refactor(runtime): close simulation ownership

Move remote-motion construction, CreateObject vector initialization, final simulation-component retirement, and the combined J5 ownership ledger into Runtime. Delete App compatibility views and moved-state reconstruction while preserving the existing graphical projection and retail update order.

src/AcDream.Runtime/RuntimeSimulationOwnership.cs

@@ -0,0 +1,44 @@
+using AcDream.Runtime.Entities;
+using AcDream.Runtime.Gameplay;
+using AcDream.Runtime.Physics;
+
+namespace AcDream.Runtime;
+
+/// <summary>
+/// One allocation-free terminal ownership ledger for the complete J5
+/// presentation-independent simulation graph. It owns no mutable state.
+/// Graphical and no-window hosts inspect the same canonical owners.
+/// </summary>
+public readonly record struct RuntimeSimulationOwnershipSnapshot(
+    RuntimeEntityObjectOwnershipSnapshot EntityObjects,
+    RuntimePhysicsOwnershipSnapshot Physics,
+    RuntimeGameplayOwnershipSnapshot Gameplay)
+{
+    public bool IsConverged =>
+        EntityObjects.IsConverged
+        && Physics.IsConverged
+        && Gameplay.IsConverged;
+}
+
+public static class RuntimeSimulationOwnership
+{
+    public static RuntimeSimulationOwnershipSnapshot Capture(
+        RuntimeEntityObjectLifetime entityObjects,
+        RuntimeInventoryState inventory,
+        RuntimeCharacterState character,
+        RuntimeCommunicationState communication,
+        RuntimeActionState actions,
+        RuntimeLocalPlayerMovementState movement)
+    {
+        ArgumentNullException.ThrowIfNull(entityObjects);
+        return new RuntimeSimulationOwnershipSnapshot(
+            entityObjects.CaptureOwnership(),
+            entityObjects.Physics.CaptureOwnership(),
+            RuntimeGameplayOwnership.Capture(
+                inventory,
+                character,
+                communication,
+                actions,
+                movement));
+    }
+}