brand-consistency

Maintain visual coherence across a multi-asset brand set (logo + app icon + favicon + illustrations). Builds BrandBundle (palette, typography, style refs, do-not list), enforces palette per model (Recraft controls.colors, Midjourney --sref, IP-Adapter, LoRA), validates style similarity with CSD and palette ΔE2000, and promotes accepted assets into the reference set so each new generation tightens the lock.