WAV/MP3 format toggle, rolling debug log, auto-open debug on error

[Copilot]

Two UX/DX gaps addressed: no way to choose output format from the UI, and the debug console wiped logs on each job making post-mortem debugging impossible.

Output format toggle (WAV / MP3)

• MP3 is now the default — native binary output, no --wav flag passed to dit-vae
• WAV adds --wav flag explicitly; FLAC support removed entirely (never existed upstream)
• audioFormat: 'wav' | 'mp3' propagated through types.ts, services/api.ts, and RunParams in acestep.ts
• Spawn mode: straightforward branch — wantWav ? ditArgs.push('--wav') : (nothing); file collection glob matches .mp3 or .wav accordingly; all ffmpeg conversion code removed
• Advanced panel → Output section: MP3/WAV two-button toggle (MP3 selected by default, orange; WAV sky-blue)

Format badge in song catalog

• SongList derives format from song.audioUrl extension and renders a colour-coded badge (MP3 orange, WAV sky-blue) alongside the model badge

Rolling debug log

• Module-level rollingLog[] and offsetByJob Map live outside the React component, surviving remounts for the full tab session
• All jobs are polled concurrently; each job's lines are appended to a single combined log prefixed with === Job {id} [time] — STATUS === headers
• "Clear" wipes both display and the module-level store; job selector scrolls to that job's section via data-job span attributes

Auto-open debug on job failure

} else if (status.status === 'failed') {
  cleanupJob(jobId, tempId);
  showToast(...);
  setCurrentView('debug');
  window.history.pushState({}, '', '/debug');
}

When polling detects a failed job, the UI immediately navigates to /debug so the full log is visible without manual intervention.

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.