BackupAvailable

No local sigil yet, but a Block Store cloud backup was found.

The probe is biometric-free — it only fetches the encrypted blob's existence, not its contents. The user is presented with a choice between restoring the previous identity (PRF biometric on tap) and starting fresh (forge a new sigil on tap). Until they choose, wallet auto-bootstrap on the sibling panel is paused — fresh wallets created uninvited under a forgotten backup would be confusing UX.