fix Analyse

backend/analytics-db.js

@@ -13,7 +13,11 @@ function loadDB() {
 }
 
 function saveDB(data) {
-  writeFileSync(DB_FILE, JSON.stringify(data, null, 2));
+  try {
+    writeFileSync(DB_FILE, JSON.stringify(data, null, 2));
+  } catch (e) {
+    console.error('Analytics DB Schreibfehler:', e.message);
+  }
 }
 
 let db = loadDB();