Bump react and @types/react in /app

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 19.0.0
- [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/v19.0.0/packages/react)

Updates `@types/react` from 18.3.12 to 19.0.8
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/react)

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

Signed-off-by: dependabot[bot] <[email protected]>

app/package.json

@@ -12,7 +12,7 @@
     "humanize-duration": "^3.32.1",
     "luxon": "^3.5.0",
     "primereact": "^10.9.1",
-    "react": "^18.2.0",
+    "react": "^19.0.0",
     "react-bootstrap": "^2.10.7",
     "react-bootstrap-icons": "^1.11.5",
     "react-dom": "^18.3.1",
@@ -63,7 +63,7 @@
     "@types/jest": "^29.5.14",
     "@types/luxon": "^3.4.2",
     "@types/node": "^22.10.7",
-    "@types/react": "^18.3.12",
+    "@types/react": "^19.0.8",
     "@types/react-bootstrap": "^0.32.37",
     "@types/react-dom": "^18.3.1",
     "@types/react-router": "^5.1.20",