projects/ui/toc/config/features.ts
Register a global default item template. Resolves after a per-instance *cngxTocItem slot and before the built-in plain-label rendering, so every un-slotted toc renders the same custom item markup.
*cngxTocItem
withTocTemplates(payload: NonNullable)
NonNullable
CngxTocConfigFeature