All three now use identical 20x20 viewBox, 19x19 rect, font-size 8,
centered text with dominant-baseline="central". Updated symbol defs
to match the new 20x20 dimensions.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Reduced font sizes and used dominant-baseline="central" with y at
the vertical center so text is centered both horizontally and
vertically inside the box without overlapping the border.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
