refactor: centralize gold tokens, extract sub-components, clean up unused code

- Replace hardcoded hex colors with gold/gold-light/gold-dark Tailwind tokens
- Extract Schedule into DayCard, ScheduleFilters, MobileSchedule sub-components
- Extract Team into TeamCarousel, TeamMemberInfo sub-components
- Add UI_CONFIG for centralized magic numbers (timings, thresholds)
- Add reusable IconBadge component, simplify Contact section
- Convert Pricing clickable divs to semantic buttons for a11y
- Remove unused SocialLinks, btn-outline, btn-ghost, nav-link CSS classes
- Fix React setState-during-render error in TeamCarousel (deferred update pattern)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/app/globals.css

@@ -46,7 +46,7 @@ body {
 /* ===== Focus ===== */
 
 :focus-visible {
-  @apply outline-2 outline-offset-2 outline-[#c9a96e];
+  @apply outline-2 outline-offset-2 outline-gold;
 }
 
 /* ===== Scrollbar hide utility ===== */