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/Rendering/GameWindow.cs

@@ -2208,6 +2208,9 @@ public sealed class GameWindow : IDisposable
                     Cursor: new AcDream.App.UI.RetailUiCursorBindings(
                         cursorFeedbackController,
                         retailCursorManager),
+                    Confirmations: new AcDream.App.UI.ConfirmationRuntimeBindings(
+                        (type, context, accepted) =>
+                            _liveSession?.SendConfirmationResponse(type, context, accepted)),
                     StackSplitQuantity: _stackSplitQuantity,
                     Plugins: _uiRegistry,
                     Persistence: persistence,
@@ -2659,12 +2662,9 @@ public sealed class GameWindow : IDisposable
                 onUseDone: error => _itemInteractionController?.CompleteUse(error),
                 itemMana: ItemMana,
                 onConfirmationRequest: request =>
-                    _retailUiRuntime?.ConfirmationDialogs?.Show(
-                        request.Message,
-                        accepted => session.SendConfirmationResponse(
-                            request.Type,
-                            request.ContextId,
-                            accepted)),
+                    _retailUiRuntime?.HandleConfirmationRequest(request),
+                onConfirmationDone: done =>
+                    _retailUiRuntime?.HandleConfirmationDone(done),
                 friends: Friends,
                 squelch: Squelch,
                 onDesiredComponents: components => DesiredComponents = components);
@@ -2764,7 +2764,7 @@ public sealed class GameWindow : IDisposable
                     LastOutsideCorpsePosition: () =>
                         LocalPlayer.GetPosition(0x0Eu),
                     ShowConfirmation: (message, completed) =>
-                        _retailUiRuntime?.ConfirmationDialogs?.Show(message, completed),
+                        _retailUiRuntime?.ShowConfirmation(message, completed),
                     Suicide: liveSession.SendSuicide,
                     ClearChat: _ => chat.Clear(),
                     SaveUi: name => _retailUiRuntime?.SaveNamedLayout(name),