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

Comienza reproduciendo el retraso mediante el flujo de reanudación de sesiones del panel izquierdo después de reiniciar la CLI, usando varias sesiones tal como se describe. Sigue la ruta de reanudación y observa cuándo falta la indicación de carga; la tarea estará terminada cuando las sesiones reanudadas ya no parezcan dejar de responder y el estado de carga se pueda distinguir de una CLI averiada.