BSM Magic Login v1.0.38 — Notification Severity & UX

- Applied the global BSM notification severity standard to login status notices.
- Expired/invalid magic links and rate-limit guidance use amber warnings.
- Blocked sign-in states use red error notices.
- Email-sent and normal first-time passkey enrollment use blue informational notices.
- Added success styling for shared notice components.
- Preserved login/passkey/continue page layout and authentication behavior.
- Added high-contrast mode border fallback.

Validation: PHP lint, JS syntax, ZIP integrity; live WordPress visual and authentication verification pending.
