feat(analytics): implement total transparency suite and SEO metadata standardization

- Added global ScrollDepthTracker (25%, 50%, 75%, 100%)
- Implemented ProductEngagementTracker for deep product analytics
- Added field-level tracking to ContactForm and RequestQuoteForm
- Standardized SEO metadata (canonical, alternates, x-default) across all routes
- Created reusable TrackedLink and TrackedButton components for server components
- Fixed 'useAnalytics' hook error in Footer.tsx by adding 'use client'

components/analytics/TrackedLink.tsx

@@ -0,0 +1,44 @@
+'use client';
+
+import React from 'react';
+import Link from 'next/link';
+import { useAnalytics } from './useAnalytics';
+import { AnalyticsEvents } from './analytics-events';
+
+interface TrackedLinkProps {
+  href: string;
+  eventName?: string;
+  eventProperties?: Record<string, any>;
+  className?: string;
+  children: React.ReactNode;
+  onClick?: () => void;
+}
+
+/**
+ * A wrapper around next/link that tracks the click event.
+ * Useful for adding tracking to server components.
+ */
+export default function TrackedLink({
+  href,
+  eventName = AnalyticsEvents.LINK_CLICK,
+  eventProperties = {},
+  className,
+  children,
+  onClick,
+}: TrackedLinkProps) {
+  const { trackEvent } = useAnalytics();
+
+  const handleClick = (e: React.MouseEvent) => {
+    trackEvent(eventName, {
+      href,
+      ...eventProperties,
+    });
+    if (onClick) onClick();
+  };
+
+  return (
+    <Link href={href} className={className} onClick={handleClick}>
+      {children}
+    </Link>
+  );
+}