The export zip contained both a pre-rendered appiconset AND the
Fuelboard.icon composer project; the pre-baked PNGs were a different
(flatter) render. Re-rendered the .icon bundle with ictool (Xcode 26
Icon Composer executable) — Default/Dark/TintedLight renditions at
1024pt — and replaced the three asset-catalog slots.
Replaces the single 1024px icon with the three-variant set (universal,
dark-luminosity, tinted) generated for FuelBoard; Contents.json updated to
the iOS-only slots.