"No files in workspace yet." when `/session files`

### Describe the bug

I ran the session for a while and CLI agent has created many files in the session folder. But when using `/session files` to attempt to review the created files, it shows "No files in workspace yet."

### Affected version

v0.0.407

### Steps to reproduce the behavior

1. Run CLI and have files created in ~/.copilot/session-state/{id} folder
2. Run `/session files`
3. See `● No files in workspace yet.`

### Expected behavior

_No response_

### Additional context

_No response_