Fix text starting with numbers cut off in preview

[Copilot]

Text starting with numbered list patterns (e.g., "1. hello", "2. world") was being stripped in DisplayText preview mode, showing only "hello" and "world".

Root Cause

sanitizeEditorHtml uses draftjs-filters's filterEditorState which applies default block text rules that:

1. Detect patterns like ^1{0,1}\d\.[ \t] as ordered list markers
2. Convert matching blocks to ordered-list-item type
3. Strip the matched prefix from text

With blocks: [] in the filter config, these converted blocks are then filtered out, but the text has already lost the number prefix.

Changes

• packages/rich-text/src/htmlManipulation.ts: Disable automatic list detection by passing blockTextRules: [] to filterEditorState
• packages/rich-text/src/test/sanitizeEditorHtml.ts: Add test coverage for numbered text preservation

  filterEditorState(
    {
      blocks: [],
      styles,
      entities: [],
      maxNesting: 1,
      whitespacedCharacters: [],
+     blockTextRules: [],
    },
    editorState
  )

Fixes #14092

Warning

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• cdn.ampproject.org
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• https://storage.googleapis.com/chrome-for-testing-public/141.0.7390.54/linux64/chrome-headless-shell-linux64.zip
  • Triggering command: node install.mjs (http block)
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Original prompt

---

This section details on the original issue you should resolve

<issue_title>Text starting with numbers cut off in preview</issue_title>
<issue_description>

Bug Description

See https://wordpress.org/support/topic/text-starting-with-a-number-and-dot-e-g-1-storm-gets-cut-in-preview/

This looks like a result of #13858

Expected Behaviour

Steps to Reproduce

Write something like

1. hello
2. world

and then exit edit mode.

The numbers disappear in the <DisplayText> component.

Screenshots

Additional Context

• Plugin Version: 1.40.0
• WordPress Version: 6.7
• Operating System:
• Browser:
  </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Text starting with numbers cut off in preview #14092

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