Export filenames were derived from only the first 30 characters of the
generation text. Generations with similar wording (a common workflow when
iterating on the same line) produced identical filenames, so exports
collided on disk — the browser appended " (1)"/" (2)" and users ended up
opening audio that didn't match the expected filename.
Append the first 8 chars of the generation id to the .wav and .voicebox.zip
export filenames, in both the backend Content-Disposition headers and the
frontend save-file hooks.
Co-authored-by: Claude Opus 4.8 <[email protected]>
The /transcribe endpoint passed the raw uploaded file straight to the STT
backend (mlx_audio.stt -> miniaudio), which only decodes WAV/FLAC/MP3/Vorbis.
Browser recordings arrive as WebM/Opus (Chrome/Firefox MediaRecorder), so
web-mode dictation failed with 500 "unsupported file format". The Tauri app
was unaffected because WebKit produces MP4.
librosa already fully decodes the upload to compute duration (falling back to
audioread/ffmpeg for exotic containers), so re-encode that PCM to a temp WAV
and hand it to Whisper. WAV inputs pass through unchanged; the temp file is
cleaned up in the finally block.
Co-authored-by: Claude Opus 4.8 <[email protected]>
