Publish the retail blocking-for-cells edge before deferred recenter work, freeze old-world presentation/simulation/audio, and advance full-window retirement from exact metered entity and owner cursors. This removes synchronous portal teardown without allowing retained owners to remain observable.
Compose destination readiness and lifecycle telemetry behind one App-layer coordinator so login and portal begin, preparation, materialization, visibility, completion, and cancellation cannot drift apart in GameWindow wiring.
