Deployed to el3ab-player and verified end to end against production with
tests/rehearsal.mjs, which now also covers spectating and the "watch this player"
lookup. Production is left byte-for-byte as it was found: row counts across
matches, tournaments, profiles, rating_history and the queue are unchanged.

Remaining for a human: play one game on a real device (the interface changes are
the part I could not verify), and optionally set CRON_SECRET and
SUPABASE_JWT_SECRET, which need CapRover app configuration the push webhook does
not grant.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>