The yjs-update broadcast listener was added after the Supabase channel
was already subscribed, which meant it never received messages. Moved
the listener registration to the builder chain before .subscribe()
(matching how cursor/node-lock listeners work), and removed the broken
isRemoteUpdateRef guard that caused ReferenceErrors preventing local
changes from reaching the CRDT.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
The Yjs map observers were calling notifyNodesChange/notifyEdgesChange
for local changes, creating a feedback loop that reset React Flow state
mid-drag. Remote notifications are already handled by the connectChannel
handler, so the observers only need to schedule persistence.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Gustavo Henrique Santos Souza de Miranda