Sloth's subfloor vismask adventure (#35347)

* Add a subfloor vismask

Significantly cuts down on sent entity count.

* More optimisations

* Fix command

* Fixes

* namespace cleanup

* Review

* Vismasks

* Content update

* Bandaid

* awewa

* Revert these

* reh

* Update Content.Shared/SubFloor/TrayScannerComponent.cs

---------

Co-authored-by: slarticodefast <161409025+slarticodefast@users.noreply.github.com>

Content.Client/SubFloor/SubFloorHideSystem.cs

@@ -1,12 +1,15 @@
-using Content.Shared.DrawDepth;
+using Content.Client.UserInterface.Systems.Sandbox;
 using Content.Shared.SubFloor;
 using Robust.Client.GameObjects;
+using Robust.Client.UserInterface;
+using Robust.Shared.Player;
 
 namespace Content.Client.SubFloor;
 
 public sealed class SubFloorHideSystem : SharedSubFloorHideSystem
 {
     [Dependency] private readonly SharedAppearanceSystem _appearance = default!;
+    [Dependency] private readonly IUserInterfaceManager _ui = default!;
 
     private bool _showAll;
 
@@ -18,8 +21,13 @@ public sealed class SubFloorHideSystem : SharedSubFloorHideSystem
         {
             if (_showAll == value) return;
             _showAll = value;
+            _ui.GetUIController<SandboxUIController>().SetToggleSubfloors(value);
 
-            UpdateAll();
+            var ev = new ShowSubfloorRequestEvent()
+            {
+                Value = value,
+            };
+            RaiseNetworkEvent(ev);
         }
     }
 
@@ -28,6 +36,20 @@ public sealed class SubFloorHideSystem : SharedSubFloorHideSystem
         base.Initialize();
 
         SubscribeLocalEvent<SubFloorHideComponent, AppearanceChangeEvent>(OnAppearanceChanged);
+        SubscribeNetworkEvent<ShowSubfloorRequestEvent>(OnRequestReceived);
+        SubscribeLocalEvent<LocalPlayerDetachedEvent>(OnPlayerDetached);
+    }
+
+    private void OnPlayerDetached(LocalPlayerDetachedEvent ev)
+    {
+        // Vismask resets so need to reset this.
+        ShowAll = false;
+    }
+
+    private void OnRequestReceived(ShowSubfloorRequestEvent ev)
+    {
+        // When client receives request Queue an update on all vis.
+        UpdateAll();
     }
 
     private void OnAppearanceChanged(EntityUid uid, SubFloorHideComponent component, ref AppearanceChangeEvent args)