fix(ui): restore retail vitals and window interactions

tests/AcDream.App.Tests/UI/CursorFeedbackControllerTests.cs

@@ -1,4 +1,6 @@
 using AcDream.App.UI;
+using AcDream.App.UI.Layout;
+using AcDream.App.Tests.UI.Layout;
 using AcDream.Core.Combat;
 using AcDream.Core.Items;
 
@@ -354,7 +356,7 @@ public sealed class CursorFeedbackControllerTests
     }
 
     [Fact]
-    public void UpdateFromRoot_worldProviderDrivesTargetCursor_whenUiNotHovered()
+    public void UpdateFromRoot_worldProviderContinuesBehindNonItemUi()
     {
         var objects = SeedTargetObjects();
         var interaction = new ItemInteractionController(
@@ -376,11 +378,38 @@ public sealed class CursorFeedbackControllerTests
         // World hover (retail SmartBox found object) drives valid/invalid…
         Assert.Equal(CursorFeedbackKind.TargetValid, c.Update(root).Kind);
 
-        // …but UI occludes the world: hovering a plain panel → PENDING even
-        // though the world provider would return a valid target.
+        // UIElement_SmartBoxWrapper::FindObject @0x004E5430 only returns
+        // early for UIElement_UIItem. Ordinary UI chrome falls through to
+        // SmartBox::find_object, so it does not occlude the world pick.
         var panel = new UiPanel { Left = 390, Top = 290, Width = 40, Height = 40 };
         root.AddChild(panel);
-        Assert.Equal(CursorFeedbackKind.TargetPending, c.Update(root).Kind);
+        Assert.Equal(CursorFeedbackKind.TargetValid, c.Update(root).Kind);
+    }
+
+    [Fact]
+    public void UpdateFromRoot_toolbarBackpackRepresentsSelfAndShowsFoundCursorWithoutWorldHit()
+    {
+        ImportedLayout toolbar = FixtureLoader.LoadToolbar();
+        using ToolbarController controller = ToolbarController.Bind(
+            toolbar,
+            new ClientObjectTable(),
+            new ShortcutStore(),
+            iconIds: static (_, _, _, _, _) => 0u,
+            useItem: static _ => { },
+            playerGuid: () => Player);
+        var root = new UiRoot { Width = 800, Height = 600 };
+        root.AddChild(toolbar.Root);
+        var backpack = Assert.IsType<UiButton>(toolbar.FindElement(0x100001B1u));
+        System.Numerics.Vector2 position = backpack.ScreenPosition;
+        root.OnMouseMove(
+            (int)(position.X + backpack.Width * 0.5f),
+            (int)(position.Y + backpack.Height * 0.5f));
+        var c = new CursorFeedbackController(worldTargetProvider: () => 0u);
+
+        CursorFeedback feedback = c.Update(root);
+
+        Assert.Equal(CursorFeedbackKind.Default, feedback.Kind);
+        Assert.Equal(RetailGlobalCursorKind.DefaultFound, feedback.GlobalKind);
     }
 
     [Fact]