Sources for the tb_web_*.png icons (notation pane buttons).

Drawn on a 24x24 pixel grid so they stay crisp; keep coordinates on whole pixels.
The files use #1e1e1e (light themes); the dark variants use #d8d8d8.
The eval bar keeps its fixed black/white fill in both variants.

Render (from the img directory):
  for f in icons_src/tb_web_*.svg; do
    n=$(basename "$f" .svg)
    rsvg-convert -w 24 -h 24 "$f" -o "icons_light/$n.png"
    sed 's/#1e1e1e/#d8d8d8/g' "$f" | rsvg-convert -w 24 -h 24 -o "icons_dark/$n.png"
  done
