A CID font of an Adobe CJK collection (Japan1, GB1, CNS1, Korea1) that the PDF
doesn't embed drew nothing unless craft-fonts had a Japanese face: text boxes
from Acrobat (Kozuka Gothic) and Pages (SongtiTC) were blank. After craft-fonts,
the renderer now uses one face already installed on the machine, read at
runtime and never bundled. The face of a multi-region collection (PingFang SC
or TC) is chosen by region. Noto CJK and Source Han are not candidates, and
PDFCRAFT_SYSTEM_FONTS=0 turns it off.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>