3 frames showing the dirty indicator UI states:
- NoteList: orange dot before title for modified/added notes
- TabBar: orange dot between title and close button
- StatusBar: "N pending" counter with CircleDot icon
Design decision: used accent-orange (--accent-orange) for the
indicator to differentiate from type-colored icons and provide
a warm "uncommitted changes" signal without being alarming.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
