chore(meta): update changelog

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

CHANGELOG.md

@@ -6,6 +6,20 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 
 ## [Unreleased]
 
+### Added
+- AudioManager autoload (#255, D-068/D-069/D-073) — 5-bus architecture (Music, Ambient, WorldSFX, PlayerActions, UISounds), directory-scan asset registry, spatial/non-spatial playback, audio dip profiles (dialogue, confrontation, listening_focus) with low-pass filter sweep, zone crossfade stub
+- Dialogue response selection (#435, D-061/D-062) — structured options with response_id, priority sorting, max 3 visible, invisible locked options, RichTextLabel for BBCode support
+- Walk-away mechanic (#437, D-064) — WASD triggers WalkAway input during dialogue, 300ms fade, dialogue_active flag gates movement, re-show on server interrupt
+- Confrontation text styling (#436, D-063) — italic first-person options, 1.5s monologue beat with dialogue dim to 70%, audio dip via AudioManager, walk-away cancels in-flight beat
+- MessagePack boundary value tests (#470) — 41 values (25 positive, 16 negative), encode-only header verification, roundtrip, Rust-style unsigned decode overlap tests
+- Client P0 regression tests (#477) — monologue carry-forward (Bug #5), camera stability during pause (Bug #2)
+- Client P1 tests (#478) — fog shader state (4), entity lifecycle (2), pending recognition blob (1)
+
+### Changed
+- Fog byte magic numbers replaced with named constants (#476) — VIS_HIDDEN/PERIPHERAL/FORWARD, EXP_UNEXPLORED/EXPLORED/VISIBLE in FogState
+- Dialogue options now carry structured {text, response_id, priority, confrontation} instead of plain strings
+- Protocol v7 dialogue decode validates and skips malformed options
+
 ### Added
 - QA test architecture workshop complete — 3-round, 7-agent workshop producing 60 tickets (epic #455): Gauntlet test world (7 rooms, 48 entities), test client binary (tooling/test-client/), determinism fixes, content validation, make pre-pr pipeline, 38 client tests, anti-tedium features, human tester workflow
 - Workshop skill updated — agents now write output files to disk instead of sending messages, fixing documenter access