Enables \DocumentMetadata (pdfversion=2.0, pdfstandard=ua-2) and loads
tagpdf with activate-all, plus hyperref metadata (pdftitle, pdfauthor,
pdflang, pdfdisplaydoctitle) since the letter class does not expose
\title/\author for the PDF management layer to pick up. Verified
compliant with verapdf's PDF/UA-2 profile.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Moves paper, assignment, and letter templates from pdflatex to
lualatex, and replaces the Type-1 font setup (mathdesign/garamond,
ucs/utf8x, T1 fontenc) with fontspec using EB Garamond for the main
font and TeX Gyre Heros for sans. This produces PDFs whose text
extracts cleanly and is a prerequisite for tagged/accessible PDF
output.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
