BE-044: PUT /sessions/{id}/end — complete session

Track: 1 — MVP
Section: 1.12 Live Session Lifecycle
Status: [ ] Todo
Repo: backend-api
Branch: feature/BE-044-end-session

Done When

Status "live" → "ended". ended_at set. All participants get left_at = now. Duration calculated. Ending non-live session returns 409

Notes

No notes yet.