In After Effects, text animator Tracking Amount adds the value in absolute
pixels between neighbouring characters, independent of font size. EffectCraft
previously scaled tracking by 1/1000 em (matching static Character-panel
tracking), causing tracking reveals to have significantly reduced spread.
Apply Tracking Amount directly in pixels during glyph positioning layout,
update existing tracking tests to reflect pixel units, and add a regression
test verifying font-size independence.
Fixes#1798
Kushagra Kumar
aacf09a5ca