feat(analytics): add GA4 (G-15XZEQ6G9S), Meta Pixel, Hanzo Analytics, and Hanzo Insights with route-change tracking

Co-authored-by: Hanzo Dev <[email protected]>

apps/docs/app/layout.tsx

@@ -36,6 +36,57 @@ export const viewport: Viewport = {
 export default function RootLayout({ children }: { children: ReactNode }) {
   return (
     <html lang="en" className={`${Zen.variable} ${ZenMono.variable} t_dark`} suppressHydrationWarning>
+      <head>
+        {/* Google Analytics 4 (G-15XZEQ6G9S) */}
+        <script async src="https://www.googletagmanager.com/gtag/js?id=G-15XZEQ6G9S" />
+        <script
+          dangerouslySetInnerHTML={{
+            __html: `
+              window.dataLayer = window.dataLayer || [];
+              function gtag(){dataLayer.push(arguments);}
+              gtag('js', new Date());
+              gtag('config', 'G-15XZEQ6G9S', {
+                linker: {
+                  domains: ['hanzo.ai', 'hanzo.id', 'docs.hanzo.ai', 'hanzo.build', 'platform.hanzo.ai', 'pay.hanzo.ai', 'hanzo.app']
+                }
+              });
+            `,
+          }}
+        />
+        {/* Meta Pixel (1790308611893001) */}
+        <script
+          dangerouslySetInnerHTML={{
+            __html: `
+              !function(f,b,e,v,n,t,s)
+              {if(f.fbq)return;n=f.fbq=function(){n.callMethod?
+              n.callMethod.apply(n,arguments):n.queue.push(arguments)};
+              if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0';
+              n.queue=[];t=b.createElement(e);t.async=!0;
+              t.src=v;s=b.getElementsByTagName(e)[0];
+              s.parentNode.insertBefore(t,s)}(window, document,'script',
+              'https://connect.facebook.net/en_US/fbevents.js');
+              fbq('init', '1790308611893001');
+              fbq('track', 'PageView');
+            `,
+          }}
+        />
+        {/* Hanzo Analytics — first-party privacy-preserving web analytics */}
+        <script
+          defer
+          src="https://analytics.hanzo.ai/script.js"
+          data-website-id="a323a8ae-c811-4061-9626-22caaffc612f"
+        />
+        {/* Hanzo Insights */}
+        <script
+          dangerouslySetInnerHTML={{
+            __html: `
+              !function(t,e){var o,n,p,r;e.__SV||(window.hi=e,e._i=[],e.init=function(i,s,a){function g(t,e){var o=e.split(".");2==o.length&&(t=t[o[0]],e=o[1]),t[e]=function(){t.push([e].concat(Array.prototype.slice.call(arguments,0)))}}(p=t.createElement("script")).type="text/javascript",p.crossOrigin="anonymous",p.async=!0,p.src=s.api_host+"/static/array.js",(r=t.getElementsByTagName("script")[0]).parentNode.insertBefore(p,r);var u=e;for(void 0!==a?u=e[a]=[]:a="hi",u.people=u.people||[],u.toString=function(t){var e="hi";return"hi"!==a&&(e+="."+a),t||(e+=" (stub)"),e},u.people.toString=function(){return u.toString(1)+".people (stub)"},o="init capture captureException identify alias people.set people.set_once set_config register register_once unregister opt_out_capturing has_opted_out_capturing opt_in_capturing reset isFeatureEnabled onFeatureFlags getFeatureFlag getFeatureFlagPayload reloadFeatureFlags group updateEarlyAccessFeatureEnrollment getEarlyAccessFeatures on getActiveMatchingSurveys getSurveys getNextSurveyStep onSessionId setPersonProperties".split(" "),n=0;n<o.length;n++)g(u,o[n]);e._i.push([i,s,a])},e.__SV=1)}(document,window.hi||[]);
+              hi.init('hi_e16a2d5a8033442d87f090b24c606825',{api_host:'https://insights.hanzo.ai',person_profiles:'identified_only'});
+              hi.register({app:'docs',org:'hanzo'});
+            `,
+          }}
+        />
+      </head>
       <body>
         <Analytics product="docs">
           <NextProvider>