feat: Passwordless cross-device authentication

- Arkitektur: docs/auth/passwordless-architecture.md
- Backend: iom/quixzoom-auth-service/ (FastAPI + Redis)
- Webb: quixzoom-market-pages/se/login/ (QR-kod + polling)
- App: iom/quixzoom-app/src/features/auth/ (push + deep links)

Flöde: QR-kod → app-godkännande → webb-inloggad

landvex-site/sla/index.html

@@ -251,7 +251,7 @@
 
     .breach-step-num {
       width: 48px; height: 48px; flex-shrink: 0;
-      background: var(--blue); border-radius: 50%;
+      background: var(--blue); border-radius: var(--radius-full);
       display: flex; align-items: center; justify-content: center;
       font-size: 16px; font-weight: 800; color: #1d1d1f;
       position: relative; z-index: 1;
@@ -313,13 +313,13 @@
     .footer-links a { font-size: 14px; color: var(--text-muted); transition: color 0.2s; }
     .footer-links a:hover { color: #1d1d1f; }
     .footer-social {
-      width: 32px; height: 32px; border: 1px solid var(--border); border-radius: 8px;
+      width: 32px; height: 32px; border: 1px solid var(--border); border-radius: var(--radius-md);
       display: flex; align-items: center; justify-content: center;
       transition: border-color 0.2s, background 0.2s;
     }
     .footer-social:hover { border-color: rgba(0,0,0,0.25); background: rgba(0,0,0,0.04); }
 
-    .lv-disclaimer { font-size: .75rem; color: rgba(0,0,0,.5); margin-top: 24px; padding: 12px 16px; background: rgba(0,0,0,.04); border-radius: 8px; line-height: 1.6; max-width: 800px; }
+    .lv-disclaimer { font-size: .75rem; color: rgba(0,0,0,.5); margin-top: 24px; padding: 12px 16px; background: rgba(0,0,0,.04); border-radius: var(--radius-md); line-height: 1.6; max-width: 800px; }
     .lv-disclaimer a { color: rgba(0,0,0,.65); text-decoration: underline; }
 
     @media (max-width: 900px) {
@@ -381,7 +381,7 @@
       Service Level Commitments
     </div>
     <h1>Service Level Commitments.</h1>
-    <div style="background:#fef3c7;border:1px solid #f59e0b;border-radius:8px;padding:10px 18px;margin-bottom:20px;font-size:.875rem;color:#92400e"><strong>Pre-launch:</strong> These commitments apply from August 2026. During the pre-launch period, SLA terms are available for discussion in pilot agreements.</div>
+    <div style="background:#fef3c7;border:1px solid #f59e0b;border-radius: var(--radius-md);padding:10px 18px;margin-bottom:20px;font-size:.875rem;color:#92400e"><strong>Pre-launch:</strong> These commitments apply from August 2026. During the pre-launch period, SLA terms are available for discussion in pilot agreements.</div>
     <p class="hero-sub">Landvex operates to defined standards of data freshness, platform availability, and delivery reliability. This page documents the commitments we make to clients and how breaches are handled.</p>
     <div class="hero-ctas">
       <a class="btn btn-lg" href="/contact/">Discuss SLA requirements &rarr;</a>