fix(portal): synchronize destination presentation state

src/AcDream.App/Rendering/Wb/EntityClassificationCache.cs

@@ -11,12 +11,11 @@ namespace AcDream.App.Rendering.Wb;
 /// <para>
 /// <b>Key composition:</b> entries are keyed by the tuple
 /// <c>(EntityId, LandblockHint)</c>, NOT by <c>EntityId</c> alone. Issue #53
-/// uncovered that <c>entity.Id</c> is NOT globally unique across all
-/// static-entity hydration paths: scenery (<c>0x80XXYY00 + localIndex</c>)
-/// and interior cells (<c>0x40XXYY00 + localCounter</c>, X-byte fixed
-/// 2026-06-11 — it used to be discarded entirely, #119) overflow at >256
-/// items per landblock, wrapping into the <c>lbY</c> byte and producing
-/// cross-LB collisions in dense forest/urban LBs outside Holtburg. Keying
+/// uncovered that older hydration IDs were not globally unique across all
+/// static-entity paths: their former byte-aligned counters overflowed at
+/// more than 256 items per landblock and wrapped into the <c>lbY</c> byte.
+/// The current <c>0x8XXYYIII</c> scenery and <c>0x4XXYYIII</c> interior
+/// allocators reserve 12-bit counters and fail before aliasing. Keying
 /// by the tuple is correct-by-construction ONLY when the hint identifies the
 /// entity's OWNING landblock — callers must derive it via
 /// <c>WbDrawDispatcher.ResolveCacheLandblockHint</c> (the entity's
@@ -64,8 +63,8 @@ internal sealed class EntityClassificationCache
     /// <summary>
     /// Look up an entity's cached classification. Keyed by both
     /// <paramref name="entityId"/> AND <paramref name="landblockHint"/> to
-    /// disambiguate entities whose Ids collide across landblocks (e.g.,
-    /// scenery's <c>0x80LLBB00 + localIndex</c> overflow at >256 items/LB).
+    /// preserve defensive isolation if a future hydration path introduces an
+    /// entity-id collision across landblocks.
     /// Returns <c>true</c> with the entry on hit; <c>false</c> with
     /// <paramref name="entry"/> set to <c>null</c> on miss.
     /// </summary>