The design's `--ely-font-sans` is Geist; we were registering only
Newsreader. Body text everywhere fell through to GPUI's
`.SystemUIFont` (SF Pro on macOS) — too humanist for the geometric,
calm tech aesthetic the design wants.
Bundle Geist-Regular (SIL OFL 1.1, 126 KB), register it alongside
Newsreader, and set the root window's `.font_family(SANS_FAMILY)`.
SERIF_FAMILY callsites continue to override per element so headlines
keep using Newsreader.
Only Regular is bundled — GPUI synthesizes weights from the metrics,
so 500/600 still read correctly. Bold/italic file additions are a
later polish.
ZacharyZhang-NY
573eaae4a8