build(deps-dev): bump @vitejs/plugin-react from 5.1.4 to 6.0.1

Bumps [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/tree/HEAD/packages/plugin-react) from 5.1.4 to 6.0.1.
- [Release notes](https://github.com/vitejs/vite-plugin-react/releases)
- [Changelog](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react/CHANGELOG.md)
- [Commits](https://github.com/vitejs/vite-plugin-react/commits/plugin-react@6.0.1/packages/plugin-react)

---
updated-dependencies:
- dependency-name: "@vitejs/plugin-react"
  dependency-version: 6.0.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

client/package.json

@@ -28,7 +28,7 @@
     "@types/leaflet": "^1.9.21",
     "@types/react": "^18.3.28",
     "@types/react-dom": "^18.3.7",
-    "@vitejs/plugin-react": "^5.1.4",
+    "@vitejs/plugin-react": "^6.0.1",
     "tailwindcss": "^4.2.1",
     "typescript": "^5.7.2",
     "vite": "^7.3.1"