Replace <button> with <span role="button"> for the unread dot to eliminate browser UA button styles (min-height, padding) that caused unread rows to be taller despite explicit h-4 constraint. Also reduce dot from h-2.5/w-2.5 to h-2/w-2 for a more subtle indicator. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>