Decouple interactions from hands, cleanup old events, add new fears (#28393)

* ok basic shit

* second part

* pretend it isn't real it can't hurt you.

* 👁️ 👁️

* shadowcommander review

Content.Shared/Hands/EntitySystems/SharedHandsSystem.Interactions.cs

@@ -3,6 +3,7 @@ using Content.Shared.Examine;
 using Content.Shared.Hands.Components;
 using Content.Shared.IdentityManagement;
 using Content.Shared.Input;
+using Content.Shared.Interaction;
 using Content.Shared.Inventory.VirtualItem;
 using Content.Shared.Localizations;
 using Robust.Shared.Input.Binding;
@@ -23,6 +24,7 @@ public abstract partial class SharedHandsSystem : EntitySystem
         SubscribeAllEvent<RequestMoveHandItemEvent>(HandleMoveItemFromHand);
         SubscribeAllEvent<RequestHandAltInteractEvent>(HandleHandAltInteract);
 
+        SubscribeLocalEvent<HandsComponent, GetUsedEntityEvent>(OnGetUsedEntity);
         SubscribeLocalEvent<HandsComponent, ExaminedEvent>(HandleExamined);
 
         CommandBinds.Builder
@@ -181,6 +183,18 @@ public abstract partial class SharedHandsSystem : EntitySystem
         return true;
     }
 
+    private void OnGetUsedEntity(EntityUid uid, HandsComponent component, ref GetUsedEntityEvent args)
+    {
+        if (args.Handled)
+            return;
+
+        // TODO: this pattern is super uncommon, but it might be worth changing GetUsedEntityEvent to be recursive.
+        if (TryComp<VirtualItemComponent>(component.ActiveHandEntity, out var virtualItem))
+            args.Used = virtualItem.BlockingEntity;
+        else
+            args.Used = component.ActiveHandEntity;
+    }
+
     //TODO: Actually shows all items/clothing/etc.
     private void HandleExamined(EntityUid examinedUid, HandsComponent handsComp, ExaminedEvent args)
     {