fix(portal): synchronize destination presentation state

docs/plans/2026-05-12-milestones.md

@@ -332,6 +332,37 @@ the Lifestone recall boundary and a MagicPortal casting timeline. The user
 confirmed `/ls` and spell-recall arrivals no longer replay their animation
 tails; additional portal visual polish is explicitly deferred.
 
+**2026-07-16 corrective portal gate (#218).** A side-by-side retail observer
+check found three distinct state-publication defects after the arrival-tail
+fix. Hidden now recomposes the post-`HandleEnterWorld` cyclic pose without
+advancing animation time before its zero-time purple PES hooks run. Portal
+space now waits for both completed static/EnvCell mesh uploads (including the
+texture flush) and collision residency; dense
+outdoor landblocks no longer abort at the obsolete 256-entry procedural
+scenery id boundary (`0x8XXYYIII`, 4,096 entries). Finally, successful indoor
+transitions commit the full resolved EnvCell/frame into the canonical outbound
+Position, preventing stop-time snaps to the dungeon entrance on retail
+observers. GPU-evicted meshes are re-staged from a bounded texture-complete CPU
+cache instead of becoming false-ready or permanently absent. Portal readiness
+also requires Near-tier ownership throughout the ring; stale worker completions
+carry a hard-recenter generation and cannot overwrite a newer tier/window, and
+a first Near completion demoted in flight is published as its equivalent
+terrain-only Far payload rather than dropped. Upload completion is separate
+from logical mesh ownership; landblock/static/EnvCell pins now balance across
+unload and zero-owner late uploads remain evictable. A self-contained promotion
+that supersedes a queued Far load publishes directly as a real Near landblock;
+there is no provisional transaction waiting indefinitely for a base that the
+streamer intentionally cancelled. Near-to-Far now has an explicit cross-layer
+demotion transaction that preserves terrain while retiring EnvCells, indoor
+physics/buildings, static collision, lights, translucency state, entities, and
+render pins. Cross-landblock static shadow footprints are removed by logical
+owner while dynamic registrations remain refloodable; duplicate Near
+completions are publication-idempotent. Full unload shares the static-owner
+teardown, and surviving adjacent owners remember withdrawn prefixes so their
+cross-seam rows return when a landblock is promoted again.
+Automated gates are green; the connected single-/two-client visual gate is
+pending.
+
 ---
 
 #### (historical M1.5 working notes below)