The previous tray-light.png / tray-dark.png were 128x128 RGBA glyphs with a
black radial background. GNOME's StatusNotifierItem path expects monochrome
silhouettes around 22px base size and was rendering ours as the "three dots"
fallback.
Regenerate from icons/icon-symbolic.svg using Inkscape with a corrected
square viewBox (149 1 944 944, centred on the path bbox) and emit four
sizes per theme (22/32/44/64). decode_tray_icons() now returns Vec<Icon>
so ksni can offer the panel the best match for its bar height and HiDPI.
cc
vicrodh
f533660a43