chore(meta): update changelog for sprint 9 client work

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

CHANGELOG.md

@@ -10,6 +10,11 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 - review-pr skill: explicit verdict rules — critical/warning → REQUEST_CHANGES, suggestion-only → APPROVE
 
 ### Added
+- Gauntlet room timer + personal bests (#496) — GauntletHUD shows TIMER: MM:SS (PB: MM:SS), starts on room entry, resets on room change, persists stats to user://gauntlet-stats.json, session summary on disconnect, hidden in non-gauntlet mode
+- WRONG button F12 MVP (#495) — bug report capture: pause sim, show modal prompt, save snapshot.json + render.txt + description.txt to user://bug-reports/, Esc to cancel
+- GameState.room_id and gauntlet_mode fields — parsed from ObserverSnapshot, enabling gauntlet UI
+- BUG_REPORT action in InputMapper (F12 binding) with SimBridge wire guard (client-only)
+- 24 new anti-tedium tests — GauntletHUD lifecycle (16: timer, PB, visibility, room change, session tracking) + BugReportDialog (8: pause/unpause, wire guard, text render, edge cases)
 - whatsinagame starter kit — reusable multi-agent team bootstrap for any project (3-tier profiles, 18 skills, 16 agent archetypes, stakeholder personas, ticketing DB, decision tracking)
 - Domain-action naming convention for skills documented in create-skill guide
 - `gauntlet` feature flag (default-on) — allows stripping Gauntlet test world from release builds with `--no-default-features`