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Session 38: Design system Phase G — living layer, i18n/odds, a11y, paywall, parlay math (1890 tests)

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VYNDR 2.0 conversion, Phase G (the systems that make the design alive). All 5
wired. Frontend-only; zero backend changes.

- lib/parlayMath.js: correlation model (0.62/0.34/0.06/0) + parlayGrade penalty
  + grade->odds + combined odds (frontend; backend parlayService unchanged).
- lib/oddsFormat.js: fmtOdds across american/decimal/fractional/implied with the
  totals-pass-through rule (safer than the prototype's parseAm, which would
  mis-convert 228.5) + region presets.
- lib/prefs.js: applyPrefs sets <html data-*> (the S33 a11y CSS layer) + load/save.
- lib/liveTick.js: single tick engine (SSR/test-safe, no auto-start, fresh state).
- lib/checkout.js: checkoutUrl(plan).
- LiveLayer (useLive/LiveNumber/HeartbeatBar) under the Nav ticker; GlobalHosts in
  layout applies prefs + registers __prefs/__goPaywall/__checkout + hosts the
  Preferences and Paywall modals. Nav read-meter is now a paywall trigger.

Gotchas: useEffect can't return a Set.delete unsub directly (boolean != cleanup);
header grew to 124px so layout paddingTop + Slate sticky-top updated to match.

18 new tests. Backend 1872 -> 1890, 146 suites, zero regressions. Web build clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Kev
2026-06-16 10:37:31 -04:00
parent f88961885c
commit 956a7455eb
13 changed files with 949 additions and 8 deletions
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web/src/components/Slate.tsx
+1 -1
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@@ -555,7 +555,7 @@ export default function Slate({ initialTab = 'all', tier = 'free' }: SlateProps)
<div
style={{
position: 'sticky',
top: 64, // matches Nav height
top: 122, // clears nav (60) + ticker (32) + heartbeat (30) — Session 38
zIndex: 5,
background: 'var(--bg-0, #0A0A0F)',
paddingTop: 12,