build(deps): bump react-router and react-router-dom in /frontend

Bumps [react-router](https://github.com/remix-run/react-router/tree/HEAD/packages/react-router) to 7.18.1 and updates ancestor dependency [react-router-dom](https://github.com/remix-run/react-router/tree/HEAD/packages/react-router-dom). These dependencies need to be updated together.


Updates `react-router` from 6.30.4 to 7.18.1
- [Release notes](https://github.com/remix-run/react-router/releases)
- [Changelog](https://github.com/remix-run/react-router/blob/react-router@7.18.1/packages/react-router/CHANGELOG.md)
- [Commits](https://github.com/remix-run/react-router/commits/react-router@7.18.1/packages/react-router)

Updates `react-router-dom` from 6.30.4 to 7.18.1
- [Release notes](https://github.com/remix-run/react-router/releases)
- [Changelog](https://github.com/remix-run/react-router/blob/react-router-dom@7.18.1/packages/react-router-dom/CHANGELOG.md)
- [Commits](https://github.com/remix-run/react-router/commits/react-router-dom@7.18.1/packages/react-router-dom)

---
updated-dependencies:
- dependency-name: react-router
  dependency-version: 7.18.1
  dependency-type: indirect
- dependency-name: react-router-dom
  dependency-version: 7.18.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

frontend/package.json

@@ -16,7 +16,7 @@
     "lucide-react": "^0.454.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
-    "react-router-dom": "^6.28.0"
+    "react-router-dom": "^7.18.1"
   },
   "devDependencies": {
     "@types/react": "^18.3.12",