fix(mdxish-editor): embed serialization missing data

[Jadenzzz]

	Fix RM-XYZ

🧰 Changes

Missing Embed attributes

Added missing Embed attributes to serialization process

Multi line Embed serialization bug

Problem

Multi-line <Embed /> JSX content failed to deserialize in the MdxishEditor, throwing:
RangeError: Invalid content for node doc: <>

Root Cause

When JSX spans multiple lines like:

  <Embed                                                                                                   
    typeOfEmbed="youtube"                                                                                  
    url="https://example.com"                                                                              
  />                    

CommonMark doesn't recognize it as an HTML block (because <Embed is incomplete on line 1). Instead, it
wraps it in a paragraph > html structure, which downstream processors couldn't handle correctly.

Solution

Created a new AST-level plugin mdxish-self-closing-blocks.ts that:

1. Detects paragraph nodes containing a single html child with a self-closing PascalCase component tag
2. Converts the structure to a proper mdxJsxFlowElement node
3. Only processes specific component tags (currently Embed) via a configurable allowlist
4. Runs only when newEditorTypes: true to limit scope to the new editor

🧬 QA & Testing

• Broken on production.
• Working in this PR app.

[eaglethrost]

What's data raw value for?

[Jadenzzz]

I added it because I thought we need to preserve the magic block format. Thanks for pointing this out!
Just removed it

[eaglethrost]

Flow looks good, requested some changes

[eaglethrost]

Nice looks good, tested with the readme side PR and it seems to have fixed the serialization issue!

Resolved