Predict gasthermomachines (#33837)

* Predict gasthermomachines

* despawn

* smellby

Content.Shared/Power/EntitySystems/SharedPowerNetSystem.cs

@@ -1,6 +1,21 @@
+using Content.Shared.Power.Components;
+
 namespace Content.Shared.Power.EntitySystems;
 
 public abstract class SharedPowerNetSystem : EntitySystem
 {
+    [Dependency] private readonly SharedAppearanceSystem _appearance = default!;
 
+    public abstract bool IsPoweredCalculate(SharedApcPowerReceiverComponent comp);
+
+    public override void Initialize()
+    {
+        base.Initialize();
+        SubscribeLocalEvent<AppearanceComponent, PowerChangedEvent>(OnPowerAppearance);
+    }
+
+    private void OnPowerAppearance(Entity<AppearanceComponent> ent, ref PowerChangedEvent args)
+    {
+        _appearance.SetData(ent, PowerDeviceVisuals.Powered, args.Powered, ent.Comp);
+    }
 }