chore: don't use demo email templates in tests

[gabrielmfern]

Meant to fix CI's tests failing in #2487 which is happening because these tests
depend on the demo's email templates.

---

Summary by cubic

Stop using demo email templates in tests to remove cross-package coupling and stabilize CI. Tests now rely on local fixtures for the Vercel invite email.

• Bug Fixes
  • Added local VercelInviteUser email fixtures for preview-server and react-email testing.
  • Updated get-email-component.spec.ts to load the local template.
  • Updated export.spec.ts to use the local emails directory and new snapshot path.

[changeset-bot]

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Latest commit: 4b33f86

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Project	Deployment	Preview	Comments	Updated (UTC)
react-email	Ready	Preview	Comment	Oct 3, 2025 1:08pm
react-email-demo	Ready	Preview	Comment	Oct 3, 2025 1:08pm

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/resend/react-email/@react-email/preview-server@2532

npm i https://pkg.pr.new/resend/react-email@2532

commit: 4b33f86

[cubic-dev-ai]

No issues found across 4 files