Build a members lookup and enrich reaction groups with reactor info; introduce a ReactionPill component that shows a tabbed popover listing who reacted (with ability to remove your own reaction). Move reaction button into the new component and adapt styling/UX.
Fix WebSocket handling in useChatSocket by adding a mounted guard to avoid handling events from torn-down sockets (addresses React StrictMode double-invoke issues) and avoid setting state after unmount.
Prevent duplicate local reaction entries in ChatRoomPage by skipping "added" events when the same user/emoji reaction already exists.
Brunobrno
c0af4c2349