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/types/index.ts

@@ -1,2 +1,2 @@
 export type { NavLink } from "./navigation";
-export type { ClassItem, TeamMember, FAQItem, PricingItem, ContactInfo, SiteContent } from "./content";
+export type { ClassItem, TeamMember, FAQItem, PricingItem, ContactInfo, SiteContent, ScheduleClass, ScheduleDay, ScheduleLocation } from "./content";