History panel: lazy doc acquisition from CommunitySync/offline runtime
on open + listen for community-sync-ready event for late connections.
Space settings: reposition panel after every re-render (async data loads
were destroying inline positioning styles), clamp max-height to viewport,
fix wrong global name (__rspaceCommunitySync → __communitySync).
Comment bell: render DOM once, update badge without innerHTML churn,
listen for community-sync-ready event, cache sync reference.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Move the "Leave Comment" button from the bottom canvas toolbar to the
top header bar as <rstack-comment-bell>, positioned left of the
notification bell. Shows a red badge with unresolved comment pin count.
Wires canvas via comment-pin-activate/comment-pins-changed custom events.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Jeff Emmett