added luxon

Author: sterlp

ui/package-lock.json

@@ -15,6 +15,7 @@
     "axios": "^1.7.9",
     "bootstrap": "^5.3.3",
     "crossroad": "^1.3.3",
+    "luxon": "^3.5.0",
     "react": "^19.0.0",
     "react-bootstrap": "^2.10.7",
     "react-bootstrap-icons": "^1.11.5",
@@ -25,6 +26,7 @@
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.1.0",
     "@testing-library/user-event": "^14.5.2",
+    "@types/luxon": "^3.4.2",
     "@types/node": "^22.10.2",
     "@types/react": "^19.0.2",
     "@types/react-dom": "^19.0.2",