refactor(world): extract live entity network updates

Move Position, Vector, State, Movement, and equal-generation CreateObject routing out of GameWindow while preserving per-channel authority, ForcePosition acknowledgement, and motion-runtime ownership. Add adversarial authority and exact-wire coverage so reentrant updates and GUID reuse cannot publish stale state.

src/AcDream.App/Physics/LiveEntityVectorRoute.cs

@@ -0,0 +1,34 @@
+namespace AcDream.App.Physics;
+
+internal enum LiveEntityVectorRoute
+{
+    Projectile,
+    CanonicalBody,
+    OrdinaryRemote,
+}
+
+/// <summary>
+/// Pins retail's one-CPhysicsObj vector-update priority. A missile owns its
+/// canonical body first; otherwise a retained static body consumes the wire
+/// vector; only an ordinary remote reaches MovementManager storage.
+/// </summary>
+internal static class LiveEntityVectorRouter
+{
+    internal static LiveEntityVectorRoute Route(
+        Func<bool> tryProjectile,
+        Func<bool> tryCanonicalBody,
+        Action applyOrdinaryRemote)
+    {
+        ArgumentNullException.ThrowIfNull(tryProjectile);
+        ArgumentNullException.ThrowIfNull(tryCanonicalBody);
+        ArgumentNullException.ThrowIfNull(applyOrdinaryRemote);
+
+        if (tryProjectile())
+            return LiveEntityVectorRoute.Projectile;
+        if (tryCanonicalBody())
+            return LiveEntityVectorRoute.CanonicalBody;
+
+        applyOrdinaryRemote();
+        return LiveEntityVectorRoute.OrdinaryRemote;
+    }
+}