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>

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

@@ -0,0 +1,58 @@
+using AcDream.App.UI;
+using AcDream.App.UI.Layout;
+using AcDream.App.Tests.UI.Layout;
+using AcDream.Core.Net.Messages;
+
+namespace AcDream.App.Tests.UI;
+
+public sealed class GameplayConfirmationControllerTests
+{
+    [Fact]
+    public void SkillRequestAppendsContinueAndCloseNoticeSendsServerTuple()
+    {
+        var root = new UiRoot { Width = 800f, Height = 600f };
+        ImportedLayout? shown = null;
+        var factory = new RetailDialogFactory(root, _ =>
+            shown = FixtureLoader.LoadConfirmationDialog());
+        var responses = new List<(uint Type, uint Context, bool Accepted)>();
+        using var controller = new GameplayConfirmationController(
+            factory,
+            (type, context, accepted) => responses.Add((type, context, accepted)));
+
+        Assert.True(controller.HandleRequest(
+            new GameEvents.CharacterConfirmationRequest(2u, 42u, "Raise this skill?")));
+        Assert.Equal(
+            "Raise this skill? Continue?",
+            string.Join(" ", Assert.IsType<UiText>(shown!.FindElement(
+                RetailConfirmationDialogView.MessageElementId)).LinesProvider().Select(static line => line.Text)));
+
+        Assert.IsType<UiButton>(shown.FindElement(
+            RetailConfirmationDialogView.AcceptButtonId)).OnClick!();
+
+        Assert.Equal([(2u, 42u, true)], responses);
+        Assert.Equal(0u, controller.ActiveDialogContext);
+    }
+
+    [Fact]
+    public void MatchingConfirmationDoneClosesDialogAndUnmatchedTupleDoesNothing()
+    {
+        var root = new UiRoot { Width = 800f, Height = 600f };
+        var factory = new RetailDialogFactory(root, _ =>
+            FixtureLoader.LoadConfirmationDialog());
+        var responses = new List<(uint Type, uint Context, bool Accepted)>();
+        using var controller = new GameplayConfirmationController(
+            factory,
+            (type, context, accepted) => responses.Add((type, context, accepted)));
+        controller.HandleRequest(new GameEvents.CharacterConfirmationRequest(7u, 99u, "Proceed?"));
+
+        Assert.False(controller.HandleDone(
+            new GameEvents.CharacterConfirmationDone(7u, 100u)));
+        Assert.True(factory.IsOpen);
+        Assert.True(controller.HandleDone(
+            new GameEvents.CharacterConfirmationDone(7u, 99u)));
+
+        Assert.False(factory.IsOpen);
+        Assert.Equal([(7u, 99u, false)], responses);
+    }
+
+}