usvg knows vector-effect but drops it from the tree it returns, so every
stroke was scaled by its transforms. The importer now records the shapes
that ask for vector-effect="non-scaling-stroke" in its XML prepass (by id)
and gives their strokes and dashes the width they have on screen; type
does the same on its character strokes. Where the width can't be kept
(art in patterns, markers or <use> copies, stretched or skewed type) the
import warns.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>