Function buildMindmapSection

buildMindmapSection(
    config: MindmapConfig | null | undefined,
    lang?: string,
    heading?: string,
): string
Generate a color-coded mindmap section as an HTML string.

Returns an empty string when config is null/undefined or has no branches, following the same convention as buildSwotSection and buildDashboardSection.
Parameters
- config: MindmapConfig | null | undefined
  Mindmap data (topic, branches, optional summary).
- lang: string = 'en'
  BCP 47 language code for the section heading.
- Optionalheading: string
  Optional heading override.
Returns string
HTML string for the mindmap section, or empty string.
- Defined in src/generators/mindmap-content.ts:134