Content update for UI prediction (#27214)

* Content update for UI refactor

* Big update

* Sharing

* Remaining content updates

* First big update

* Prototype updates

* AUGH

* Fix UI comp ref

* Cleanup

- Fix predicted message, fix item slots, fix interaction range check.

* Fix regressions

* Make this predictive

idk why it wasn't.

* Fix slime merge

* Merge conflict

* Fix merge

Content.Server/Gateway/Systems/GatewaySystem.cs

@@ -129,7 +129,7 @@ public sealed class GatewaySystem : EntitySystem
             unlockTime
         );
 
-        _ui.TrySetUiState(uid, GatewayUiKey.Key, state);
+        _ui.SetUiState(uid, GatewayUiKey.Key, state);
     }
 
     private void UpdateAppearance(EntityUid uid)
@@ -139,12 +139,14 @@ public sealed class GatewaySystem : EntitySystem
 
     private void OnOpenPortal(EntityUid uid, GatewayComponent comp, GatewayOpenPortalMessage args)
     {
-        if (args.Session.AttachedEntity == null || GetNetEntity(uid) == args.Destination ||
+        if (GetNetEntity(uid) == args.Destination ||
             !comp.Enabled || !comp.Interactable)
+        {
             return;
+        }
 
         // if the gateway has an access reader check it before allowing opening
-        var user = args.Session.AttachedEntity.Value;
+        var user = args.Actor;
         if (CheckAccess(user, uid, comp))
             return;