@sirmapy 4- Intent + deep-link – Create the request in Peniwallet, deep-link to Pi Browser only for the final signature, then update our ledger via callback.
I think that any of these keep us closer to the single-seed experience than a full separate app or a bolted-on Pi mode.
@sirmapy 3- Isolated passphrase vault – One-time import of the user’s Pi passphrase into a completely separate encrypted vault, with a clear path to migrate later to pure seed derivation.