Voeg self-hosted Umami analytics + UptimeRobot uptime dashboard toe

Co-authored-by: Junie <junie@jetbrains.com>

src/components/UmamiAnalytics.tsx

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+import { useEffect } from 'react';
+
+const SCRIPT_ELEMENT_ID = 'umami-analytics-script';
+
+/**
+ * Injects the self-hosted Umami tracking script (see
+ * aidlc-docs/features/react-frontend/operations/monitoring/umami-setup.md) when both
+ * VITE_UMAMI_SCRIPT_URL and VITE_UMAMI_WEBSITE_ID are configured at build time.
+ *
+ * Silently does nothing if either variable is missing (e.g. local development, or a
+ * build for which the Umami instance/website has not been set up yet) — safe default,
+ * no crash on missing config, mirroring the existing Sentry DSN pattern.
+ *
+ * Skipped during local development (`pnpm dev`) by default so local testing does not
+ * pollute production/test visitor analytics.
+ */
+export function UmamiAnalytics() {
+  useEffect(() => {
+    const scriptUrl = import.meta.env.VITE_UMAMI_SCRIPT_URL;
+    const websiteId = import.meta.env.VITE_UMAMI_WEBSITE_ID;
+
+    if (import.meta.env.DEV || !scriptUrl || !websiteId) {
+      return;
+    }
+
+    if (document.getElementById(SCRIPT_ELEMENT_ID)) {
+      return;
+    }
+
+    const script = document.createElement('script');
+    script.id = SCRIPT_ELEMENT_ID;
+    script.src = scriptUrl;
+    script.defer = true;
+    script.setAttribute('data-website-id', websiteId);
+    document.head.appendChild(script);
+
+    return () => {
+      document.getElementById(SCRIPT_ELEMENT_ID)?.remove();
+    };
+  }, []);
+
+  return null;
+}