Session was stored as { claims: { username, sub } } but getSessionInfo()
read sess.username (top-level) instead of sess.claims.username — always
falling back to "Anonymous". Fixed in all 3 locations: folk-notes-app,
comment-panel, collab-presence.
Also fixed awareness race: Yjs provider broadcast initial awareness before
user field was set, creating a ghost "anonymous" peer. Now identity is set
on awareness before provider connects, and the duplicate set is removed.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>