An <img> sees neither data-theme nor the document's color, so the ink stem and
its prefers-color-scheme flip left it dark on the dark chrome. One slate stem
instead: 5.1:1 on white, 3.5:1 on the dark surfaces.
An embedded prefers-color-scheme media query swaps the ink stem and
leaf fills for the app's own dark-theme tokens, so the near-black
stem no longer vanishes on a dark tab bar.
Two asymmetric blades on a ground line, in the slate/clay brand
colors, replace the old page-lines icon. The old favicon is kept as
favicon-old.svg. The About dialog shows it above the wordmark.
Steffen Becker
