chore(deps)(deps): bump react-router in /frontend/app

Bumps [react-router](https://github.com/remix-run/react-router/tree/HEAD/packages/react-router) from 7.13.2 to 7.14.0.
- [Release notes](https://github.com/remix-run/react-router/releases)
- [Changelog](https://github.com/remix-run/react-router/blob/main/packages/react-router/CHANGELOG.md)
- [Commits](https://github.com/remix-run/react-router/commits/react-router@7.14.0/packages/react-router)

---
updated-dependencies:
- dependency-name: react-router
  dependency-version: 7.14.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

frontend/app/package.json

@@ -55,7 +55,7 @@
     "react-dom": "^19.2.4",
     "react-hook-form": "^7.72.0",
     "react-resizable-panels": "^4.8.0",
-    "react-router": "^7.13.2",
+    "react-router": "^7.14.0",
     "recharts": "^3.8.1",
     "sonner": "^2.0.7",
     "tailwind-merge": "^3.5.0",