logoutFromProfile failed hard when the management server returned NotFound
(peer already deleted from the dashboard), blocking both profile logout and
profile removal. Treat NotFound as success — the peer is already gone, so
deregistering it is already satisfied.
Also drop the user-side per-profile state file on logout. The account email is
sourced from <profile>.state.json (written by the CLI after SSO login), which
the root daemon can't reach, so logout left a stale email showing in the UI.
Connection.Logout now removes it from the UI process after a successful logout;
the next SSO login recreates it.
Zoltán Papp