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

favicons/apple-touch-icon-landvex.svg

@@ -0,0 +1,15 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 180 180">
+  <defs>
+    <linearGradient id="lv-bg" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" stop-color="#0A1628"/>
+      <stop offset="100%" stop-color="#0D1F3C"/>
+    </linearGradient>
+    <linearGradient id="lv-accent" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" stop-color="#00D4AA"/>
+      <stop offset="100%" stop-color="#00A884"/>
+    </linearGradient>
+  </defs>
+  <rect width="180" height="180" rx="40" fill="url(#lv-bg)"/>
+  <path d="M45 45 H78 V78 H135 V112 H45 Z" fill="url(#lv-accent)"/>
+  <circle cx="135" cy="56" r="11" fill="#FFFFFF"/>
+</svg>

favicons/apple-touch-icon-quixzoom.svg

@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 180 180">
+  <defs>
+    <linearGradient id="qz-bg" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" stop-color="#0A0A0A"/>
+      <stop offset="100%" stop-color="#1A1A1A"/>
+    </linearGradient>
+    <linearGradient id="qz-accent" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" stop-color="#0066FF"/>
+      <stop offset="100%" stop-color="#0052CC"/>
+    </linearGradient>
+  </defs>
+  <rect width="180" height="180" rx="40" fill="url(#qz-bg)"/>
+  <circle cx="90" cy="90" r="56" fill="none" stroke="url(#qz-accent)" stroke-width="11"/>
+  <circle cx="90" cy="90" r="28" fill="url(#qz-accent)"/>
+  <circle cx="126" cy="54" r="8" fill="#FF3366"/>
+</svg>

favicons/landvex-favicon.svg

@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
+  <defs>
+    <linearGradient id="lv-bg" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" stop-color="#0A1628"/>
+      <stop offset="100%" stop-color="#0D1F3C"/>
+    </linearGradient>
+    <linearGradient id="lv-accent" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" stop-color="#00D4AA"/>
+      <stop offset="100%" stop-color="#00A884"/>
+    </linearGradient>
+  </defs>
+  <!-- Background -->
+  <rect width="512" height="512" rx="128" fill="url(#lv-bg)"/>
+  <!-- L shape -->
+  <path d="M128 128 H224 V224 H384 V320 H128 Z" fill="url(#lv-accent)"/>
+  <!-- Data point -->
+  <circle cx="384" cy="160" r="32" fill="#FFFFFF"/>
+</svg>

favicons/quixzoom-favicon.svg

@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
+  <defs>
+    <linearGradient id="qz-bg" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" stop-color="#0A0A0A"/>
+      <stop offset="100%" stop-color="#1A1A1A"/>
+    </linearGradient>
+    <linearGradient id="qz-accent" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" stop-color="#0066FF"/>
+      <stop offset="100%" stop-color="#0052CC"/>
+    </linearGradient>
+  </defs>
+  <!-- Background -->
+  <rect width="512" height="512" rx="128" fill="url(#qz-bg)"/>
+  <!-- Camera lens shape -->
+  <circle cx="256" cy="256" r="160" fill="none" stroke="url(#qz-accent)" stroke-width="32"/>
+  <circle cx="256" cy="256" r="80" fill="url(#qz-accent)"/>
+  <!-- QuiXzoom dot -->
+  <circle cx="360" cy="152" r="24" fill="#FF3366"/>
+</svg>