Posthog integration

instrumentation-client.js

@@ -0,0 +1,24 @@
+// instrumentation-client.js
+import posthog from "posthog-js";
+
+// envs lesen
+const key = process.env.NEXT_PUBLIC_POSTHOG_KEY;
+const host = process.env.NEXT_PUBLIC_POSTHOG_HOST || "https://us.i.posthog.com";
+
+// nur im Browser initialisieren + Doppel-Init verhindern
+if (typeof window !== "undefined" && !window.__posthogInitialized) {
+  if (key) {
+    posthog.init(key, {
+      api_host: host,
+      capture_pageview: false, // Pageviews trackst du selbst
+      loaded: () => {
+        if (process.env.NODE_ENV === "development") posthog.debug();
+      },
+    });
+    window.__posthogInitialized = true;
+  } else {
+    console.warn("NEXT_PUBLIC_POSTHOG_KEY ist nicht gesetzt");
+  }
+}
+
+export default posthog;