Fix tenant event form package selector so it no longer renders empty-value options, handles loading/empty

states, and pulls data from the authenticated /api/v1/tenant/packages endpoint.
    (resources/js/admin/pages/EventFormPage.tsx, resources/js/admin/api.ts)
  - Harden tenant-admin auth flow: prevent PKCE state loss, scope out StrictMode double-processing, add SPA
    routes for /event-admin/login and /event-admin/logout, and tighten token/session clearing semantics (resources/js/admin/auth/{context,tokens}.tsx, resources/js/admin/pages/{AuthCallbackPage,LogoutPage}.tsx,
    resources/js/admin/router.tsx, routes/web.php)

resources/js/guest/i18n/messages.ts

@@ -59,6 +59,16 @@ export const messages: Record<LocaleCode, NestedMessages> = {
           description: 'Es gab zu viele Eingaben in kurzer Zeit. Warte kurz und versuche es erneut.',
           hint: 'Tipp: Eine erneute Eingabe ist in wenigen Minuten moeglich.',
         },
+        access_rate_limited: {
+          title: 'Zu viele Aufrufe',
+          description: 'Es gab sehr viele Aufrufe in kurzer Zeit. Warte kurz und versuche es erneut.',
+          hint: 'Tipp: Du kannst es gleich noch einmal versuchen.',
+        },
+        gallery_expired: {
+          title: 'Galerie nicht mehr verfuegbar',
+          description: 'Die Galerie zu diesem Event ist nicht mehr zugaenglich.',
+          ctaLabel: 'Neuen Code anfordern',
+        },
         event_not_public: {
           title: 'Event nicht oeffentlich',
           description: 'Dieses Event ist aktuell nicht oeffentlich zugaenglich.',
@@ -404,6 +414,16 @@ export const messages: Record<LocaleCode, NestedMessages> = {
           description: 'There were too many attempts in a short time. Wait a bit and try again.',
           hint: 'Tip: You can retry in a few minutes.',
         },
+        access_rate_limited: {
+          title: 'Too many requests',
+          description: 'There were too many requests in a short time. Please wait a moment and try again.',
+          hint: 'Tip: You can retry shortly.',
+        },
+        gallery_expired: {
+          title: 'Gallery unavailable',
+          description: 'The gallery for this event is no longer accessible.',
+          ctaLabel: 'Request new code',
+        },
         event_not_public: {
           title: 'Event not public',
           description: 'This event is not publicly accessible right now.',