Thai folder and file names drew boxes: the UI fell back only on craft-fonts' CJK faces, so a
Thai face (craft-fonts #15) or the Arabic one already there was never used. fonts::ui_fallback
keeps the CJK faces first, in their per-language order, then appends every face of another
non-Latin script, whatever the interface language (a Latin-only face is no fallback: Inter covers
Latin). theme.rs builds the Proportional, SemiBold and Monospace families from it.
Tests: the fallback order on synthetic faces; with a craft-fonts build that has a Thai face,
every UI family falls back on it, and the shipped Thai and Arabic faces have their script's glyphs.
radialmonster
d803d905b4