feat(ui): port retail dialog factory lifecycle

Replace the single mutable confirmation service with retail's property-backed DialogFactory model: fresh DAT roots, context ids, queue groups, priority preemption, callback/close-notice ordering, and context cancellation. Route /die, server confirmation aborts, and guarded item use through focused semantic owners.

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

src/AcDream.App/UI/ItemInteractionController.cs

@@ -288,6 +288,21 @@ public sealed class ItemInteractionController : IDisposable
     public bool AcquireSelfTarget()
         => IsTargetModeActive && AcquireTarget(_playerGuid());
 
+    /// <summary>
+    /// Completes the positive branch of retail
+    /// <c>ClientUISystem::UsageCallback @ 0x00565B20</c>. Confirmation policy has
+    /// already consumed the original activation, so acceptance sends the retained
+    /// object id and enters the same busy state as an ordinary use.
+    /// </summary>
+    public bool ExecuteConfirmedUse(uint objectId)
+    {
+        if (objectId == 0u || _sendUse is null)
+            return false;
+        _sendUse(objectId);
+        _busyCount++;
+        return true;
+    }
+
     public void CancelTargetMode()
     {
         if (!IsAnyTargetModeActive) return;