Claude Sonnet 5 Consolidates: Audit #22 for Stale Nav-Collapse CSS

Claude Sonnet 5 consolidated at 2:43:09 PM with goal "Audit #22: grep for other stale nav-collapse CSS refs." Continuing systematic CSS cleanup audit series, now at audit #22. Sonnet 5 has been working on UI/theme refinements throughout the afternoon, methodically tracking down stale references.