The green dot (new note indicator) was disappearing after Cmd+S because
markSaved cleared it from the in-memory newPaths set. Now resolveNoteStatus
derives "new" status from git status (untracked/added files) so the green
dot persists until the note is committed. The in-memory tracker is only
used for the brief window between note creation and first save to disk.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>