docs(runtime): close cost-budgeted streaming slice

Record the exact physical-display evidence, ownership fixes, budget semantics, and performance deltas that close Slice E. Reconcile the architecture, roadmap, milestones, issues, documentation map, and session instructions before the explicit F/G approval gate.

Co-authored-by: Erik Nilsson <erikn@users.noreply.github.com>

docs/architecture/code-structure.md

@@ -393,6 +393,15 @@ sign-invariant complete orientation, and cell changes so an in-place turn or a
 same-pose EnvCell crossing cannot leave offset Setup shapes stale.
 The projectile controller retains its separate body/InWorld/shadow edge owner.
 
+During login/portal quiescence, loaded projection residency and gameplay
+visibility are separate. `LiveEntityRuntime` validates spatial ownership
+through `GpuWorldState.IsLiveEntityProjectionResident`, allowing destination
+renderer preparation to converge offscreen. World consumers continue through
+availability-gated `IsLiveEntityVisible`, so drawing, collision, picking,
+radar/status targeting, effects, and audio remain closed until reveal. This
+distinction is part of the Slice E connected gate, not an alternate live-entity
+lifetime.
+
 Remote teleport placement is bounded in `Physics/RemoteTeleportController`,
 not `GameWindow`: it retains at most one pending request per materialized
 incarnation, scopes it by the live generation and accepted PositionSequence,
@@ -453,10 +462,10 @@ useful ordering seam, but its ownership status is **partial**.
 | World environment | **Complete ownership** | `WorldEnvironmentController` solely owns WorldTime, the loaded DAT sky, current day group, Weather, server synchronization, AdminEnvirons bridging, and debug time/weather cycles. `GameWindow` keeps ABI-compatible readonly aliases to the same clock/weather instances and composes one render source plus the two live-session callbacks. TS-54/TS-55 register the remaining centered UI sound and full fog/ambient/radar behavior gaps. |
 | Live identity/lifetime | **Complete App integration** | `LiveEntityRuntime` owns incarnation identity, accepted snapshots/timestamps, runtime components, and logical/spatial lifetime. `LiveEntityHydrationController`, `LiveEntityRuntimeTeardownController`, and `LiveEntityNetworkUpdateController` own DAT-backed hydration, retryable cleanup, and accepted Position/Vector/State/Movement presentation without a second GUID owner (`aa90c646`). |
 | Inbound/object-frame order | **Complete App orchestration** | `UpdateFrameOrchestrator` owns the complete typed host phase graph; `RetailInboundEventDispatcher`, `RetailLiveFrameCoordinator`, `LiveObjectFrameController`, `LiveSpatialPresentationReconciler`, streaming/input/teleport/player-mode/camera owners preserve the accepted order. `GameWindow.OnUpdate` is one profiler-scoped handoff (`e91f3102`). |
-| World reveal | **Complete** | `WorldRevealCoordinator` owns login/portal readiness, generation quiescence, and the exact streaming destination reservation. Login auto-entry and portal completion close only their active generation; stale completion cannot clear its replacement. Delayed portals retain the authored tunnel and centered retail wait notice rather than force-revealing incomplete content. |
+| World reveal | **Complete** | `WorldRevealCoordinator` owns login/portal readiness, generation quiescence, and the exact streaming destination reservation. Login auto-entry and portal completion close only their active generation; stale completion cannot clear its replacement. Delayed portals retain the authored tunnel and centered retail wait notice rather than force-revealing incomplete content. Quiesced destination projections may become spatially resident for renderer preparation while all availability-gated gameplay consumers stay closed. |
 | Retained gameplay UI | **Mostly complete feature ownership** | `RetailUiRuntime` and focused panel/controllers own layout and behavior. `GameWindow.OnLoad` still performs substantial service composition, which is allowed until the final composition cleanup. |
 | Selection/interaction | **Complete** | `WorldSelectionQuery` owns read-only picking/classification/range queries; `SelectionInteractionController` owns selection intent, Use/PickUp transport, exact-incarnation queues, and auto-walk deferral; `ItemInteractionController` owns ItemHolder policy plus the shared retail inventory-request transaction. `GameWindow` retains construction and narrow lifecycle forwarding only. |
-| Landblock presentation | **Complete** | `LandblockBuildFactory` owns the captured-origin DAT transaction; concrete render/physics/DAT-static publishers and `LandblockPresentationPipeline` own publication and exact retryable retirement. `StreamingOriginRecenterCoordinator` serializes old-window retirement with teleport/session origin lifetimes. `GameWindow` retains construction and one pipeline field only (`c79d0a49`, closeout `4a205a3e`). |
+| Landblock presentation | **Complete** | `LandblockBuildFactory` owns the captured-origin DAT transaction; concrete render/physics/DAT-static publishers and `LandblockPresentationPipeline` own typed-meter publication and exact retryable retirement. `StreamingController` owns stable destination/control/unload/Near/Far queues and destination reservation. CPU mesh-cache restaging requires an exact live owner. `StreamingOriginRecenterCoordinator` serializes old-window retirement with teleport/session origin lifetimes. `GameWindow` retains construction and one pipeline field only (`c79d0a49`, closeout `4a205a3e`; Slice E closeout `91e82c3c`). |
 | Render-frame orchestration | **Complete** | `RenderFrameOrchestrator` owns the GPU-flight, resource, world/PView/shared-alpha, private-presentation, diagnostics, screenshot, and recovery graph. `GameWindow.OnRender` takes one logical window-size snapshot and performs one immutable handoff (`9d7df1bf`). |
 | Unified `GameEntity` | **Deferred target** | `LiveEntityRuntime` already supplies the critical canonical owner. Full type aggregation is a separate high-risk migration and is not required to make `GameWindow` thin. |