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* fix(adjust): Hue/Saturation saturation, lightness order and Colorize as in Photoshop Measured in Photoshop 27.11: - Raising Saturation divides it by (1 - s): +50 doubles it. PhotoCraft multiplied by (1 + s), up to 26 levels off. - Master Lightness applies first; hue and saturation then work on the result. Fixes the corpus file adjustments/rgb8/hue-saturation (Hue +40, Saturation +25, Lightness -10): 17 levels / 11.8 % bad -> 2 / 0 %. - Colorize builds the colour at the lightened lightness, so black with Lightness +30 is a 30 % lightness colour, not grey (was 78 off). - A colour range's positive Lightness lightens towards the pixel's brightest channel, not towards white (Blues +50 was 71 off). All 18 Hue/Saturation probe cases are within 4 levels. Corpus: the Colorize files go to 1-3 levels (psd-tools huesaturation_colorize_rgb 120 -> 3). CPU and GPU paths. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * fix(adjust): a range's negative Lightness darkens towards the darkest channel Measured in Photoshop 27.11 (Blues -50 / -100, Reds -50): (102, 128, 204) at Blues -50 becomes (102, 115, 154), towards the pixel's darkest channel, not towards black. Mirrors the positive rule (towards the brightest). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>