chore(deps-dev): bump @vitejs/plugin-react from 5.2.0 to 6.0.3 in /ui (#70)

Bumps [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/tree/HEAD/packages/plugin-react) from 5.2.0 to 6.0.3.
- [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@6.0.3/packages/plugin-react)

---
updated-dependencies:
- dependency-name: "@vitejs/plugin-react"
  dependency-version: 6.0.3
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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ui/package.json

@@ -54,7 +54,7 @@
     "@types/node": "^26.0.1",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
-    "@vitejs/plugin-react": "^5.2.0",
+    "@vitejs/plugin-react": "^6.0.3",
     "jsdom": "^27.4.0",
     "prettier": "^3.8.1",
     "prettier-plugin-tailwindcss": "^0.8.0",