refactor(app): key live projections by runtime identity

Move materialized live-object sidecars and presentation worksets to exact RuntimeEntityKey ownership. Runtime remains the only GUID/incarnation/local-ID authority while hydration, animation, effects, lights, equipped children, renderer resources, visibility, liveness, and teardown resolve exact projection identities. Preserve synchronous callbacks, local-ID allocation order, and current rendering behavior.

src/AcDream.App/Interaction/WorldSelectionQuery.cs

@@ -239,8 +239,10 @@ internal sealed class WorldSelectionQuery
             return null;
 
         ClosestCombatTarget? best = null;
-        foreach ((uint guid, WorldEntity entity) in _liveEntities.WorldEntities)
+        foreach (LiveEntityRecord record in _liveEntities.VisibleRecords)
         {
+            uint guid = record.ServerGuid;
+            WorldEntity entity = record.WorldEntity!;
             if (!IsHostileMonster(guid))
                 continue;
             float distanceSquared = Vector3.DistanceSquared(entity.Position, player.Position);