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/components/ui/IconBadge.tsx

@@ -0,0 +1,14 @@
+interface IconBadgeProps {
+  children: React.ReactNode;
+  className?: string;
+}
+
+export function IconBadge({ children, className = "" }: IconBadgeProps) {
+  return (
+    <div
+      className={`flex h-10 w-10 shrink-0 items-center justify-center rounded-xl bg-gold/10 text-gold-dark transition-colors group-hover:bg-gold/15 dark:text-gold-light ${className}`}
+    >
+      {children}
+    </div>
+  );
+}