Mermaid and KaTeX

Mermaid #

markdown
```mermaid
graph LR
  A[Hugo build] --> B[Search JSON]
  B --> C[Browser search]
```
graph LR
  A[Hugo build] --> B[Search JSON]
  B --> C[Browser search]

Use Mermaid when a diagram explains a flow more clearly than a long paragraph.

KaTeX #

markdown
```katex
E = mc^2
```
\[ E = mc^2 \]

Inline math uses $E = mc^2$.

SeoTax includes Mermaid and KaTeX resources, so these features do not require a separate CDN configuration.