refactor(net): converge live session state reset

src/AcDream.App/UI/GameplayConfirmationController.cs

@@ -66,6 +66,17 @@ public sealed class GameplayConfirmationController : IDisposable
         return _dialogs.CloseDialog(_dialogContext);
     }
 
+    /// <summary>
+    /// Forget any tuple left after the dialog factory has completed its normal
+    /// retail close/reset callbacks.
+    /// </summary>
+    public void ResetSession()
+    {
+        _dialogContext = 0u;
+        _serverType = 0u;
+        _serverContext = 0u;
+    }
+
     public void Dispose()
     {
         if (_disposed) return;