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/guides/index.html

@@ -221,7 +221,7 @@
     .footer-social {
       display: inline-flex; align-items: center; justify-content: center;
       width: 34px; height: 34px;
-      border-radius: 8px;
+      border-radius: var(--radius-md);
       border: 1px solid rgba(0,0,0,0.1);
       background: rgba(0,0,0,0.03);
       transition: border-color 0.2s, background 0.2s;
@@ -271,7 +271,7 @@
       <li><a href="/enterprise/">Enterprise</a></li>
       <li><a href="/#contact">Contact</a></li>
     </ul>
-    <a class="btn btn-outline" href="/#contact">Get in touch &#8594;</a>
+    <a class="btn btn-outline" href="/#contact">Get in touch &#8594A1</a>
   </nav>
 
   <div class="page-header">
@@ -292,7 +292,7 @@
         <div class="guide-content">
           <h2>Getting started with Landvex</h2>
           <p>Understand the platform architecture, data flows and how to configure your first intelligence scope.</p>
-          <span class="guide-link">Read guide &#8594;</span>
+          <span class="guide-link">Read guide &#8594A1</span>
         </div>
       </a>
 
@@ -305,7 +305,7 @@
         <div class="guide-content">
           <h2>Data quality standards explained</h2>
           <p>How Landvex defines, measures and enforces field data quality across contributor networks and AI review layers.</p>
-          <span class="guide-link">Read guide &#8594;</span>
+          <span class="guide-link">Read guide &#8594A1</span>
         </div>
       </a>
 
@@ -318,7 +318,7 @@
         <div class="guide-content">
           <h2>How to scope a Landvex pilot</h2>
           <p>Define coverage area, select intelligence verticals, establish success criteria and set a realistic deployment timeline.</p>
-          <span class="guide-link">Read guide &#8594;</span>
+          <span class="guide-link">Read guide &#8594A1</span>
         </div>
       </a>
 
@@ -331,7 +331,7 @@
         <div class="guide-content">
           <h2>Integrating Landvex with your existing GIS stack</h2>
           <p>Connect Landvex intelligence outputs to ArcGIS, QGIS, PostGIS and enterprise spatial data infrastructure via the API.</p>
-          <span class="guide-link">Contact us &#8594;</span>
+          <span class="guide-link">Contact us &#8594A1</span>
         </div>
       </a>
 
@@ -362,7 +362,7 @@
         <a href="/cities/london/">London</a>
         <a href="/cities/bangkok/">Bangkok</a>
         <a href="/careers/">Careers</a>
-        <a href="https://www.quixzoom.com/" target="_blank" rel="noopener">quiXzoom &#8594;</a>
+        <a href="https://www.quixzoom.com/" target="_blank" rel="noopener">quiXzoom &#8594A1</a>
         <a href="mailto:contact@landvex.com">contact@landvex.com</a>
         <a href="https://www.linkedin.com/company/landvex" target="_blank" rel="noopener" class="footer-social" title="LandveX on LinkedIn">
           <svg width="16" height="16" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">