Fleet UX design concepts

These files preserve the UX direction for the Fleet documentation refactor. Keep them in the repository under docs/design/ or docs/maintainers/ux/ so future documentation changes do not drift back into a flat handbook…

Updated

Recommended target location in the Fleet repo:

docs/design/
  UX-SCORECARD.md
  NAVIGATION-CONCEPT.md
  PAGE-LAYOUT-CONCEPT.md
  CONTENT-CHUNKING-CONCEPT.md
  HERO-SECTIONS-CONCEPT.md
  KS-COMPONENTS-CONCEPT.md
  IA-MAP.md
  VERTICAL-NAV-CONCEPT.md
  VISUAL-LANGUAGE.md

Use these concepts as design contracts.