Companion to etcher 0.5.0 / fresco_strip 0.2.0 deep-link work.
Spells out that <Fresco.canvas> geometry (fitBounds, screenToImage,
getCanvasSize, peer-library overlays) lives in canvas-pixel space —
distinct from the source-pixel space used by FrescoStrip.viewer.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>