- Move NIP-07 extension login logic from `js/services/authProviders/nip07.js` to `NostrClient.loginWithExtension`.
- Add `validator` support to `NostrClient` login methods (`loginWithExtension`, `connectRemoteSigner`, `useStoredRemoteSigner`, `registerPrivateKeySigner`) to allow pre-session security checks.
- Update `nip07.js`, `nip46.js`, and `nsec.js` providers to inject `accessControl` checks via the new validator hook, ensuring consistent enforcement of whitelists/blacklists before activating the signer.
- This creates a unified "harness" for all signing methods within `NostrClient` while keeping business logic (access control) in the service layer.
Co-authored-by: PR0M3TH3AN <[email protected]>
