[UIPKGE] Two-step verification surface. 6-digit OTP pin input auto-submits on entry, shows verifying state and an inline error on mismatch, has a 30-second resend cooldown, and swaps to a Verified card with a Continue button on success. Emits `verify` (code), `resend`, and `continue`. `demoCode` prop control
pnpm dlx shadcn@latest add "https://registry.directory/r/uday-a/auth-mfa.json"