- Implement AES-GCM encryption for NIP-46 `clientPrivateKey` and `secret` using `js/nostr/sessionActor.js` primitives.
- Update `writeStoredNip46Session` to accept an optional `passphrase` and encrypt sensitive fields before storage.
- Update `readStoredNip46Session` to support encrypted session retrieval.
- Add `decryptNip46Session` helper to unlock session keys with a user-provided passphrase.
- Update `NostrClient` methods `connectRemoteSigner` and `useStoredRemoteSigner` to support the new encryption flow.
- Ensure plain text keys are never persisted to `localStorage` (default safe behavior maintained).
Signed-off-by: Jules <[email protected]>
Co-authored-by: PR0M3TH3AN <[email protected]>