feat: Add key backup reminder. Refactor Toast component to handle dark mode better

package.json

@@ -49,6 +49,7 @@
     "cmdk": "^1.0.0",
     "crypto-random-string": "^5.0.0",
     "immer": "^10.1.1",
+    "js-cookie": "^3.0.5",
     "lucide-react": "^0.363.0",
     "mapbox-gl": "^3.6.0",
     "maplibre-gl": "4.1.2",
@@ -70,6 +71,7 @@
     "@rsbuild/core": "^1.0.10",
     "@rsbuild/plugin-react": "^1.0.3",
     "@types/chrome": "^0.0.263",
+    "@types/js-cookie": "^3.0.6",
     "@types/node": "^20.14.9",
     "@types/react": "^18.3.3",
     "@types/react-dom": "^18.3.0",