Each layer carried both a fixed "image-name" and per-appearance
"image-name-specializations". actool treats the fixed name as the image for
every appearance and drops the specializations, so Assets.car held only the
light PNGs and dark mode showed the black girl and black ring on the dark
fill: a black squircle. Icon Composer itself writes one or the other, never
both.
Drop the fixed name; the manifest test now rejects it and requires a dark
specialization on every layer. Verified on macOS 26.6.2 in dark mode: the
catalog gains art-dark/border-dark and the Dock shows the white girl.
cfc05e70b9