PDF Export does not support KaTex or code highlighting

[devleejb]

Description:
Currently, when exporting documents to PDF, the KaTex rendering and code highlighting features are not supported. This limitation arises from the different rendering methods used during the export process. Enhancements are needed to ensure that both KaTex and code highlighting functions properly in the exported PDF documents.

Why:
Supporting KaTex and code highlighting in PDF exports would significantly improve the usability and functionality of the output documents, allowing users to produce professional and visually appealing reports that maintain the integrity of mathematical expressions and code snippets.