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/admin/onboarding/pages/WelcomeOrderSummaryPage.tsx

@@ -35,7 +35,6 @@ import {
 
 const stripePublishableKey = import.meta.env.VITE_STRIPE_PUBLISHABLE_KEY ?? "";
 const paypalClientId = import.meta.env.VITE_PAYPAL_CLIENT_ID ?? "";
-const stripePromise = stripePublishableKey ? loadStripe(stripePublishableKey) : null;
 
 type StripeCheckoutProps = {
   clientSecret: string;
@@ -268,6 +267,10 @@ export default function WelcomeOrderSummaryPage() {
   const { t, i18n } = useTranslation("onboarding");
   const locale = i18n.language?.startsWith("en") ? "en-GB" : "de-DE";
   const { currencyFormatter, dateFormatter } = useLocaleFormats(locale);
+  const stripePromise = React.useMemo(
+    () => (stripePublishableKey ? loadStripe(stripePublishableKey) : null),
+    [stripePublishableKey]
+  );
 
   const packageIdFromState = typeof location.state === "object" ? (location.state as any)?.packageId : undefined;
   const selectedPackageId = progress.selectedPackage?.id ?? packageIdFromState ?? null;
@@ -335,7 +338,7 @@ export default function WelcomeOrderSummaryPage() {
     return () => {
       cancelled = true;
     };
-  }, [requiresPayment, packageDetails, t]);
+  }, [requiresPayment, packageDetails, stripePromise, t]);
 
   const priceText =
     progress.selectedPackage?.priceText ??