fix(portal): commit destination projection before reveal

Retail installs the destination CObjCell before hidden world simulation resumes. Rebucket the retained local-player projection inside the Place transaction so Hidden/UnHide scripts and particles settle behind the portal viewport instead of firing after reveal. Preserve the existing unloaded-cell scheduler gate and pin the ordering with a cross-landblock placement test.

Co-authored-by: OpenAI Codex <codex@openai.com>

src/AcDream.App/Streaming/LocalPlayerTeleportController.cs

@@ -236,6 +236,21 @@ internal sealed class LocalPlayerTeleportPlacement : ILocalPlayerTeleportPlaceme
             entity.SetPosition(controller.Position);
             entity.ParentCellId = controller.CellId;
             entity.Rotation = rotation;
+
+            // Retail CPhysicsObj::enter_world installs the object in its
+            // destination CObjCell before hidden scripts/particles resume.
+            // The accepted Position packet has already advanced FullCellId,
+            // but that wire fact alone does not move acdream's retained
+            // projection out of its source/pending GPU bucket. Commit both
+            // halves of the spatial move here, while portal space still owns
+            // the viewport, so CPhysicsObj::update_object's cell-gated tail
+            // can advance the Hidden/UnHide PES chain at retail's boundary.
+            if (!_liveEntities.RebucketLiveEntity(playerGuid, controller.CellId))
+            {
+                throw new InvalidOperationException(
+                    $"Teleport Place could not commit local player 0x{playerGuid:X8} "
+                    + $"to destination cell 0x{controller.CellId:X8}.");
+            }
         }
 
         // Retail teleport_hook tail @ 0x00514ED0 clears the local target and