Stack and storage enhancements (#16405)

Content.Server/Stack/StackSystem.cs

@@ -1,7 +1,10 @@
+using Content.Server.Storage.Components;
+using Content.Server.Storage.EntitySystems;
 using Content.Shared.Popups;
 using Content.Shared.Stacks;
 using Content.Shared.Verbs;
 using JetBrains.Annotations;
+using Robust.Server.Containers;
 using Robust.Shared.Map;
 using Robust.Shared.Prototypes;
 
@@ -14,6 +17,8 @@ namespace Content.Server.Stack
     [UsedImplicitly]
     public sealed class StackSystem : SharedStackSystem
     {
+        [Dependency] private readonly ContainerSystem _container = default!;
+        [Dependency] private readonly StorageSystem _storage = default!;
         [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
 
         public static readonly int[] DefaultSplitAmounts = { 1, 5, 10, 20, 30, 50 };
@@ -160,6 +165,12 @@ namespace Content.Server.Stack
             if (Split(uid, amount, userTransform.Coordinates, stack) is not {} split)
                 return;
 
+            if (_container.TryGetContainingContainer(uid, out var container) &&
+                TryComp<ServerStorageComponent>(container.Owner, out var storage))
+            {
+                _storage.UpdateStorageUI(container.Owner, storage);
+            }
+
             HandsSystem.PickupOrDrop(userUid, split);
 
             PopupSystem.PopupCursor(Loc.GetString("comp-stack-split"), userUid);