When the admin runs "Recalculate Floors" on the bracket page, the league
sports-season homepage was showing stale elimination data because there was
no mechanism to notify it of the change.
Fix: after recalculate-floors updates participant_results, emit a
standings-updated socket event to all fantasy-season draft rooms linked to
the sports season. The sports-season page now joins its draft room and
revalidates its loader whenever it receives that event for the matching
sports season.
https://claude.ai/code/session_01D3NbnVQdaH82Fk7Jm8y3sB
90a4039cba