frontend-skills-oklch-color-science-gap

Current frontend skill stack (frontend-taste, frontend-soft, etc.) uses hex/hsl color representations but lacks OKLCH/oklab/lch/lab color science. The Impeccable repo identifies OKLCH-first as a marker of expert-level design quality. Adding OKLCH color pipeline rules to frontend-taste base layer would apply across all aesthetic archetypes (soft/minimalist/brutalist) rather than per-skill.