The audio endpoint was serving the extracted WAV (16kHz mono PCM)
which balloons to ~1GB for a 3-hour session. Browsers cannot seek
efficiently in such a large uncompressed file.
Now the endpoint serves the original uploaded file (m4a, mp3, opus, etc.)
— a compressed format the browser can seek via byte-range requests.
Falls back to the WAV if the original is missing.
- Campaigns: new table, CRUD API, React context + provider
- Sessions: scoped to campaigns, paths under campaigns/{id}/
- File browser: scoped per campaign, removed copy/paste/autoPlay
- Sidebar: campaign selector dropdown at top
- Transcribe: GPU model cached/released via job counter
- Jobs: status text updates dynamically in real-time
- Auto-redirect: blocked when summarize job is active
