Function ensureMermaidTheme

ensureMermaidTheme(diagramBody: string): string
Prepend CANONICAL_MERMAID_INIT to diagramBody iff it does not already carry a theme declaration. Pure function — never mutates the input string.
Parameters
- diagramBody: string
Returns string
- Defined in scripts/render-lib/markdown/mermaid-canonical-theme.ts:80