By: Kaapo Seppänen <seppanenkaapo@gmail.com>
unify scalar CFF sector generation across medium modes Keep polynomial numerator decomposition and interpolation independent of the medium. Route remainders, contacts, terminal sectors, and zero-edge sectors through the shared scalar builder, which owns medium-specific weights, contour choices, and normalization. Remove duplicated dispatch and consolidate variant remapping so thermal weights and sign provenance survive lifting together. Validated with 141 crate tests, the inverse-propagator cancellation inspect test, cargo check, formatting, and strict Clippy.