One lever, every surface. The renderer toggle persists locally and mirrors
into display.message_reactions; the backend gates the agent's
react_to_message tool (check_fn) and the model-context annotation on the same
key, and the ':' composer trigger reads the store at detection time. Off
means off everywhere: no ☺ slot, no right-click picker, no :shortcode:
popover, no agent reactions, and the model hears nothing — while reactions
already persisted keep rendering so history doesn't lose data. Also fixes the
import-order lint error CI flagged in composer/index.tsx.
Brooklyn Nicholson
fec1ac0a7a