refactor(net): converge live session state reset

tests/AcDream.App.Tests/UI/Layout/RetailDialogFactoryTests.cs

@@ -187,6 +187,74 @@ public sealed class RetailDialogFactoryTests
         Assert.Null(root.Modal);
     }
 
+    [Fact]
+    public void Reset_CompletesEveryDialogAndKeepsContextSequenceMonotonic()
+    {
+        var root = new UiRoot { Width = 800f, Height = 600f };
+        var layouts = new List<ImportedLayout>();
+        var factory = CreateFactory(root, layouts);
+        int callbacks = 0;
+        int notices = 0;
+        factory.DialogClosed += (_, _) => notices++;
+
+        uint first = factory.MakeConfirmation("active", _ => callbacks++);
+        factory.MakeConfirmation("pending", _ => callbacks++);
+        factory.Reset();
+
+        Assert.Equal(1u, first);
+        Assert.Equal(2, callbacks);
+        Assert.Equal(2, notices);
+        Assert.False(factory.IsOpen);
+        Assert.Equal(0, factory.PendingCount);
+        Assert.Null(root.Modal);
+        Assert.Empty(root.Children);
+        Assert.Equal(3u, factory.MakeConfirmation("new session"));
+    }
+
+    [Fact]
+    public void Reset_AttemptsEveryDialogWhenOneCallbackThrows()
+    {
+        var root = new UiRoot { Width = 800f, Height = 600f };
+        var layouts = new List<ImportedLayout>();
+        var factory = CreateFactory(root, layouts);
+        int completed = 0;
+
+        factory.MakeConfirmation("active", _ => throw new InvalidOperationException("boom"));
+        factory.MakeConfirmation("pending", _ => completed++);
+
+        AggregateException error = Assert.Throws<AggregateException>(factory.Reset);
+
+        Assert.Contains("boom", error.ToString());
+        Assert.Equal(1, completed);
+        Assert.False(factory.IsOpen);
+        Assert.Equal(0, factory.PendingCount);
+        Assert.Null(root.Modal);
+        Assert.Empty(root.Children);
+        factory.Reset();
+    }
+
+    [Fact]
+    public void Reset_DrainsDialogCreatedReentrantlyByCompletionCallback()
+    {
+        var root = new UiRoot { Width = 800f, Height = 600f };
+        var layouts = new List<ImportedLayout>();
+        var factory = CreateFactory(root, layouts);
+        int completed = 0;
+        factory.MakeConfirmation("first", _ =>
+        {
+            completed++;
+            factory.MakeConfirmation("reentrant", _ => completed++);
+        });
+
+        factory.Reset();
+
+        Assert.Equal(2, completed);
+        Assert.False(factory.IsOpen);
+        Assert.Equal(0, factory.PendingCount);
+        Assert.Null(root.Modal);
+        Assert.Empty(root.Children);
+    }
+
     private static RetailDialogFactory CreateFactory(
         UiRoot root,
         List<ImportedLayout> layouts)