Both advisors (Opus MUST-FIX + Codex SHIP-ONLY-WITH-FIXES) caught that the Edge
TTS playback was broken despite the settings selector working:
1. ui.js _playEdgeTts used new Audio('/api/tts?text=...') — a GET — but /api/tts
is POST-only (405) and registered only in handle_post. The per-message speaker
button + auto-read silently failed in edge mode, and the GET leaked message
text into the query string/access log. Rewritten to POST JSON + blob object
URL (mirrors the working boot.js path), and now surfaces server errors
(503 not-installed, 429 rate-limit) via toast instead of silent dead air.
2. boot.js hands-free Edge audio was a local var never assigned to the shared
_playingEdgeAudio handle, so stopTTS() (from _deactivate) couldn't stop it.
Now registered + cleared on end/error.
3. Test isolation: the _tts_limiter function-attribute singleton persisted across
the whole suite, flaking 2 of my endpoint tests in the full run. Converted the
reset to an autouse fixture (before+after each) + unique per-test client IPs.