- TTS /tts/asr: convert non-WAV (AAC/MP3) to WAV before whisper transcription
- share.vue: only create share record if no cached shareCode exists
(prevents duplicate share records on every page load)
- Change recorder format from mp3 (8kHz) to aac (22kHz) for better
whisper ASR accuracy
- Move recorder.onStop binding before recorder.stop() to prevent
race condition (onStop may fire before handler is registered)
- Backend: add Logger, log ASR errors instead of silent catch {}
- Backend: change default extension from .mp3 to .aac
yuzhiran