Fix stale social media preview: revalidate next-event fetch, reject past featured events

Made-with: Cursor

backend/src/routes/site-settings.ts

@@ -200,8 +200,15 @@ siteSettingsRouter.put('/featured-event', requireAuth(['admin']), zValidator('js
     if (event.status !== 'published') {
       return c.json({ error: 'Event must be published to be featured' }, 400);
     }
+    const eventEndTime = event.endDatetime || event.startDatetime;
+    if (new Date(eventEndTime).getTime() <= Date.now()) {
+      return c.json(
+        { error: 'Cannot feature an event that has already ended' },
+        400
+      );
+    }
   }
-  
+
   // Get or create settings
   const existing = await dbGet<any>(
     (db as any).select().from(siteSettings).limit(1)