[BUG-1919] experimental app router updates to next 15 and react 19

[CesarBenavides777]

Tasks

• [] I have signed a Contributor License Agreement (CLA) with WP Engine.
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• If a code change, I have written testing instructions that the whole team & outside contributors can understand.
• I have written and included a comprehensive changeset to properly document the changes I've made.

Description

---

'@faustwp/experimental-app-router': minor

Update @faustwp/experimental-app-router to account for next 15 changes to cookies and update NextResponse import

Notable changes:

• Adding await to all cookies requests as per Next documentation: https://nextjs.org/docs/app/api-reference/functions/cookies

import { cookies } from 'next/headers'
 
export default async function Page() {
  const cookieStore = await cookies()
  const theme = cookieStore.get('theme')
  return '...'
}

• Files changed:

  • packages/experimental-app-router/src/server-actions/logoutAction.ts
  • packages/experimental-app-router/src/server-actions/utils/setRefreshToken.ts
  • packages/experimental-app-router/src/server/auth/fetchTokens.ts
  • packages/experimental-app-router/src/server/routeHandler/tokenHandler.ts

• Added use server to logout action

• Files changed:

  • packages/experimental-app-router/src/server-actions/logoutAction.ts

• Updated Next App Router example to use latest next version and React 19 RC.

• Updated Example Login form using React 19s useActionState

• Files Changed:

  • examples/next/app-router/app/login/page.tsx
  • examples/next/app-router/package.json

Related Issue(s):

• [BUG] onLogin function does not work properly on vercel once deployed, but works on local development #1919

Testing

Built and linked the local package to the updated example repo and it works as expected.
repo: https://github.com/CesarBenavides777/1919-fix-reproduction.git
Used bun and latest react and next versions just to see if it would work.
Built locally using vercel build --prod and vercel --prebuilt --prod to deploy it linked with the updated package.

https://1919-fix-reproduction.vercel.app/login
https://1919-fix-reproduction.vercel.app/my-account

Deployed on vercel
Subscriber User Credentials:
Username: TEST
Password: qk!TJAlsUC*dqRBy2z(u6(rQ

Screenshots

Documentation Changes

None

Dependant PRs

[headless-platform-by-wp-engine]

Currently, we do not support the creation of preview deployments based on changes coming from forked repositories.
Learn more about preview environments in our documentation.

[changeset-bot]

🦋 Changeset detected

Latest commit: 1acee20

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@faustwp/experimental-app-router	Minor

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[theodesp]

Hey @CesarBenavides777 There is a conflicting peer dependency with next 15. maybe we can reduce that to be next 13 and onwards.

https://github.com/wpengine/faustjs/blob/08a54c61714e005c49cf9a7000f1a65bd85ff6d1/packages/experimental-app-router/package.json#L54C4-L54C24

[CesarBenavides777]

@theodesp do you want me to revert the changes I made to the example repo? That's using the latest next and react as well.

[theodesp]

Hey @CesarBenavides777 It looks like it works now. I will review.

[headless-platform-by-wp-engine]

Currently, we do not support the creation of preview deployments based on changes coming from forked repositories.
Learn more about preview environments in our documentation.