chore(meta): update changelog

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

CHANGELOG.md

@@ -7,6 +7,8 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 ## [Unreleased]
 
 ### Added
+- UIStrings autoload with YAML-based UI string loading (#409) — 38 strings across 5 categories (interaction, hud, knowledge, relationship, tutorial), minimal YAML parser, `get_text()` lookup with fallback-to-key
+- HUD and interaction prompt labels now loaded from `client/data/ui-strings.yaml` instead of hardcoded strings
 - Hoshe QA briefing updated with integration test coverage priorities — test harnesses, dedicated client-server test map, edge case focus
 - Sprint 5 "Live" team briefings — copy (6 tickets), client (2), CI (1), joint coordination for content-at-scale sprint targeting FRIEND packs, voice patterns, NPC style guide, PC-as-NPC authoring, UI microcopy, FactId validation
 - Live server mode (`make game`) — single command builds server, launches client with TCP connection, auto-kills server on exit; `make stop` helper for manual cleanup