The DMG opened as a plain Finder window. It now shows the app icon's figure on
the GridCraft colour, with GridCraft.app and the Applications link side by side.
Same approach as PhotoCraft's and VectorCraft's (storytold/photocraft#1201,
storytold/vectorcraft#493).
- packaging/macos/dmg/: background.svg (source; text outlined, no paper grain,
the figure an <image> of assets/app-icon), background.tiff (1x + 2x HiDPI,
16-colour palette, Deflate, sRGB; ~26 KB)
and dmg-layout.DS_Store (Finder view settings: window, icon size 128,
positions, background).
- generate.py writes the TIFF and the layout on any OS, byte-for-byte
reproducible, with nothing from the machine that ran it (no paths, users,
disk names or volume UUIDs).
- package.sh copies them into the staging folder; the image is still built with
hdiutil makehybrid. Nothing extra runs in the signing job.
- The volume name drops the version: the layout finds the background through
an alias that includes the volume name. The DMG file name keeps the version.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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