going to work at all or if it's slow. I've had it take up to a minute before.

Affected version

GitHub Copilot CLI 1.0.82

Steps to reproduce the behavior

1. Have multiple sessions present in the left pane
2. Restart CLI
3. Try to resume session, then try to resume another one
4. Notice severe delays between each of them being opened with 0 loading UI

Expected behavior

Expected sessions with fresh data to load quickly and with UX that distinguishes loading from a broken CLI

Additional context

No response

首先，在重启 CLI 后，按照描述使用多个会话，通过左侧窗格的会话恢复流程重现延迟。跟踪恢复路径，并观察何时缺少加载反馈；当恢复的会话不再显示为无响应，并且能够将加载状态与 CLI 损坏区分开来时，即表示完成。