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/TrackedButton.tsx

@@ -0,0 +1,34 @@
+'use client';
+
+import React from 'react';
+import { Button, ButtonProps } from '../ui/Button';
+import { useAnalytics } from './useAnalytics';
+import { AnalyticsEvents } from './analytics-events';
+
+interface TrackedButtonProps extends ButtonProps {
+  eventName?: string;
+  eventProperties?: Record<string, any>;
+}
+
+/**
+ * A wrapper around the project's Button component that tracks click events.
+ * Safe to use in server components.
+ */
+export default function TrackedButton({
+  eventName = AnalyticsEvents.BUTTON_CLICK,
+  eventProperties = {},
+  onClick,
+  ...props
+}: TrackedButtonProps) {
+  const { trackEvent } = useAnalytics();
+
+  const handleClick = (e: React.MouseEvent<HTMLButtonElement>) => {
+    trackEvent(eventName, {
+      ...eventProperties,
+      label: typeof props.children === 'string' ? props.children : eventProperties.label,
+    });
+    if (onClick) onClick(e);
+  };
+
+  return <Button {...props} onClick={handleClick} />;
+}