Replaces desktop and web icon binaries with the new brand mark, ships
PNG raster exports under assets/brand/ alongside the existing SVG
sources, adds Alternative Styles artwork variants, and updates the
icon generation script and System Prompt doc. deploy.sh excludes
the new local-only artifacts (*.rtfd, assets/brand, electronbuild.sh,
multi-platform-roadmap.md) so they don't get rsync'd to the live
boxes. Drops ARCHITECTURE_AUDIT.md (obsolete).
Three semantic copies from Artworks-Backspace/SVG/ — drives the new
icon generator. Element 1 → app-icon (full badge), Element 2 → mark
(bare gradient B, transparent), Element 4 → mark-mono-dark (solid
black for macOS menu-bar template). Element 3 and Element 5 stay in
the archive only.