fix(editor): use 'strike' mark name for inspector strikethrough

[Btocode]

Fixes #3560

Problem

Clicking Strikethrough in the typography inspector (Inspector.Text → Format row) throws and does nothing:

Uncaught Error: There is no mark type named 'line-through'. Maybe you forgot to add the extension?

The BubbleMenu strikethrough works; only the inspector button is affected.

Root cause

FORMAT_ITEMS in packages/editor/src/ui/inspector/config/text-config.tsx defined the strikethrough entry with the CSS text-decoration value line-through as the mark identifier:

{ value: 'line-through', icon: StrikethroughIcon, label: 'Strikethrough' }

But typography.tsx passes item.value straight into the tiptap command:

onClick={() => toggleMark(item.value)}   // -> editor.chain().focus().toggleMark(mark).run()
aria-pressed={marks[item.value] ?? false}

There is no tiptap mark named line-through, so the toggle throws. The pressed state was also always false, because activeMarks is keyed by MARK_NAMES = ['bold','italic','underline','strike','code'].

Fix

Use the tiptap mark name strike (matching BubbleMenuStrike in ui/bubble-menu/strike.tsx):

{ value: 'strike', icon: StrikethroughIcon, label: 'Strikethrough' }

This fixes both the throw and the pressed-state indicator.

Scope / not changed

• MARK_TOGGLES keeps line-through — it uses an explicit toggleStrike command and text-block-utils maps from the stored text-decoration value (covered by an existing test).
• TEXT_DECORATION_ITEMS keeps line-through — those are genuine CSS text-decoration values.

A changeset is included (@react-email/editor patch).

---

Summary by cubic

Fix the Strikethrough button in the typography inspector in @react-email/editor by using the tiptap mark name strike instead of the CSS value line-through. This removes the runtime error and restores the pressed state.

^{Written for commit 731aea2. Summary will update on new commits.}

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[changeset-bot]

🦋 Changeset detected

Latest commit: 731aea2

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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[cubic-dev-ai]

No issues found across 2 files

Confidence score: 5/5

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

<sub>Requires human review: Fixes a bug in the tiptap editor by correcting a mark name. However, this changes behavior in the core editor UI and involves understanding of internal tiptap extension naming, which is best reviewed by a human to avoid regressions.

Re-trigger cubic</sub>