fix: restore CORS headers on /api/libraries

[amandeepmittal]

📝 Why & how

PR #2520 rewrote the headers() array in next.config.ts and inadvertently dropped the existing /api/libraries CORS entry. As a result, the endpoint stopped sending Access-Control-Allow-Origin in production.

This breaks every cross-origin browser consumer of the API. In particular, the React Native Directory results in the Expo docs search command menu (docs.expo.dev) now fail with "blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present" followed by "Uncaught (in promise) TypeError: Failed to fetch", which takes down the whole search dialog rather than just the directory section.

This PR re-adds the /api/libraries CORS rule to the headers() array in next.config.ts.

✅ Checklist

• Added library to react-native-libraries.json
• Updated library in react-native-libraries.json

• Documented how you found or replicated the issue.
• Explained how you fixed the issue or built the feature.
• Described how to use or verify the change.

[Simek]

Hey Aman, heh, I was wondering why it's required, now I remember. 🙂

Thanks for catching and restoring headers. 👍

[amandeepmittal]

Hey Aman, heh, I was wondering why it's required, now I remember. 🙂

Thanks for catching and restoring headers. 👍

haha

Thank you for taking a look at this PR so quickly!

Expo docs and its users thank you ❤️