[Desktop] Cannot delete/remove project entries from sidebar

Feature Request: Allow users to delete/remove project entries from sidebar

Problem

In the Codex Desktop app, the sidebar shows project entries. When a project folder no longer exists on disk (e.g., it was deleted or moved), the entry remains in the sidebar with no way to remove it. The only available option is "Archive", but there is no "Delete" or "Remove" action.

Expected Behavior

Users should be able to permanently remove/delete a project entry from the sidebar, especially when:

1. The underlying folder no longer exists (stale/orphaned entries)
2. The user no longer needs the project and wants to clean up the list

Current Workaround

Archiving the entry hides it from the active list, but the data remains and cannot be permanently removed.

Additional Context

• The project entry path cannot be found anywhere in .codex/config.toml, AppData, or the sqlite databases, suggesting it is stored in internal app state that users cannot edit.
• This makes it impossible for users to clean up orphaned entries even manually.