feat(ui): complete retail quick-slot input

Port global toolbar use/select/create actions, migrate the collapsed Ctrl-number bindings, and route them through a focused retained-UI controller. Preserve shortcut aliases as aliases across inventory and paperdoll drops with retail's neutral/accept/reject drag states, preventing physical item moves such as unwielding an equipped helmet.

Co-Authored-By: Codex <codex@openai.com>

src/AcDream.App/UI/Layout/ToolbarInputController.cs

@@ -0,0 +1,71 @@
+using AcDream.Core.Selection;
+using AcDream.UI.Abstractions.Input;
+
+namespace AcDream.App.UI.Layout;
+
+/// <summary>
+/// Focused retained-toolbar adapter for retail global input actions. The input
+/// dispatcher owns chords/scopes; this class only maps semantic actions to the
+/// exact <c>gmToolbarUI::ListenToGlobalMessage @ 0x004BE4E0</c> slot intent.
+/// </summary>
+public sealed class ToolbarInputController
+{
+    private readonly ToolbarController _toolbar;
+    private readonly SelectionState _selection;
+
+    public ToolbarInputController(ToolbarController toolbar, SelectionState selection)
+    {
+        _toolbar = toolbar ?? throw new ArgumentNullException(nameof(toolbar));
+        _selection = selection ?? throw new ArgumentNullException(nameof(selection));
+    }
+
+    /// <summary>Returns true when <paramref name="action"/> belongs to the toolbar.</summary>
+    public bool Handle(InputAction action)
+    {
+        if (TryMapShortcut(action, out int slot, out bool use))
+        {
+            _toolbar.UseShortcut(slot, use);
+            return true;
+        }
+
+        if (action == InputAction.CreateShortcut)
+        {
+            _toolbar.CreateShortcutToItem(_selection.SelectedObjectId ?? 0u);
+            return true;
+        }
+
+        return false;
+    }
+
+    internal static bool TryMapShortcut(InputAction action, out int slot, out bool use)
+    {
+        int value = (int)action;
+        if (value >= (int)InputAction.UseQuickSlot_1
+            && value <= (int)InputAction.UseQuickSlot_9)
+        {
+            slot = value - (int)InputAction.UseQuickSlot_1;
+            use = true;
+            return true;
+        }
+
+        if (value >= (int)InputAction.SelectQuickSlot_1
+            && value <= (int)InputAction.SelectQuickSlot_9)
+        {
+            slot = value - (int)InputAction.SelectQuickSlot_1;
+            use = false;
+            return true;
+        }
+
+        if (value >= (int)InputAction.UseQuickSlot_14
+            && value <= (int)InputAction.UseQuickSlot_18)
+        {
+            slot = 13 + value - (int)InputAction.UseQuickSlot_14;
+            use = true;
+            return true;
+        }
+
+        slot = -1;
+        use = false;
+        return false;
+    }
+}