fix(editor): emit theme link styles in renderHTML

[joaopcm]

Summary

• Link mark renderHTML merges EmailTheming link styles into the emitted <a style="...">. User inline styles still win via CSS cascade (appended last).
• Exports getEmailTheming so the Link extension can resolve the active theme at render time.
• RESET_MINIMAL.link now carries color: #0670DB + text-decoration: underline so both themes ship a default link color.
• No hardcoded colors in link.tsx; all defaults come from getResolvedNodeStyles against the active theme.

Unblocks dropping the DOMParser workaround in the dashboard's generate-json-content.ts (resend/resend#10044).

Bug happening

CleanShot.2026-04-24.at.12.28.11.mp4

After this fix

CleanShot.2026-04-24.at.12.29.59.mp4

Test plan

• New packages/editor/src/extensions/link.spec.ts (6 cases): basic + minimal themes emit themed style, class="node-link" preserved, user color wins over theme, mark.attrs.style stays empty for plain links (inspector contract), plain <a> setContent round-trip produces themed output.
• pnpm vitest run --project unit — 434 passed, 1 skipped, no snapshot regressions.
• pnpm build clean.
• Manual: dashboard Visual -> HTML -> Visual, add link in Visual mode, confirm blue + underline in editor view and in exported HTML.
• Manual: switch theme to minimal, confirm link still themed.
• Manual: set custom link color via inspector, confirm custom color wins in both editor and export.

---

Summary by cubic

Make link rendering theme-aware by injecting EmailTheming styles into the <a> tag during HTML export. Links render blue and underlined by default, and user inline styles still win.

• Bug Fixes

  • Merge theme link styles into <a style> in renderHTML; user inline styles are appended last to win.
  • Move default link styles to RESET_BASIC (color: #0670DB, text-decoration: underline); RESET_MINIMAL references them for consistency.
  • Resolve defaults via getResolvedNodeStyles; no hardcoded colors in the link extension.
  • Fixes link styling loss on Visual ↔ HTML round‑trips; enables removing the DOMParser workaround in the dashboard.

• Dependencies

  • Add changeset for a patch release of @react-email/editor.

^{Written for commit 9af91a9. Summary will update on new commits.}

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Project	Deployment	Actions	Updated (UTC)
react-email	Ready	Preview, Comment	Apr 24, 2026 3:05pm
react-email-demo	Ready	Preview, Comment	Apr 24, 2026 3:05pm

[changeset-bot]

🦋 Changeset detected

Latest commit: 9af91a9

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

This PR includes changesets to release 1 package

Name	Type
@react-email/editor	Patch

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[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@react-email/editor@3418

commit: 9af91a9

[cubic-dev-ai]

No issues found across 5 files

Confidence score: 5/5

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

_{Shadow auto-approve: would require human review. Modifies core HTML rendering logic and style merging for the Link mark. Changes to serialization logic in the editor's core path should be reviewed by a human.}

[cubic-dev-ai]

0 issues found across 2 files (changes from recent commits).

_{Shadow auto-approve: would auto-approve. Isolated fix to ensure link styles are correctly emitted in HTML export. Includes comprehensive test coverage and follows established patterns for style merging.}

[cubic-dev-ai]

0 issues found across 1 file (changes from recent commits).

_{Shadow auto-approve: would auto-approve. Safe bug fix for link styling persistence. It merges theme-aware styles in renderHTML, includes comprehensive tests, and poses low risk to core infrastructure.}