v0.1.6

• Docs site redesign:
  • a sticky sidebar that highlights the current section, and a dark/light toggle that is remembered across visits;
  • color, theme-variable, type, spacing and radius cards with copy buttons;
  • a live preview of every component above its markup;
  • code highlighted at build time (no highlighter script ships), with copy buttons;
  • a hero built from real components.
• Tests: axe in both themes, theme persistence, sidebar targets, copy, and that each live example matches its code.
• No changes to dist/.