feat: atlas-style test report with ecosystem narratives and OLED screenshots

- Reorder sections: NEW 7.14.0 features first, legacy chains after
- Executive summary: "What's New in 7.14.0" with security context
- Rich ecosystem narratives per chain (TVL, architecture, security model)
- Enriched test descriptions explaining WHY each test exists
- Screenshot annotations describing what the user sees on OLED
- Added show_address tests (S3b/T3b/N2b) with QR+address screenshots
- BIP-85 multi-page seed word screenshots
- TOC grouped: "7.14.0 New Features" / "Proven Chains (regression suite)"
- Skip count in section headers for BIP-85

Author: BitHighlander