Add Umami analytics and broaden beta copy for Android.

Optional NEXT_PUBLIC_UMAMI_* env vars load tracking when set; marketing pages now mention iOS TestFlight and Google Play internal testing.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/components/umami-analytics.tsx

@@ -0,0 +1,25 @@
+import Script from "next/script";
+
+import { env } from "~/env";
+
+const DEFAULT_UMAMI_SCRIPT_URL = "https://cloud.umami.is/script.js";
+
+/**
+ * Privacy-friendly page analytics via Umami. Enabled when
+ * `NEXT_PUBLIC_UMAMI_WEBSITE_ID` is set in `.env`.
+ */
+export function UmamiAnalytics() {
+  const websiteId = env.NEXT_PUBLIC_UMAMI_WEBSITE_ID;
+  if (!websiteId) return null;
+
+  const src = env.NEXT_PUBLIC_UMAMI_SCRIPT_URL ?? DEFAULT_UMAMI_SCRIPT_URL;
+
+  return (
+    <Script
+      defer
+      src={src}
+      data-website-id={websiteId}
+      strategy="afterInteractive"
+    />
+  );
+}