projects/common/stepper/slots/stepper-template-cascade.ts
import { CngxStepperTemplateBindingsOptions } from '@cngx/common/stepper'
Inputs to createStepperTemplateBindings. The organism owns the contentChild() queries (NG8110 - must run in component injection context) and the resolved CngxStepperConfig; this factory absorbs the 3-stage cascade per slot key.
contentChild()
Signal
CngxStepperConfig
Optional - the error slot is desktop-label-area only; absent on variants that have no label region.