Add now-playing view with metadata polling, six-band EQ controls, full REST coverage, companion-chip badges, and gzip-www helper for the embedded setup page. Co-authored-by: Cursor <cursoragent@cursor.com>
Document boot, safeload, Adau1701Driver API, AudioService, parameter map, HTTP usage, and cross-link from hardware, firmware, API, and SigmaStudio chapters. Co-authored-by: Cursor <cursoragent@cursor.com>