Phase 2: React scaffolding, self-hosted fonts, design tokens

Vite builds to dist/, deliberately not www/. www/ is still produced by
sync-www.sh for the Phase 1 APK, which stays installable throughout the
port; cutover is a one-line webDir change in capacitor.config.json.
base is relative because Capacitor serves the bundle from the APK, where
absolute asset paths would 404.

index.html omits viewport-fit=cover on purpose. That string is what
makes Capacitor's SystemBars plugin pass insets through to the page;
without it the plugin pads the decor view and the layout is always
between the status and gesture bars. Phase 1 learned this the hard way.

Fonts are self-hosted for offline use, latin subsets only: three files
at 68K, against the 133K Barlow costs today. Space Grotesk is variable,
so one file covers 400-700. Dropped latin-ext and vietnamese.

Carets are drawn as SVG, not typed. U+25BE and U+23EE sit outside every
Latin subset and would fall back to a system font mid-label.

base.css carries the settled palette and the measured vertical budget as
tokens, so a component cannot quietly exceed it:
  8 + 44 + 8 + 525 + 8 + 84 + 8 + 50 = 735

Verified: typecheck clean, 103 tests, vite build emits with the fonts
copied, and www/ is untouched.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

CLAUDE.md

@@ -254,10 +254,15 @@ panel  8 + 36 + 8 + 124 + 10 + 134 + 10 + 187 + 8    = 525
 pads   (187 - 15) / 4                                = 43px rows
 ```
 
-**Still open:** the typeface (mockups use Space Grotesk + Space Mono; Martian
-Mono and Archivo are the alternates on the specimen board) and whether the accent
-is `#FF4A00` or the current, softer `#ff7a1a`. Neither blocks the data and logic
-work, only the UI.
+**Typeface: Space Grotesk + Space Mono.** Space Grotesk for labels and headings,
+Space Mono for numerals and technical annotations. Self-hosted as woff2 under
+`public/fonts/` — the app must work with no network, as Barlow did. Martian Mono
+was the alternate and was rejected on measurement: it is a wide mono, and key
+labels already clear their buttons by only 2.3px at 7px.
+
+**Accent: `#FF4A00`.** TE's orange, not the softer `#ff7a1a` Phase 1 used. It
+holds against both the light body and the dark mode's near-black, which matters
+because the accent has exactly one job — marking a control as live.
 
 ## Phase 2 must carry these UI changes