Bug: Mermaid flowchart not rendering on Courses sites

[Matcry12]

Description

The Mermaid.js flowchart in the "Architecture" section (or relevant page) is not rendering visually. Instead, it displays the raw Mermaid syntax as a code block.

Steps to Reproduce

1. Navigate to the course page containing the Claude Code architecture flow.
2. Scroll down to the "Here's how the architecture flows:" section.
3. Observe that the graph code is visible instead of a diagram.

Technical Details

• Syntax observed: graph LR ...
• Environment: Ubuntu 25.04
• Browser: Chrome
• Hardware: NVIDIA GTX 1660 Super (Driver 580)

Evidence