fix(streaming): retire stale portal-region entities

Port retail's 25-second leave-visibility lifetime over canonical live records, retaining spatially resident and owned entities while using the conservative ACE visibility envelope for nonresident records. Route expiry through the normal generation-safe F747 teardown so animations, effects, physics, and render owners unwind symmetrically.

Replace the append-only modern mesh buffer with coalescing vertex/index ranges and upload each mesh's vertices once instead of once per material. Released zero-reference meshes can now reuse GPU ranges after portal and cache churn.

A connected five-region round trip returned animation ownership to baseline, recreated the starting region on revisit, and held normal FPS. Release build succeeds and all 5,927 tests pass with five intentional skips.

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

docs/architecture/retail-divergence-register.md

@@ -169,7 +169,7 @@ AP-94..AP-112 for the confirmed retail-UI completion gaps.
 | AP-65 | **PickupEvent (0xF74A) no longer evicts the weenie from `ClientObjectTable`** — only `DeleteObject (0xF747)` evicts, matching the retail `object_table`-vs-`weenie_object_table` split. An item another player picks up near you (only ever gets `PickupEvent`, never `DeleteObject`) lingers as a data-only entry (`ContainerId 0`, not in any view) until teleport/relog `Clear()`. | `src/AcDream.Core.Net/ObjectTableWiring.cs` (EntityDeleted handler); `src/AcDream.Core.Net/WorldSession.cs` (PickupEvent branch) | The weenie entry for nearby pickups is a harmless data ghost — no UI shows it (no container, not wielded). Retail evicts it from `weenie_object_table` when the object fully leaves interest range via `DeleteObject`; acdream defers to teleport/relog clear. | Slight memory growth in long sessions if many world items are picked up by other players near you; item data ghosts cannot cause functional issues because no UI queries `ContainerId 0`. | `CACObjectMaint::DeleteObject` / `SmartBox::HandleDeleteObject`; ACE `Player_Inventory.cs TryDequipObjectWithNetworking` |
 | ~~AP-66~~ | **RETIRED 2026-07-13 — authored paperdoll empty-slot presentation.** The earlier “no silhouettes” conclusion inspected the ItemList elements' own media but missed `UIElement_ItemList::InternalCreateItem`, which clones a distinct `UIElement_UIItem` catalog prototype for each location. All 21 supported jewelry, weapon, ammo, shield, clothing, cloak, trinket, and armor lists now resolve their exact `ItemSlot_Empty` surface from live DAT; `PostInit` confirms non-armor lists remain visible while the nine armor lists toggle with Slots. | `src/AcDream.App/UI/Layout/PaperdollSlotBackgrounds.cs`; `ItemListCellTemplate.cs`; `PaperdollController.cs` | — | — | `gmPaperDollUI::GetLocationInfoFromElementID @ 0x004A37F0`; `PostInit @ 0x004A5360`; `UIElement_ItemList::InternalCreateItem @ 0x004E3570`; `LayoutDesc 0x21000037` |
 | AP-68 | acdream keeps the 128 nearest-to-CAMERA point lights live (`MaxGlobalLights=128`, `BuildPointLightSnapshot`) and selects per cell CAMERA-INDEPENDENTLY (by the cell's own bounds), so a building interior stays lit at any distance within a town; retail keeps only the 40 nearest-to-PLAYER static lights (`Render::max_static_lights=0x28`, distance-sorted replace-farthest `insert_light`) and re-bakes a cell when its live light set changes, so distant interiors are baked dark and "light up" only as the player approaches and their torches enter the live 40. INTENTIONAL — acdream's always-lit interiors are the preferred behavior (no 1999-era light-budget pop-in); user-confirmed 2026-06-20. | `src/AcDream.Core/Lighting/LightManager.cs` (`MaxGlobalLights=128`, `BuildPointLightSnapshot`, `SelectForObject`) | The retail pop-in is a fixed-function light-budget artifact, not an intended aesthetic; revert to retail by clamping the global set to 40 + distance-to-player sort if ever desired | Distant town interiors are lit in acdream where retail's are dark until approached — a deliberate, user-preferred divergence | `Render::max_static_lights` 0x28; `insert_light` 0x0054d1b0 (distance-sorted, replace-farthest); bake re-trigger `SetStaticLightingVertexColors` cache `burnedInStaticLights != num_static_lights` |
-| AP-69 | On a landblock unload/reload, acdream retains the accepted live record and the same `WorldEntity`. Full unload moves non-persistent live projections to that landblock's pending bucket; Near→Far demotion drops only dat-static layers and leaves live projections resident. Neither path replays logical registration or reconstructs from a stale CreateObject. ACE will NOT re-broadcast objects whose guid remains in its per-player `KnownObjects` set, matching retail's retained object-table model. DIVERGENCE: acdream has NO retail 25 s / 384 m visibility cull — the retained record is pruned ONLY by an explicit server `DeleteObject` (0xF747) or session teardown. (#138) | `src/AcDream.App/World/LiveEntityRuntime.cs`; `src/AcDream.App/Streaming/GpuWorldState.cs`; `GameWindow.RehydrateServerEntitiesForLandblock`; `StreamingController` (`onLandblockLoaded`, Loaded + Promoted) | Stable logical identity is retail-faithful and prevents duplicated meshes, scripts, emitters, or stale-spawn teleports while remaining independent of an ACE re-broadcast | An object the server silently stopped tracking WITHOUT a `DeleteObject` (e.g. a creature that wandered out of PVS) can reappear at its last-known position, where retail's 25 s cull would have dropped it — a stale ghost until a real `DeleteObject` or the next session. Close it by porting holtburger's 25 s/384 m `ACE_DESTRUCTION_TIMEOUT` self-cull | `CPhysicsObj::change_cell` 0x00513390; `CPhysicsObj::leave_world` 0x005155A0; ACE `ObjectMaint.KnownObjects` never cleared on teleport (`Physics/Common/ObjectMaint.cs`, `WorldObjects/Player_Tracking.cs`); holtburger client 25 s cull `liveness.rs` `ACE_DESTRUCTION_TIMEOUT_SECS` |
+| AP-69 | acdream now preserves one accepted live record across rebucketing and ports retail's 25-second leave-visibility destruction lifecycle. Spatially resident records cancel expiry; otherwise the ACE compatibility boundary uses holtburger's conservative 384-unit distance envelope and retains attached/container/wielder/parent-owned objects. Expiry routes through the exact generation-safe F747 teardown. DIVERGENCE: the fallback does not yet derive visibility from retail/ACE ObjCell PVS (`SeenOutside` plus `VisibleCells`), and trade/container preview retention has no separate lifecycle flag. | `src/AcDream.App/World/LiveEntityRuntime.cs`; `src/AcDream.App/World/LiveEntityLivenessController.cs`; `src/AcDream.App/Streaming/GpuWorldState.cs`; `GameWindow.OnLiveEntityPruned` | Prevents stale portal destinations from accumulating animation/effect/render owners while retaining loaded long-view objects and canonical identity | A nonresident object outside 384 units that remains visible through an unusual long EnvCell PVS could expire early; a future preview-only object with no parent/container ownership could also expire. Replace the compatibility predicate when exact ObjCell PVS and preview lifetimes are available | `CPhysicsObj::prepare_to_leave_visibility` 0x00511F40; `CPhysicsObj::prepare_to_enter_world` 0x00511FA0; `CObjectMaint::AddObjectToBeDestroyed` 0x00508F70; `CObjectMaint::UseTime` 0x005089B0; `docs/research/2026-07-18-retail-object-liveness-and-mesh-reclamation-pseudocode.md` |
 | AP-71 | **`CEnvCell::find_env_collisions` omits the `CObjCell::check_entry_restrictions` gate** — retail's `CEnvCell::find_env_collisions` (pc:309576) calls `CObjCell::check_entry_restrictions` (pc:309576) FIRST and returns `COLLIDED` when an access-locked cell's `restriction_obj` entity rejects the mover (`CanMoveInto` fails AND `CanBypassMoveRestrictions` is false). acdream's `FindEnvCollisions` (`src/AcDream.Core/Physics/TransitionTypes.cs:2088`) goes straight to BSP collision. | `src/AcDream.Core/Physics/TransitionTypes.cs:2088` | **No access-restriction cell data exists in acdream.** `CellPhysics` (`src/AcDream.Core/Physics/PhysicsDataCache.cs:540`) has no `restriction_obj` field; `DatReaderWriter` does not model per-cell access locks; no weenie-object-table exists on the client for the gate's `CanMoveInto` / `CanBypassMoveRestrictions` dispatch. The gap is **inert** in all dev content (ACE starter area has no access-locked env cells). | If access-locked dungeon cells are ever modeled (dat + wire), the player will walk through the restriction barrier without being blocked — wrong PK/housing gating. | `CObjCell::check_entry_restrictions` pc:309576; `CEnvCell::find_env_collisions` pc:309573–309597 |
 | AP-72 | **Cursor art falls back to OS standard cursors when dat resolution fails** — retail always renders MediaDescCursor / EnumIDMap-resolved dat cursor art; acdream's `RetailCursorManager.Apply` falls back to Silk `StandardCursor` (IBeam/crosshair/not-allowed/…) when the EnumIDMap chain or RenderSurface decode fails, and `RetailCursorResolver`/`RetailCursorManager` permanently negative-cache the failed enum/surface id for the session. | `src/AcDream.App/Rendering/RetailCursorManager.cs:47` (`ApplyStandard`), `RetailCursorResolver.cs:47` (negative cache) | Fallback triggers only when the dat lacks the asset — nominal EoR dats always resolve the 0x27/0x28/0x29 chain; an OS cursor keeps the UI usable rather than showing nothing. | A dat-read or decode regression silently shows OS-native cursors instead of surfacing an error — masked failure class; check the `[D.2b]` cursor log lines before suspecting art. | `ClientUISystem::UpdateCursorState` 0x00564630 |
 | AP-74 | **UseDone WeenieError text comes from a hardcoded subset map, not the portal String tables** — retail resolves the 0x01C7 UseDone error code through the client String tables into the canonical line ("You are not trained in healing!"); acdream's `WeenieErrorText.For` hardcodes the handful of codes the current use/heal flows produce (0x001D/0x04EB/0x04FC/0x04FE, texts phrased after the ACE enum names) with a generic code-carrying fallback. | `src/AcDream.Core.Net/Messages/WeenieErrorText.cs` | Every refusal is now visible; only unmapped wording deviates, and those lines retain the raw code. Retire by porting the String-table lookup (#202). | An unmapped WeenieError shows a generic line instead of retail's exact sentence | retail String-table error lookup; ACE `WeenieError.cs` values |