multica

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Naiyuan Qing 4b10c9354a fix(fonts): swap Geist Sans → Inter with explicit CJK fallback

Full-width Chinese punctuation (e.g. ，) was rendering at Latin-font
metrics, making it look half-width in the editor. Root cause: Geist is
Latin-only, and neither web (next/font) nor desktop (@fontsource) declared
any CJK fallback, so CJK chars inherited Geist's em-box width through
Chromium's per-character fallback.

- Web (apps/web/app/layout.tsx): Geist → Inter via next/font/google,
  with explicit fallback array: system fonts → PingFang SC (macOS) →
  Microsoft YaHei (Windows) → Noto Sans CJK SC (Linux) → sans-serif.
- Desktop: removed @fontsource/geist-sans, added @fontsource-variable/inter
  (single variable-weight file replaces 4 static weights). Updated
  --font-sans in globals.css to match web's fallback chain.
- Geist Mono kept for code blocks; mono chain has no CJK fallback by
  design (CJK is non-aligned in mono grids, listing CJK fonts would
  falsely signal alignment guarantees). Added Consolas to web mono for
  Windows symmetry with desktop.
- Cross-reference sync comments in both layout.tsx and globals.css:
  CJK tail must stay in sync; Inter primary differs by design (next/font
  injects `__Inter_xxx` with adjustFontFallback metric override;
  fontsource uses raw "Inter Variable").

Currently covers English + Simplified Chinese. When ja/ko i18n lands,
extend fallback tails with Hiragino Kaku Gothic ProN / Yu Gothic /
Apple SD Gothic Neo / Malgun Gothic.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-04-15 08:45:14 +08:00