Update icon and feature graphic to white minimal theme

- White background with dark slate devices (#1e293b)
- Cyan signal bars (#0ea5e9)
- Simplified clean design: phone → signal → laptop

assets/icon.svg

@@ -1,85 +1,20 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
-  <defs>
-    <linearGradient id="bg" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" style="stop-color:#0f172a"/>
-      <stop offset="100%" style="stop-color:#1e293b"/>
-    </linearGradient>
-  </defs>
+  <rect width="512" height="512" rx="108" fill="#ffffff"/>
 
-  <!-- Dark background -->
-  <rect width="512" height="512" rx="96" fill="url(#bg)"/>
+  <!-- Phone -->
+  <rect x="72" y="176" width="88" height="160" rx="16" fill="#1e293b"/>
+  <rect x="82" y="190" width="68" height="116" rx="6" fill="#ffffff"/>
+  <rect x="100" y="316" width="32" height="6" rx="3" fill="#ffffff"/>
 
-  <!-- Circuit traces -->
-  <g stroke="#0ea5e9" stroke-width="3" fill="none" opacity="0.4">
-    <path d="M 80 256 H 140"/>
-    <path d="M 372 256 H 432"/>
-    <path d="M 256 80 V 140"/>
-    <path d="M 256 372 V 432"/>
-    <path d="M 140 180 L 180 140"/>
-    <path d="M 332 140 L 372 180"/>
-    <path d="M 140 332 L 180 372"/>
-    <path d="M 332 372 L 372 332"/>
+  <!-- Signal bars -->
+  <g fill="#0ea5e9">
+    <rect x="192" y="270" width="20" height="44" rx="4"/>
+    <rect x="224" y="246" width="20" height="68" rx="4"/>
+    <rect x="256" y="222" width="20" height="92" rx="4"/>
   </g>
 
-  <!-- Main connection lines -->
-  <g stroke="#0ea5e9" stroke-width="4" fill="none">
-    <!-- Center to outer nodes -->
-    <line x1="256" y1="256" x2="160" y2="160"/>
-    <line x1="256" y1="256" x2="352" y2="160"/>
-    <line x1="256" y1="256" x2="160" y2="352"/>
-    <line x1="256" y1="256" x2="352" y2="352"/>
-    <!-- Horizontal and vertical -->
-    <line x1="256" y1="256" x2="140" y2="256"/>
-    <line x1="256" y1="256" x2="372" y2="256"/>
-    <line x1="256" y1="256" x2="256" y2="140"/>
-    <line x1="256" y1="256" x2="256" y2="372"/>
-  </g>
-
-  <!-- Data flow dots (animated feel) -->
-  <g fill="#22d3ee">
-    <circle cx="190" cy="190" r="4"/>
-    <circle cx="322" cy="190" r="4"/>
-    <circle cx="190" cy="322" r="4"/>
-    <circle cx="322" cy="322" r="4"/>
-    <circle cx="180" cy="256" r="3"/>
-    <circle cx="332" cy="256" r="3"/>
-    <circle cx="256" cy="180" r="3"/>
-    <circle cx="256" cy="332" r="3"/>
-  </g>
-
-  <!-- Outer nodes -->
-  <g fill="#0f172a" stroke="#0ea5e9" stroke-width="3">
-    <circle cx="160" cy="160" r="24"/>
-    <circle cx="352" cy="160" r="24"/>
-    <circle cx="160" cy="352" r="24"/>
-    <circle cx="352" cy="352" r="24"/>
-    <circle cx="140" cy="256" r="20"/>
-    <circle cx="372" cy="256" r="20"/>
-    <circle cx="256" cy="140" r="20"/>
-    <circle cx="256" cy="372" r="20"/>
-  </g>
-
-  <!-- Inner node fills -->
-  <g fill="#22d3ee">
-    <circle cx="160" cy="160" r="10"/>
-    <circle cx="352" cy="160" r="10"/>
-    <circle cx="160" cy="352" r="10"/>
-    <circle cx="352" cy="352" r="10"/>
-    <circle cx="140" cy="256" r="8"/>
-    <circle cx="372" cy="256" r="8"/>
-    <circle cx="256" cy="140" r="8"/>
-    <circle cx="256" cy="372" r="8"/>
-  </g>
-
-  <!-- Center hub (phone) -->
-  <circle cx="256" cy="256" r="56" fill="#0f172a" stroke="#0ea5e9" stroke-width="4"/>
-  <circle cx="256" cy="256" r="40" fill="#0ea5e9"/>
-
-  <!-- Signal bars in center -->
-  <g fill="#0f172a">
-    <rect x="236" y="268" width="8" height="16" rx="2"/>
-    <rect x="248" y="258" width="8" height="26" rx="2"/>
-    <rect x="260" y="248" width="8" height="36" rx="2"/>
-    <rect x="272" y="238" width="8" height="46" rx="2"/>
-  </g>
+  <!-- Laptop -->
+  <rect x="312" y="196" width="128" height="88" rx="12" fill="#1e293b"/>
+  <rect x="322" y="206" width="108" height="64" rx="4" fill="#ffffff"/>
+  <rect x="300" y="288" width="152" height="14" rx="4" fill="#1e293b"/>
 </svg>