refactor(update): cut over the frame orchestrator

Reduce GameWindow.OnUpdate to one typed orchestration call and remove transitive window callbacks from teardown, liveness, teleport placement, live presentation, auto-entry, and entity packet routing. Preserve the frozen retail object/network order while making the production owner graph explicit and testable.

src/AcDream.App/Physics/RemoteShadowPlacementSynchronizer.cs

@@ -0,0 +1,49 @@
+using AcDream.App.World;
+using AcDream.Core.Physics;
+using AcDream.Core.World;
+
+namespace AcDream.App.Physics;
+
+/// <summary>Synchronizes a resolved remote placement in the current live origin.</summary>
+internal sealed class RemoteShadowPlacementSynchronizer
+{
+    private readonly RemotePhysicsUpdater _remotePhysics;
+    private readonly LiveWorldOriginState _origin;
+
+    public RemoteShadowPlacementSynchronizer(
+        RemotePhysicsUpdater remotePhysics,
+        LiveWorldOriginState origin)
+    {
+        _remotePhysics = remotePhysics
+            ?? throw new ArgumentNullException(nameof(remotePhysics));
+        _origin = origin ?? throw new ArgumentNullException(nameof(origin));
+    }
+
+    public void Sync(WorldEntity entity, PhysicsBody body, uint cellId) =>
+        _remotePhysics.SyncRemoteShadowToBody(
+            entity.Id,
+            body,
+            _origin.CenterX,
+            _origin.CenterY,
+            cellId);
+}
+
+/// <summary>Bridges remote placement ownership to live presentation state.</summary>
+internal sealed class RemoteTeleportPlacementPresentation
+{
+    private readonly LiveEntityPresentationController _presentation;
+
+    public RemoteTeleportPlacementPresentation(
+        LiveEntityPresentationController presentation) =>
+        _presentation = presentation
+            ?? throw new ArgumentNullException(nameof(presentation));
+
+    public void Complete(uint serverGuid, ushort generation, bool deferShadowRestore) =>
+        _presentation.CompleteAuthoritativePlacement(
+            serverGuid,
+            generation,
+            deferShadowRestore);
+
+    public void Begin(uint serverGuid, ushort generation) =>
+        _presentation.BeginAuthoritativePlacement(serverGuid, generation);
+}