fix: upgrade react@19.2.1

[cristiandouce]

This pull request updates the react dependency to the latest patch version in the package.json file. This is a minor update that ensures compatibility with the most recent bug fixes and improvements in React.

npm ls react

@auth0/cloudflare-agent-starter@1.0.0 cloudflare-agents-starter
├─┬ @ai-sdk/react@2.0.85
│ └── react@19.2.1 deduped
├─┬ @auth0/ai-vercel@4.1.0
│ └── react@19.2.1 deduped
├─┬ @phosphor-icons/react@2.1.10
│ └── react@19.2.1 deduped
├─┬ @radix-ui/react-avatar@1.1.10
│ ├─┬ @radix-ui/react-context@1.1.2
│ │ └── react@19.2.1 deduped
│ ├─┬ @radix-ui/react-primitive@2.1.3
│ │ └── react@19.2.1 deduped
│ ├─┬ @radix-ui/react-use-callback-ref@1.1.1
│ │ └── react@19.2.1 deduped
│ ├─┬ @radix-ui/react-use-is-hydrated@0.1.0
│ │ └── react@19.2.1 deduped
│ ├─┬ @radix-ui/react-use-layout-effect@1.1.1
│ │ └── react@19.2.1 deduped
│ └── react@19.2.1 deduped
├─┬ @radix-ui/react-dropdown-menu@2.1.16
│ ├─┬ @radix-ui/react-compose-refs@1.1.2
│ │ └── react@19.2.1 deduped
│ ├─┬ @radix-ui/react-id@1.1.1
│ │ └── react@19.2.1 deduped
│ ├─┬ @radix-ui/react-menu@2.1.16
│ │ ├─┬ @radix-ui/react-collection@1.1.7
│ │ │ └── react@19.2.1 deduped
│ │ ├─┬ @radix-ui/react-direction@1.1.1
│ │ │ └── react@19.2.1 deduped
│ │ ├─┬ @radix-ui/react-dismissable-layer@1.1.11
│ │ │ ├─┬ @radix-ui/react-use-escape-keydown@1.1.1
│ │ │ │ └── react@19.2.1 deduped
│ │ │ └── react@19.2.1 deduped
│ │ ├─┬ @radix-ui/react-focus-guards@1.1.3
│ │ │ └── react@19.2.1 deduped
│ │ ├─┬ @radix-ui/react-focus-scope@1.1.7
│ │ │ └── react@19.2.1 deduped
│ │ ├─┬ @radix-ui/react-popper@1.2.8
│ │ │ ├─┬ @floating-ui/react-dom@2.1.6
│ │ │ │ └── react@19.2.1 deduped
│ │ │ ├─┬ @radix-ui/react-arrow@1.1.7
│ │ │ │ └── react@19.2.1 deduped
│ │ │ ├─┬ @radix-ui/react-use-rect@1.1.1
│ │ │ │ └── react@19.2.1 deduped
│ │ │ └── react@19.2.1 deduped
│ │ ├─┬ @radix-ui/react-portal@1.1.9
│ │ │ └── react@19.2.1 deduped
│ │ ├─┬ @radix-ui/react-presence@1.1.5
│ │ │ └── react@19.2.1 deduped
│ │ ├─┬ @radix-ui/react-roving-focus@1.1.11
│ │ │ └── react@19.2.1 deduped
│ │ ├─┬ react-remove-scroll@2.7.1
│ │ │ ├─┬ react-remove-scroll-bar@2.3.8
│ │ │ │ └── react@19.2.1 deduped
│ │ │ ├─┬ react-style-singleton@2.2.3
│ │ │ │ └── react@19.2.1 deduped
│ │ │ ├── react@19.2.1 deduped
│ │ │ ├─┬ use-callback-ref@1.3.3
│ │ │ │ └── react@19.2.1 deduped
│ │ │ └─┬ use-sidecar@1.1.3
│ │ │   └── react@19.2.1 deduped
│ │ └── react@19.2.1 deduped
│ ├─┬ @radix-ui/react-use-controllable-state@1.2.2
│ │ ├─┬ @radix-ui/react-use-effect-event@0.0.2
│ │ │ └── react@19.2.1 deduped
│ │ └── react@19.2.1 deduped
│ └── react@19.2.1 deduped
├─┬ @radix-ui/react-slot@1.2.3
│ └── react@19.2.1 deduped
├─┬ @radix-ui/react-switch@1.2.6
│ ├─┬ @radix-ui/react-use-previous@1.1.1
│ │ └── react@19.2.1 deduped
│ ├─┬ @radix-ui/react-use-size@1.1.1
│ │ └── react@19.2.1 deduped
│ └── react@19.2.1 deduped
├─┬ agents@0.2.19
│ └── react@19.2.1 deduped
├─┬ lucide-react@0.508.0
│ └── react@19.2.1 deduped
├─┬ react-device-detect@2.2.3
│ └── react@19.2.1 deduped
├─┬ react-dom@19.2.0
│ └── react@19.2.1 deduped
├─┬ react-markdown@10.1.0
│ └── react@19.2.1 deduped
├─┬ react-router@7.9.5
│ └── react@19.2.1 deduped
├── react@19.2.1
└─┬ swr@2.3.6
  ├── react@19.2.1 deduped
  └─┬ use-sync-external-store@1.6.0
    └── react@19.2.1 deduped```
</details> 


<details><summary>npm ls next</summary>
<p>

@auth0/cloudflare-agent-starter@1.0.0 cloudflare-agents-starter
└── (empty)

</p>
</details>