Update session status logic to show upcoming sessions per room

Modifies the `findNextSessions` function in `client/src/pages/Kiosk.tsx` to determine "Aankomend" sessions on a per-room basis, rather than globally.

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Author: marcselman

client/src/pages/Kiosk.tsx

@@ -124,19 +124,19 @@ function getSessionStatus(session: KioskSession, now: Date): SessionStatus {
 }
 
 function findNextSessions(sessions: KioskSession[], now: Date): Set<string> {
-  const futureSessions = sessions
-    .filter(s => new Date(s.startTime) > now)
-    .sort((a, b) => new Date(a.startTime).getTime() - new Date(b.startTime).getTime());
+  const rooms = [...new Set(sessions.map(s => s.room))];
+  const nextIds = new Set<string>();
 
-  if (futureSessions.length === 0) return new Set();
+  for (const room of rooms) {
+    const futureSessions = sessions
+      .filter(s => s.room === room && new Date(s.startTime) > now)
+      .sort((a, b) => new Date(a.startTime).getTime() - new Date(b.startTime).getTime());
 
-  const earliestStart = new Date(futureSessions[0].startTime).getTime();
-  const nextIds = new Set<string>();
-  for (const s of futureSessions) {
-    if (new Date(s.startTime).getTime() === earliestStart) {
-      nextIds.add(s.id);
+    if (futureSessions.length > 0) {
+      nextIds.add(futureSessions[0].id);
     }
   }
+
   return nextIds;
 }