Per #2214 , it turns out that in fn layout_text of math/ctx.rs, which handles the layout of math content, regular text is handled by the typst standard text layout (which will be calling the shaping engine), while the a single letter in a math font or a number is handled without going into the standard layout routines, but instead with an ad-hoc layout function in MathFragment::GlyphFragment.

The baseline shift is not taken consideration by the GlyphFragment which causes the issue of #2214. This PR fixes the issue as well as providing the bug's test case tests/typ/bugs/math-shift.typ.

hello #text(baseline: -5pt)[123 #sym.WW\orld]\
hello #text(baseline: -5pt)[$123 WW#text[or]$ld]\

result: