chore(deps): bump react and @types/react in /frontend

Bumps [react](https://github.com/facebook/react/tree/HEAD/packages/react) and [@types/react](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/react). These dependencies needed to be updated together.

Updates `react` from 18.3.1 to 19.2.6
- [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/v19.2.6/packages/react)

Updates `@types/react` from 18.3.28 to 19.2.14
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/react)

---
updated-dependencies:
- dependency-name: "@types/react"
  dependency-version: 19.2.14
  dependency-type: direct:development
  update-type: version-update:semver-major
- dependency-name: react
  dependency-version: 19.2.5
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

frontend/package.json

@@ -21,7 +21,7 @@
     "date-fns": "^3.2.0",
     "leaflet": "^1.9.4",
     "lucide-react": "^0.309.0",
-    "react": "^18.2.0",
+    "react": "^19.2.6",
     "react-dom": "^18.2.0",
     "react-router-dom": "^6.21.1",
     "recharts": "^2.10.3",
@@ -31,7 +31,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.39.4",
-    "@types/react": "^18.2.48",
+    "@types/react": "^19.2.14",
     "@types/react-dom": "^18.2.18",
     "@vitejs/plugin-react": "^4.2.1",
     "autoprefixer": "^10.4.17",