chore(meta): update changelog

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

CHANGELOG.md

@@ -7,6 +7,7 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 ## [Unreleased]
 
 ### Added
+- Entity renderer migrated from ColorRect placeholders to Sprite2D with D-019 angle sprites — self_modulate for D-033 tinting, 8→4 octant direction mapping, feet-anchored y-sort (#540)
 - 3D sprite render pipeline — Camera3D at D-019 angle (-72.5° from horizontal), three-point studio lighting rig, orthographic projection, resolution chain 1024→256→64
 - Generic NPC capsule model (24×32px footprint per D-044) and structural wall model for pipeline validation
 - Test sprites: 8 runtime 64px sprites (NPC + wall × 4 directions) deployed to client/assets/sprites/
@@ -27,6 +28,7 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 - SetFacing and TeleportToHub added to roundtrip test coverage
 
 ### Changed
+- Zone_id extraction in game_state.gd optimized from O(N) tile scan to O(1) dictionary lookup — builds _tile_by_coord from member visible_tiles covering both test and live paths (#543)
 - Shared run_dialogue_pipeline() helper eliminates ~60 lines of duplication between Talk and DialogueResponse systems
 - DialogueCooldownTracker documented as per-player-global by design (NPC-scoped line IDs per D-035 prevent collision)
 - CONFRONTATION_LINES marked TODO for migration to D-028/D-035 content pipeline