Add comprehensive favicon and PWA support

assets/images/favicon-32x32.svg

@@ -0,0 +1,15 @@
+<svg width="32" height="32" xmlns="http://www.w3.org/2000/svg">
+  <defs>
+    <linearGradient id="faviconGrad32" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" style="stop-color:#667eea;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#764ba2;stop-opacity:1" />
+    </linearGradient>
+  </defs>
+  <!-- Favicon background -->
+  <rect width="32" height="32" fill="url(#faviconGrad32)" rx="6"/>
+  <!-- UK initials -->
+  <text x="16" y="22" font-family="Arial, sans-serif" font-size="16" font-weight="bold" fill="white" text-anchor="middle">UK</text>
+  <!-- Data symbol -->
+  <rect x="6" y="6" width="20" height="2" fill="white" opacity="0.8" rx="1"/>
+  <rect x="8" y="9" width="16" height="1" fill="white" opacity="0.6" rx="0.5"/>
+</svg>