fc6c9648f9
VadHandler is now the sole mic owner — removed separate AudioRecorder that caused audio focus contention on Android. Audio from onSpeechEnd is encoded as WAV for Whisper. Provider switched to autoDispose to match widget lifecycle, preventing defunct element assertions. Recording UI deferred until mic is open. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>