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/GameplayConfirmationController.cs

@@ -0,0 +1,91 @@
+using AcDream.App.UI.Layout;
+using AcDream.Core.Net.Messages;
+
+namespace AcDream.App.UI;
+
+/// <summary>
+/// Ports the server-driven confirmation ownership in
+/// <c>gmGamePlayUI @ 0x004E9D70..0x004E9EB6</c>. The dialog factory broadcasts
+/// completion; this semantic owner retains the server type/context and sends the
+/// matching confirmation response.
+/// </summary>
+public sealed class GameplayConfirmationController : IDisposable
+{
+    private readonly RetailDialogFactory _dialogs;
+    private readonly Action<uint, uint, bool> _sendResponse;
+    private uint _dialogContext;
+    private uint _serverType;
+    private uint _serverContext;
+    private bool _disposed;
+
+    public GameplayConfirmationController(
+        RetailDialogFactory dialogs,
+        Action<uint, uint, bool> sendResponse)
+    {
+        _dialogs = dialogs ?? throw new ArgumentNullException(nameof(dialogs));
+        _sendResponse = sendResponse ?? throw new ArgumentNullException(nameof(sendResponse));
+        _dialogs.DialogClosed += OnDialogClosed;
+    }
+
+    public uint ActiveDialogContext => _dialogContext;
+
+    public bool HandleRequest(GameEvents.CharacterConfirmationRequest request)
+    {
+        // ClientUISystem::Handle_Character__ConfirmationRequest @ 0x005640A0
+        // routes types 2/3/5/6 to handlers that append " Continue?"; the generic
+        // type-7 YesNo request preserves the server text verbatim. Types 1 and 4
+        // have allegiance/fellowship semantic owners but use the same response
+        // tuple, so this controller retains that tuple until those panels exist.
+        // Each retail RecvNotice_* handler stores the tuple before calling the
+        // shared maker, including the already-open case.
+        _serverType = request.Type;
+        _serverContext = request.ContextId;
+
+        // gmGamePlayUI::MakeGameplayConfirmationDialog @ 0x004EB890 refuses a
+        // second gameplay confirmation while its context is non-zero.
+        if (_dialogContext != 0u)
+            return false;
+
+        string message = request.Type is 2u or 3u or 5u or 6u
+            ? request.Message + " Continue?"
+            : request.Message;
+        var data = RetailDialogData.Confirmation(message)
+            .Set(RetailDialogProperty.ElementAttribute40, true);
+        _dialogContext = _dialogs.MakeDialog(data);
+        return _dialogContext != 0u;
+    }
+
+    public bool HandleDone(GameEvents.CharacterConfirmationDone done)
+    {
+        // gmGamePlayUI::RecvNotice_AbortConfirmationRequest @ 0x004E9D70
+        // matches both server fields before closing the local dialog context.
+        if (_dialogContext == 0u
+            || done.Type != _serverType
+            || done.ContextId != _serverContext)
+            return false;
+        return _dialogs.CloseDialog(_dialogContext);
+    }
+
+    public void Dispose()
+    {
+        if (_disposed) return;
+        _disposed = true;
+        _dialogs.DialogClosed -= OnDialogClosed;
+    }
+
+    private void OnDialogClosed(uint context, RetailDialogData data)
+    {
+        if (context != _dialogContext
+            || data.GetUInt32(RetailDialogProperty.Type) !=
+                (uint)RetailDialogType.Confirmation)
+            return;
+
+        bool accepted = data.GetBoolean(RetailDialogProperty.ConfirmationResult);
+        // gmGamePlayUI::CloseGameplayConfirmationDialog @ 0x004E9E80 sends
+        // before clearing its retained server/dialog context fields.
+        _sendResponse(_serverType, _serverContext, accepted);
+        _dialogContext = 0u;
+        _serverType = 0u;
+        _serverContext = 0u;
+    }
+}