Integrate LiveKit SFU and harden booking workflow

app/(frontend)/termine/[slug]/beitreten/page.tsx

@@ -5,6 +5,7 @@ import { JoinForm } from "@/components/meeting/JoinForm";
 import { OrganicBlob } from "@/components/OrganicBlob";
 import { getEventForJoin } from "@/lib/payload/content";
 import { combineDateAndTime } from "@/lib/meeting/status";
+import { formatBerlinDate, formatBerlinTime } from "@/lib/calendar/timezone";
 
 export const dynamic = "force-dynamic";
 
@@ -21,8 +22,8 @@ export default async function BeitretenPage({ params }: Args) {
   if (!event || !event.isOnline) notFound();
 
   const start = combineDateAndTime(event.date, event.startTime);
-  const dateLabel = start.toLocaleDateString("de-DE", { day: "2-digit", month: "long" });
-  const timeLabel = start.toLocaleTimeString("de-DE", { hour: "2-digit", minute: "2-digit" });
+  const dateLabel = formatBerlinDate(start, { day: "2-digit", month: "long" });
+  const timeLabel = formatBerlinTime(start, { hour: "2-digit", minute: "2-digit" });
 
   return (
     <section className="relative flex min-h-[80vh] items-center overflow-hidden py-20">

app/(frontend)/termine/[slug]/page.tsx

@@ -76,7 +76,7 @@ export default async function EventDetailPage({ params }: Args) {
     const { user } = await payload.auth({ headers: await headers() });
     // Must check the collection, not just presence — a logged-in customer
     // (collection "customers") must never be treated as host.
-    const isHost = user?.collection === "users";
+    const isHost = user?.collection === "users" && user.role === "admin";
     const settings = await payload.findGlobal({ slug: "meeting-settings" });
     const start = combineDateAndTime(event.date, event.startTime);
     const end = event.endTime

app/(frontend)/termine/page.tsx

@@ -21,7 +21,9 @@ export default async function TerminePage() {
   const events = await getAllEvents();
   const today = new Date();
   today.setHours(0, 0, 0, 0);
-  const upcoming = events.filter((e) => new Date(e.date) >= today).reverse();
+  const upcoming = events
+    .filter((e) => new Date(e.date) >= today)
+    .sort((a, b) => new Date(a.date).getTime() - new Date(b.date).getTime());
   const past = events.filter((e) => new Date(e.date) < today);
   const siteUrl = await getSiteUrl();