feat(vite-plugin-cloudflare): disable rsc server handler by default

[edmundhung]

Fixes n/a.

By default, @vitejs/plugin-rsc adds middleware that imports the RSC entry in Node.js. That doesn't work with cloudflare:* imports and isn't needed anyway since we handle requests through workerd.

Previously, users had to work around this by passing rsc({ serverHandler: false }) themselves. This is now configured by us directly using the rsc config option.

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• Tests
  • Tests included/updated
  • Automated tests not possible - manual testing has been completed as follows:
    I can't find an easy way to setup a rsc playground without coupling with a framework.
    To test this:
    • Checkout the custom-entry branch from https://github.com/edmundhung/cloudflare-react-router-rsc
    • Remove { serverHandler: false } from the rsc vite plugin
    • Reproduce the error by running pnpm run preview
    • Try again with the pre-release in this PR.
  • Additional testing not necessary because:
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: We don't have any docs related to RSC yet.

A picture of a cute animal (not mandatory, but encouraged)

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Latest commit: 076c71a

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[claude]

Claude finished @edmundhung's task —— View job

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✅ All changesets look good

The changeset is well-structured:

• Version type: minor is appropriate for a new configuration behavior
• Description: Clear title and helpful explanation of the change
• No markdown header issues: Uses no h1/h2/h3 headers
• User impact: Well-explained with context about the error users were experiencing

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commit: 076c71a

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 2 additional findings.

[petebacondarwin]

I assume that this setting does what you want.

[petebacondarwin]

Is there a playground or e2e test that shows this working?
I'll test it manually - I just read the PR description 😄

[petebacondarwin]

Yes the manual test demonstrates this fix.