Skip expired Meows in live display and playlist API

Controllers/DisplayController.cs

@@ -26,6 +26,12 @@ public class DisplayController : Controller
             return View("NotFound", devices);
         }
 
+        // Skip expired Meows — expiry is enforced at playback time, not on the stored data
+        var now = DateTime.Now;
+        device.DeviceSlides = device.DeviceSlides
+            .Where(ds => ds.Slide.ExpiresAt == null || ds.Slide.ExpiresAt > now)
+            .ToList();
+
         return View(device);
     }
 
@@ -40,7 +46,10 @@ public class DisplayController : Controller
 
         if (device == null) return NotFound();
 
-        var playlist = device.DeviceSlides.Select(ds => new
+        var now = DateTime.Now;
+        var playlist = device.DeviceSlides
+            .Where(ds => ds.Slide.ExpiresAt == null || ds.Slide.ExpiresAt > now)
+            .Select(ds => new
         {
             id = ds.Slide.Id,
             name = ds.Slide.Name,