fix(items): finish corpse pickup and combat switching

Port retail's first-slot ShowPendingInPlayer path for double-click loot and carry the current owned-container destination through deferred pickup. Retire the previous ground-container view as soon as a replacement is requested so its range close cannot cancel ACE's active MoveTo chain.

Preserve active-combat weapon intent across ACE's authoritative wand-to-missile stance tail while leaving peace-mode switches unchanged.

Release build succeeds and all 5,885 tests pass with five intentional skips.

Co-authored-by: OpenAI Codex <codex@openai.com>

src/AcDream.App/UI/RetailUiRuntime.cs

@@ -274,6 +274,7 @@ public sealed class RetailUiRuntime : IDisposable
     public SelectedObjectController? SelectedObjectController { get; private set; }
     public UiViewport? PaperdollViewportWidget { get; private set; }
     public UiNineSlicePanel? InventoryFrame { get; private set; }
+    public InventoryController? InventoryPanelController { get; private set; }
     public RetailDialogFactory? DialogFactory { get; private set; }
     public ExternalContainerController? ExternalContainerController { get; private set; }
 
@@ -1603,6 +1604,7 @@ public sealed class RetailUiRuntime : IDisposable
             () => CloseWindow(WindowNames.Inventory),
             StackSplitQuantity,
             b.ResolveDragIcon);
+        InventoryPanelController = inventory;
         PaperdollController paperdoll = PaperdollController.Bind(
             layout, b.Objects, b.PlayerGuid, b.ResolveIcon, b.Selection, b.ItemInteraction,
             contents, _bindings.Assets.DefaultFont, paperdollClickMap,