feat(editor): component tests

[cassiozen]

Sets up component testing using Vitest for the editor (alongside existing happy-dom unit tests).

---

Summary by cubic

Adds Chromium-backed component tests for the editor using vitest + Playwright, alongside existing happy-dom unit tests. Migrates prior e2e flows into fast component specs; CI installs Chromium so tests run in GitHub Actions.

• New Features

  • Two-project vitest setup: test:unit (happy-dom) and test:browser (Chromium via Playwright); pnpm test runs both.
  • Vite aliases stub @react-email/render and @react-email/markdown; adds lightweight TestEditor and helpers for real ClipboardEvents.
  • Browser specs cover load/edit, slash commands (Title, Bullet list), bold/italic/underline shortcuts, paste of text/HTML into empty and non-empty docs, and BubbleMenuItem aria/click behavior.

• Dependencies

  • Added @vitejs/plugin-react, @vitest/browser-playwright, vitest-browser-react, and playwright.

^{Written for commit 4c39c36. Summary will update on new commits.}

[changeset-bot]

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Latest commit: 4c39c36

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[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
react-email	Ready	Preview, Comment	Mar 31, 2026 3:05am
react-email-demo	Ready	Preview, Comment	Mar 31, 2026 3:05am
react-email-examples	Ready	Preview, Comment	Mar 31, 2026 3:05am

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	html-to-ast@​0.0.6
	html-to-text@​9.0.5
	@​vitest/​browser-playwright@​4.0.17

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npm i https://pkg.pr.new/@react-email/editor@3140

commit: 058527e

[cassiozen]

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[cubic-dev-ai]

No issues found across 10 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.