Completes fluent switching across signing methods (NIP-07 / nsec / NIP-46):
- NIP-46 switching: it had the same bug — switchProfile called the provider with no
reuseStored, so it started a fresh handshake (needs a new connect URI/QR) instead of
reconnecting. Now handleProfileSwitchRequest sends { providerId: "nip46",
reuseStored: true } for NIP-46 targets; authService.switchProfile forwards reuseStored;
the nip46 provider's useStoredRemoteSigner reconnects the stored session and activates
the account. On failure -> a clear "reconnect your remote signer" toast.
- Wrong-account guard (all methods): requestLogin now enforces expectPubkey (only set by
switchProfile). A single-slot stored nsec/NIP-46 session resolving to a DIFFERENT
account than requested is rejected with `pubkey-mismatch` instead of silently switching
to the wrong profile. Also protects NIP-07 (switching to an account the extension isn't
currently on fails clearly instead of grabbing the extension's active account).
Tests: tests/authService.test.mjs (+3 — unlockStored/passphrase + reuseStored forwarding,
expectPubkey rejection). Build + lint clean; auth suites green.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
