feat(ui): layout edge-to-edge + font Geist su tutta l'app

- Font: Geist (Vercel) sostituisce Fraunces/Inter Tight; GeistMono al posto di JetBrains Mono. `--font-display`, `--font-sans`, `--font-mono` mappati tutti su Geist via alias CSS — vocabolario tipografico unificato sans-serif moderno.
- Layout: rimosso `mx-auto max-w-7xl` da 7 pagine app (root, onboarding, profile, plan, tracking, fasting, shopping, recipe detail). Sostituito con `w-full px-6 sm:px-10 lg:px-16 xl:px-24` — edge-to-edge, ma respiro su 4K. Welcome/sign-in/sign-up restano stretti (testo lungo / form login).
- Tailwind: fontFamily fallback display da `Georgia, serif` a `system-ui` sans. Rimosse le OpenType features di Fraunces (`cv11`, `dlig`) — Geist usa `ss01`/`ss03`.
- Cleanup: rimosso `docs/~\$D_KetoPath.docx` (Word lockfile residuo).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/src/app/[locale]/tracking/page.tsx

@@ -65,7 +65,7 @@ function TrackingPageContent({
 
   return (
     <div className="relative">
-      <div className="mx-auto min-h-screen max-w-7xl px-6 sm:px-10">
+      <div className="min-h-screen w-full px-6 sm:px-10 lg:px-16 xl:px-24">
         <Masthead issueLabel="N. 06 — Tracking" />
         <main className="relative overflow-hidden pb-24 pt-10 sm:pt-12">
           <CursorGlow color="hsl(var(--oro))" size={520} />