ANU-13: Implement PresentationConfig v2 and multi-surface compilation

This directory records the repository-owned implementation and verification for ANU-13, the CMS PresentationConfig v2 child of Product Main change 2026-07-24-anuva-bento-integration.

• Implementation plan
• Implementation log
• Completion report

ANU-13 replaces the active Reveal-oriented compilation and render-package contract with a versioned Anuva Bento aggregate containing independent Main, Companion, and Emphasis documents plus one authoritative timeline. Editor embedding, AI editing operations, and shared Web player integration remain owned by the dependent ANU-14 child.