…able preview

Pull Request resolves #45936 .

• I read the Generative AI policy and my contribution is either not created with the help of AI or is compatible with the policy and GNU/GPL 2 or later.

Summary of Changes

Removes the readonly TinyMCE editor used to display translated descriptions in guided tours and steps and replaces it with a static html preview. This prevents initialization of a second editor instance, makes the content non editable, preserves rendered html output, and eliminates related accessibility issues and TinyMCE console warnings

Testing Instructions

1. Edit a guided tour step whose description uses a language key and confirm only one editor is shown and the translated description appears below as a non editable preview without a second toolbar or cursor
2. Edit a step whose description is plain text and confirm only the main editor is displayed.
3. Create a new step and confirm no preview is shown before saving.
4. Save the new step with a language key in the description and confirm the preview appears after saving.
5. Repeat the same checks in guided tours -> tours.
6. Verify the browser console shows no TinyMCE readonly or duplicate instance warnings.

Actual result BEFORE applying this Pull Request

A second TinyMCE editor is rendered to display the translated description and there is a console warning that says "Invalid value passed for the readonly option. The value must be a boolean"

Expected result AFTER applying this Pull Request

The translated description is displayed as a static, non editable preview and no additional TinyMCE editor instance is created with no console warnings.

Link to documentations

Please select:

• Documentation link for guide.joomla.org:

• No documentation changes for guide.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed