Drops all biometric (Termius-style), WebAuthn, and FIDO2 SSH key logic, UI, and dependencies.
Simplifies key storage and authentication to only support standard and certificate keys.
Eliminates related backend, OS Secure Storage, and Windows Hello/Touch ID code.
Archives any legacy key records for migration safety.
Reduces complexity and potential maintenance/security burden.
Replaces legacy GitHub Gist sync UI with a modular cloud sync component and introduces OAuth callback support in the bridge layer. Updates the top bar to use a sync status button linked to settings, improving user experience and future extensibility for cloud sync providers.