Ship a default wallpaper (blossoms by Nikhil Kumar, Unsplash License) in
a new 0:/os/wallpapers/ directory for OS-provided imagery, staged from
programs/data/wallpapers/. login.elf falls back to
0:/os/wallpapers/default.jpg when the desktop config names no wallpaper
or the configured file cannot be opened. Attribution added to
THIRD-PARTY-NOTICES.txt and man legal.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
