feat(web): set test open date

apps/web/src/lib/opening.ts

@@ -2,4 +2,4 @@
  * Single source-of-truth for when registration opens.
  * Change this date to reschedule — all gating logic imports from here.
  */
-export const REGISTRATION_OPENS_AT = new Date("2026-03-16T19:00:00+01:00");
+export const REGISTRATION_OPENS_AT = new Date("2026-03-11T10:30:00+01:00");

apps/web/src/routes/login.tsx

@@ -329,9 +329,14 @@ function LoginPage() {
 										onClick={() => setIsSignup(true)}
 										className="cursor-not-allowed text-sm text-white/30"
 										disabled
-										title="Registratie opent op 16 maart om 19:00"
+										title={`Registratie opent op ${REGISTRATION_OPENS_AT.toLocaleString("nl-BE", { day: "numeric", month: "long", hour: "2-digit", minute: "2-digit" })}`}
 									>
-										Nog geen account? (opent 16 maart)
+										Nog geen account? (opent{" "}
+										{REGISTRATION_OPENS_AT.toLocaleString("nl-BE", {
+											day: "numeric",
+											month: "long",
+										})}
+										)
 									</button>
 								)}
 								<Link to="/" className="text-sm text-white/60 hover:text-white">