Authentication & recovery

Rebuild Racecamp's authentication as the split-screen variant — sign-in plus
forgot-password, sent confirmation, and email verification in one page family.
Non-leaking responses, expiring tokens, safe return-to. Nitro Kit, dummy content.

Our sign-in is due for an upgrade. Rebuild authentication for Racecamp, a project
management app from 27 Seagulls, as the split-screen variant from the Nitro Kit Pro
authentication pattern.

Two-column sign-in: the form on one side, and on the other a tall brand panel with our
wordmark, a benefit headline, and a muted product shot. Carry the same split-screen family
through the whole auth flow — forgot password, the sent confirmation, and email
verification — so recovery feels like one page family.

Keep the pattern's semantics honest: never reveal whether an email exists (known and
unknown addresses get the same response), single-purpose expiring tokens, same-origin
return-to. This is a UI showcase: dummy content is fine, no real mail, no database. Use
Nitro Kit components throughout.