fix(analytics): update analytics tracking condition to use ENABLE_ANALYTICS env var

Author: Marvin Zhang

packages/ui/src/app/layout.tsx

@@ -69,8 +69,8 @@ export default async function RootLayout({
             <Toast />
           </ProjectProvider>
         </ThemeProvider>
-        {/* Only track analytics on web.lean-spec.dev, not for other users */}
-        {process.env.NEXT_PUBLIC_VERCEL_URL?.includes('lean-spec.dev') && <Analytics />}
+        {/* Analytics enabled via ENABLE_ANALYTICS env var in Vercel */}
+        {process.env.ENABLE_ANALYTICS === 'true' && <Analytics />}
       </body>
     </html>
   );