Revert "fixes a bunch of warnings"

This reverts commit d4d85b663f.

Content.Client/AI/ClientPathfindingDebugSystem.cs

@@ -18,6 +18,7 @@ namespace Content.Client.AI
 #if DEBUG
     public class ClientPathfindingDebugSystem : EntitySystem
     {
+        [Dependency] private readonly IOverlayManager _overlayManager = default!;
         [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
         [Dependency] private readonly IEyeManager _eyeManager = default!;
         [Dependency] private readonly IPlayerManager _playerManager = default!;

Content.Client/Body/UI/BodyScannerBoundUserInterface.cs

@@ -14,6 +14,9 @@ namespace Content.Client.Body.UI
         [ViewVariables]
         private BodyScannerDisplay? _display;
 
+        [ViewVariables]
+        private EntityUid _entity;
+
         public BodyScannerBoundUserInterface(ClientUserInterfaceComponent owner, object uiKey) : base(owner, uiKey) { }
 
         protected override void Open()
@@ -40,7 +43,7 @@ namespace Content.Client.Body.UI
                 throw new ArgumentException($"Received an invalid entity with id {scannerState.Uid} for body scanner with id {Owner.Owner} at {entMan.GetComponent<TransformComponent>(Owner.Owner).MapPosition}");
             }
 
-            _display?.UpdateDisplay(scannerState.Uid);
+            _display?.UpdateDisplay(_entity);
         }
 
         protected override void Dispose(bool disposing)

Content.Client/Body/UI/BodyScannerDisplay.cs

@@ -104,7 +104,7 @@ namespace Content.Client.Body.UI
 
         public void UpdateDisplay(EntityUid entity)
         {
-            if(!entity.Valid)
+            if(entity == null)
                 return;
 
             _currentEntity = entity;
@@ -125,7 +125,12 @@ namespace Content.Client.Body.UI
 
         public void BodyPartOnItemSelected(ItemListSelectedEventArgs args)
         {
-            if (IoCManager.Resolve<IEntityManager>().TryGetComponent<SharedBodyComponent>(_currentEntity, out var body))
+            if (_currentEntity == null)
+                return;
+
+            var body = IoCManager.Resolve<IEntityManager>().GetComponentOrNull<SharedBodyComponent>(_currentEntity);
+
+            if (body == null)
             {
                 return;
             }

Content.Client/ContextMenu/UI/EntityMenuPresenter.cs

@@ -288,7 +288,7 @@ namespace Content.Client.ContextMenu.UI
 
             // Get the first entity in the sub-menus
             var entity = GetFirstEntityOrNull(element.SubMenu);
-            if (!entity.Valid)
+            if (entity == null)
             {
                 // This whole element has no associated entities. We should remove it
                 element.Dispose();

Content.Client/Decals/DecalOverlay.cs

@@ -4,8 +4,10 @@ using Robust.Client.Graphics;
 using Robust.Client.Utility;
 using Robust.Shared.Enums;
 using Robust.Shared.Map;
+using Robust.Shared.Maths;
 using Robust.Shared.Prototypes;
 using Robust.Shared.Utility;
+using Robust.Shared.Maths;
 
 namespace Content.Client.Decals
 {

Content.Client/Hands/HandsGui.xaml.cs

@@ -99,7 +99,8 @@ namespace Content.Client.Hands
                 _itemSlotManager.SetItemSlot(newButton, hand.HeldItem);
 
                 // Show blocked overlay if hand is blocked.
-                newButton.Blocked.Visible = IoCManager.Resolve<IEntityManager>().HasComponent<HandVirtualItemComponent>(hand.HeldItem);
+                newButton.Blocked.Visible =
+                    hand.HeldItem != null && IoCManager.Resolve<IEntityManager>().HasComponent<HandVirtualItemComponent>(hand.HeldItem);
             }
 
             if (TryGetActiveHand(out var activeHand))

Content.Client/Inventory/StrippableBoundUserInterface.cs

@@ -29,7 +29,7 @@ namespace Content.Client.Inventory
         {
             base.Open();
 
-            _strippingMenu = new StrippingMenu($"{Loc.GetString("strippable-bound-user-interface-stripping-menu-title",("ownerName", IoCManager.Resolve<IEntityManager>().GetComponent<MetaDataComponent>(Owner.Owner).EntityName))}");
+            _strippingMenu = new StrippingMenu($"{Loc.GetString("strippable-bound-user-interface-stripping-menu-title",("ownerName", Name: IoCManager.Resolve<IEntityManager>().GetComponent<MetaDataComponent>(Owner.Owner).EntityName))}");
 
             _strippingMenu.OnClose += Close;
             _strippingMenu.OpenCentered();

Content.Client/MedicalScanner/UI/MedicalScannerWindow.xaml.cs

@@ -36,7 +36,7 @@ namespace Content.Client.MedicalScanner.UI
             }
             else
             {
-                text.Append($"{Loc.GetString("medical-scanner-window-entity-health-text", ("entityName", entities.GetComponent<MetaDataComponent>(state.Entity.Value).EntityName))}\n");
+                text.Append($"{Loc.GetString("medical-scanner-window-entity-health-text", ("entityName", Name: entities.GetComponent<MetaDataComponent>(state.Entity.Value).EntityName))}\n");
 
                 var totalDamage = state.DamagePerType.Values.Sum();