chore(deps): bump react from 19.2.0 to 19.2.1 in /client

Bumps [react](https://github.com/facebook/react/tree/HEAD/packages/react) from 19.2.0 to 19.2.1.
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/v19.2.1/packages/react)

---
updated-dependencies:
- dependency-name: react
  dependency-version: 19.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

client/package.json

@@ -18,7 +18,7 @@
     "i18next": "^25.7.1",
     "i18next-browser-languagedetector": "^8.2.0",
     "i18next-http-backend": "^3.0.2",
-    "react": "^19.1.1",
+    "react": "^19.2.1",
     "react-chartjs-2": "^5.3.1",
     "react-dom": "^19.2.0",
     "react-i18next": "^16.3.5",