chat-state-check.py: polls each node Chromium via CDP, captures main
chat + up to 5 side chats (last 10 DOM-visible messages each, 500
chars). Structural React selectors; picks the most common non-empty
list across repeated renders.
chat-state-report.py: signs and POSTs the report to the board
/api/box/chat-state/report ingest (namespace health, 5-min timer).
Session: sidechat/box-console
operator-main