Live portal: Go Live — browser window capture published over WHIP as <user>/HelmetCam-<date>; dumpd /me/stream-key

Go Live closes viewer windows, fetches the Authentik-identified user's MediaMTX key from dumpd
(/etc/vanguard/streamers.json written by configure.py), opens Chrome's window-only picker with
audio, prefers H.264 so MediaMTX can record, caps at 12 Mbps / 1440p60, shows live stats, Stop.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

CommunityDiscordMedia.md

@@ -198,6 +198,7 @@ Checklist:
 - [ ] dock: `Dump tonight` sends no credentials; session cookie carries identity
 
 ### Phase 7 — dock polish + cleanup
+(partly done: dumpd `/me/stream-key` exists and the live portal's Go Live uses it; the OBS dock still holds its own copy of the key)
 - [ ] `dumpd.py` gains `GET /me` → `{user, groups, stream_key}` for the logged-in streamer;
       dock fills OBS settings from it — nobody types a stream password again
 - [ ] `configure.py` shrinks: hostnames + streamers only (editors and admin live in Authentik)