Highcharts sieht viel besser aus

frontend/package.json

@@ -9,11 +9,10 @@
     "preview": "vite preview"
   },
   "dependencies": {
-    "chart.js": "^4.4.1",
-    "chartjs-adapter-date-fns": "^3.0.0",
     "date-fns": "^3.3.1",
+    "highcharts": "^11.4.0",
+    "highcharts-react-official": "^3.2.1",
     "react": "^18.3.1",
-    "react-chartjs-2": "^5.2.0",
     "react-dom": "^18.3.1"
   },
   "devDependencies": {