fix(physics): keep remote placement and targeting in one world frame

CreateObject positions are landblock-local, but Runtime first-entry previously submitted remotes with a zero world offset. Runtime now owns the accepted local-player world-frame center and converts remote placements before SetPosition. The local physics host also publishes body.Position rather than CellPosition's landblock-local origin, so TargetManager no longer directs monsters toward a phantom player position. User gate: monster/static placement, chase, and attacks accepted outside Tusker Barracks.

src/AcDream.Runtime/Physics/RuntimeSetPositionMoverPreparation.cs

@@ -57,7 +57,8 @@ internal readonly record struct RuntimeSetPositionMoverPreparation(
     uint ScatterAttempts = 0u,
     float ShadowWorldOffsetX = 0f,
     float ShadowWorldOffsetY = 0f,
-    RuntimePortalPlacementAuthority Portal = default);
+    RuntimePortalPlacementAuthority Portal = default,
+    bool ResolveWorldOffsetFromRuntimeFrame = false);
 
 /// <summary>
 /// Pure preparation port of the mover inputs consumed by retail