graphs: switch to time type graphs

the default one is bound on data. when data is not available, it appears
buggy. it's better to show no data and always show the correct time line
in the x-axis

dashboard/package.json

@@ -20,11 +20,13 @@
     "async": "^3.2.6",
     "bootstrap-sass": "^3.4.3",
     "chart.js": "^4.4.9",
+    "chartjs-adapter-moment": "^1.0.1",
     "eslint": "^9.27.0",
     "eslint-plugin-vue": "^10.1.0",
     "filesize": "^10.1.6",
     "jquery": "^3.7.1",
     "marked": "^15.0.12",
+    "moment": "^2.30.1",
     "moment-timezone": "^0.5.48",
     "pankow": "^3.0.8",
     "sass": "^1.89.0",