chore(meta): update changelog

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -6,6 +6,16 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 
 ## [Unreleased]
 
+### Added
+- Dialogue box UI skeleton (#434, D-061) — bottom screen, max 20% height, ~65% width, NPC speech + max 3 response options, insert-styled colors, WASD walk-away with 300ms fade, no close button, diegetic on InsertOverlay z-layer 6
+- Fog entity visualization (#431, D-059/D-060) — cognitive delay rendering: sonar-style sound pings (3 concentric rings, 1.5s fade), unrecognized grey blobs with 0.8s breathing pulse, D-033 color transition at 50% recognition progress, ±0.5 tile position drift, FogEntities node at z:950
+
+### Changed
+- Client protocol version bumped from 6 to 7 (pending_recognitions decode for cognitive delay)
+- GameState: current_dialogue and pending_recognitions fields wired from ObserverSnapshot v7
+- Scene tree: DialogueBox added to InsertOverlay, FogEntities at z:950 between fog shader and InsertOverlay
+- Test mode: mock dialogue (Kael NPC, 3 options) and mock cognitive delay entity (6-tick recognition cycle)
+
 ### Added
 - Archetype evidence presentation spec (#443, D-065/D-034/D-033) — detective case file vs smuggler notebook design document: item definitions, knowledge graph presentation, contradiction markers, THE FRIEND arc walkthroughs, systems interaction map, authoring guidelines
 - Cognitive delay system (#423, D-060) — CognitiveDelay component buffers perception events before emitting KnowledgeEvents (0.6s base / 0.3s urgent at 10 tps), pending_recognitions in ObserverSnapshot v7 for client fog entity visualization, cancellation on entity LOS exit