fix(plugins): close LA5 host lifecycle review

src/AcDream.App/Rendering/GameWindowLifetime.cs

@@ -71,6 +71,7 @@ internal sealed record IngressShutdownRoots(
     RetailUiRuntimeLease RetailUi,
     // Keeps failed physical UI bindings alive through native-window release.
     UiHost? RetainedUiHost,
+    IDisposable? Plugins,
     GameRuntime Runtime,
     DispatcherMovementInputSource MovementInput,
     DispatcherCameraInputSource CameraInput,
@@ -422,6 +423,10 @@ internal static class GameWindowShutdownManifest
                 Soft("keyboard source", () => DisposeKeyboardSource(ingress.KeyboardSource)),
                 Soft("native window callbacks", () => DisposeWindowCallbacks(ingress.WindowCallbacks)),
             ]),
+            new ResourceShutdownStage("plugin host",
+            [
+                Hard("plugins", () => ingress.Plugins?.Dispose()),
+            ]),
             new ResourceShutdownStage("frame borrowers",
             [
                 Hard("world frame composition", () => frame.FrameGraphPublication?.Dispose()),