🐛 Fix failed to push when no push subscription

DysonNetwork.Sphere/Account/NotificationService.cs

@@ -184,8 +184,8 @@ public class NotificationService(
         {
             int platformCode = value.Key switch
             {
-                NotificationPushProvider.Google => 1,
+                NotificationPushProvider.Apple => 1,
-                NotificationPushProvider.Apple => 2,
+                NotificationPushProvider.Google => 2,
                 _ => throw new InvalidOperationException($"Unknown push provider: {value.Key}")
             };
 
@@ -248,9 +248,12 @@ public class NotificationService(
     private async Task _PushNotification(Notification notification,
         IEnumerable<NotificationPushSubscription> subscriptions)
     {
+        var subList = subscriptions.ToList();
+        if (subList.Count == 0) return;
+        
         var requestDict = new Dictionary<string, object>
         {
-            ["notifications"] = _BuildNotificationPayload(notification, subscriptions)
+            ["notifications"] = _BuildNotificationPayload(notification, subList)
         };
 
         var client = httpFactory.CreateClient();