0e3cbbd2df
The lcms2-stub was a CMake-imported shared library that returned NULL/zero from every API: cmsOpenProfileFromMem, cmsCreateTransform, cmsDoTransform, cmsCreate_sRGBProfile, cmsGetProfileInfo, and the rest. KWin color correction, ICC profile lookup, and color space transformation were silently broken — every transform call produced identity output. Replace it with the real lcms2 (mm2/Little-CMS lcms2.19 fork) — the full upstream C source built via CMake, providing real profile parsing, gamut mapping, ICC v4 / v2 profile handling, sRGB profile generation, and the LittleCMS transform pipeline. Recipe bumped to 0.2.3 with v6.0 2026 description.