Safari, the iOS home screen, Android install and push notifications
still showed the old film-reel artwork beside the new theme colour. The
PNGs are now rendered from the SVG mark by `npm run icons` (Inkscape,
no image library in node_modules): the bare mark for the 32px favicon,
the mark on the stage colour for app icons, and a maskable variant with
the extra margin Android's adaptive crop needs.
