first pass analytics redo

src/routes/+layout.svelte

@@ -6,6 +6,7 @@
 	import favicon from "$lib/assets/favicon.ico";
 	import TitleAnimation from "$lib/components/TitleAnimation.svelte";
 	import ThemeToggle from "$lib/components/ThemeToggle.svelte";
+	import { captureFirstVisit } from "$lib/utils/analytics";
 
 	let isDev = $state(false);
 
@@ -14,6 +15,9 @@
 			window.location.host === "localhost:5173" ||
 			window.location.host === "test.bibdle.com";
 
+		// Instrumentation E: capture first-touch referrer / UTM once per browser.
+		captureFirstVisit();
+
 		// Inject analytics script
 		const script = document.createElement("script");
 		script.defer = true;