Code syntax highlight does not work in codeblock

[davidjennicson]

Describe the bug
The code syntax highlighting feature is not working. Neither auto-detect nor manually selecting a language (e.g., Python) applies syntax highlighting. This issue affects all languages, not just Python. It appears similar to issue #1492.

To Reproduce
Steps to reproduce the behavior:

1. Create a Chapter (e.g., "Chapter 1") in an existing course

2. Create a Lesson associated with this chapter (e.g., "Lesson 1")

3. Click "Edit"

4. Click the "+" button and select "CodeBox"

5. Set language to "Auto-detect" or manually select "Python"

6. Enter a simple code snippet, for example:

   def hello():
       print("Hello World")

7. Observe that syntax highlighting is not applied

Expected behavior
Syntax highlighting should be applied automatically when "Auto-detect" is selected or when a specific language (e.g., Python) is chosen.

Screenshots

Desktop (please complete the following information):

• OS: Windows 11
• Browser: Chrome

Smartphone (please complete the following information):
N/A

Additional context

• Frappe version: 17.x.x-develop (e196232)
• LMS version: 2.45.2 develop (41fb007)
• Payments version: 0.0.1 develop (3cebd94)

This issue persists across all tested languages and is not limited to Python.