feat(editor): return non-prettified HTML from composeReactEmail

[lucasfcosta]

Currently composeReactEmail returns only the Prettier-formatted HTML. For deeply-nested table-based emails (typical Stripo or Mailchimp exports), Prettier indentation accounts for ~78% of the output bytes — a 55 KB import becomes ~400 KB and pushes past Gmail's 102 KB clipping threshold, breaking open tracking and truncating content.

The compact form is already computed inside the function — it's what render() returns before pretty() runs. This PR additively exposes it as unformattedHtml. The existing html field is unchanged, so no caller breaks.

// Before
const { html, text } = await composeReactEmail({ editor });

// After (existing destructure still works)
const { html, text, unformattedHtml } = await composeReactEmail({ editor });

Measurements (deep Stripo-like input)

	Bytes
Input HTML	~53 KB
render() output (= new unformattedHtml)	~57 KB
pretty() output (= existing html)	~393 KB

Notes for reviewers

• unformattedHtml is non-optional in the return type since the value is always available.
• No behavior change for html or text.

---

Summary by cubic

Expose compact, non-prettified HTML from composeReactEmail as unformattedHtml to reduce email size for nested table layouts and avoid Gmail’s 102 KB clipping. html (Prettier-formatted) and text are unchanged; additive and backward-compatible.

• Migration
  • Use unformattedHtml when persisting or sending; keep html for source display views.

^{Written for commit 4d874a4. Summary will update on new commits. Review in cubic}

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[changeset-bot]

🦋 Changeset detected

Latest commit: 4d874a4

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	Minor

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[pkg-pr-new]

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npm i https://pkg.pr.new/@react-email/editor@3538

commit: 4d874a4

[cubic-dev-ai]

No issues found across 3 files

Confidence score: 5/5

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

<sub>Auto-approved: This change additively exposes the already-computed unformatted HTML from composeReactEmail as a new field, with no modifications to existing behavior, full test coverage, and no risk of breakage.

Re-trigger cubic</sub>

[cubic-dev-ai]

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

<sub>Auto-approved: The change is additive and backward-compatible, exposing an already-computed unformattedHtml field without altering existing html or text behavior, and includes a targeted test; the blast radius is limited to the serializer module with no risk to core logic, data integrity, or production...

Re-trigger cubic</sub>