Desktop now shows codec badges like Android: - Green TX badge: e.g. "Opus64k" - Blue RX badge: e.g. "Opus24k" Displayed in the stats line below the call controls. Engine tracks tx_codec (set on encoder init) and rx_codec (updated from incoming packet headers). Passed through EngineStatus → CallStatus → frontend. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>