The initial favicon.ico used RGB PNG frames which caused a Turbopack build
failure: 'unable to decode image data - The PNG is not in RGBA format'.
Regenerate all three ICO frames (16x16, 32x32, 48x48) with PNG color type 6
(RGBA) to satisfy Next.js 16 Turbopack image processing requirements.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>