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/Button.tsx

@@ -2,7 +2,6 @@ import Link from "next/link";
 
 interface ButtonProps {
   href?: string;
-  variant?: "primary" | "outline" | "ghost";
   size?: "sm" | "md" | "lg";
   children: React.ReactNode;
   className?: string;
@@ -17,13 +16,12 @@ const sizes = {
 
 export function Button({
   href,
-  variant = "primary",
   size = "md",
   children,
   className = "",
   onClick,
 }: ButtonProps) {
-  const classes = `btn-${variant} ${sizes[size]} ${className}`;
+  const classes = `btn-primary ${sizes[size]} ${className}`;
 
   if (href) {
     return (