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/cities/berlin/index.html

@@ -180,7 +180,7 @@
       display: flex; align-items: center; gap: 10px;
     }
     .district-chip .chip-dot {
-      width: 8px; height: 8px; border-radius: 50%;
+      width: 8px; height: 8px; border-radius: var(--radius-full);
       background: var(--blue); flex-shrink: 0;
     }
     .district-chip span { font-size: 14px; font-weight: 600; color: var(--text-light); }
@@ -251,7 +251,7 @@
     .contradiction-box {
       background: rgba(0,0,0,.05);
       border: 1px solid rgba(0,0,0,.1);
-      border-radius: 16px; padding: 36px 40px; margin-bottom: 32px;
+      border-radius: var(--radius-lg); padding: 36px 40px; margin-bottom: 32px;
     }
 
     .conflict-header {
@@ -265,7 +265,7 @@
 
     .conflict-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
 
-    .conflict-side { border-radius: 10px; padding: 16px; }
+    .conflict-side { border-radius: var(--radius-md); padding: 16px; }
     .conflict-official { background: rgba(34,197,94,.1); border: 1px solid rgba(34,197,94,.2); }
     .conflict-observed { background: rgba(239,68,68,.1); border: 1px solid rgba(239,68,68,.2); }
 
@@ -300,7 +300,7 @@
 
     /* CTA BANNER */
     .cta-banner {
-      background: #e8f0fe; border-radius: 16px; padding: 40px 48px;
+      background: #e8f0fe; border-radius: var(--radius-lg); padding: 40px 48px;
       display: flex; align-items: center; gap: 48px; flex-wrap: wrap;
       margin-top: 48px;
     }
@@ -352,7 +352,7 @@
     .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;
     }
@@ -387,7 +387,7 @@
       .scores-grid { grid-template-columns: 1fr !important; }
     }
   
-    .lv-disclaimer{font-size:.75rem;color:rgba(0,0,0,.75);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,.75);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}
     .lv-disclaimer--light{color:#888;background:#f5f5f5}
     .lv-disclaimer--light a{color:#555}
@@ -632,18 +632,18 @@
           <div class="conflict-side conflict-official">
             <div class="conflict-side-label">Official narrative</div>
             <ul>
-              <li>&#10003; &euro;2.4bn development investment committed 2024&ndash;2025</li>
-              <li>&#10003; Tempelhof: major mixed-use regeneration zone</li>
-              <li>&#10003; Construction permits up 18% year-on-year</li>
+              <li>&#100003 &euro;2.4bn development investment committed 2024&ndash;2025</li>
+              <li>&#100003 Tempelhof: major mixed-use regeneration zone</li>
+              <li>&#100003 Construction permits up 18% year-on-year</li>
             </ul>
           </div>
           <div class="conflict-side conflict-observed">
             <div class="conflict-side-label">Observed reality</div>
             <ul>
-              <li>&#10007; Active construction sites below permit volume</li>
-              <li>&#10007; Tempelhof: planning delays visible on ground</li>
-              <li>&#10007; Neuk&ouml;lln commercial vacancy increasing</li>
-              <li>&#10007; Prenzlauer Berg outperforming official projections</li>
+              <li>&#100007 Active construction sites below permit volume</li>
+              <li>&#100007 Tempelhof: planning delays visible on ground</li>
+              <li>&#100007 Neuk&ouml;lln commercial vacancy increasing</li>
+              <li>&#100007 Prenzlauer Berg outperforming official projections</li>
             </ul>
           </div>
         </div>