[ui] Add semantic primitive ownership Build a layered Zenbu token and sizing system, make authored controls use native-underneath primitives, migrate mrjunejune without imposing visual surfaces, and document/enforce HTML ownership in the catalog and wiki. Co-authored-by: Copilot <[email protected]>

/**
 * Provides presentation for a native article or section.
 *
 * @extends {HTMLElement}
 */
export class ZenCard extends HTMLElement {}

if (!customElements.get("zen-card")) {
  customElements.define("zen-card", ZenCard);
}