9b0273feb3
* fix(linux): install Lanczos-resized panel icons, not a PNG in scalable Cinnamon's panel is ~24px. v2026.8.31 dropped the 1024px asset into hicolor/scalable (SVG-only), so the Mint panel nearest-neighbor scaled it into a mangled blob. Decode the PNG and write 24/32/48/256 rasters; undecodable bytes still copy into one indexed dir. Drop the leftover scalable file. * test(linux): cover resized hicolor panel icons and stale scalable cleanup Pin that a decodeable PNG lands as 24×24/256×256 rasters (not scalable), a leftover scalable copy from v2026.8.31 is deleted, and truncated PNGs still fall back to an indexed copy.