fix: use official favicon.svg logo for all PWA and app icons

Regenerates icon-192.png, icon-512.png, apple-touch-icon.png, and
favicon-32.png from the official iNTERCEPT logo (favicon.svg) instead
of the placeholder icon.svg. Also replaces icon.svg with the official
logo so the SVG manifest entry is consistent.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

static/icons/icon.svg

@@ -1,21 +1,20 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
-  <rect width="512" height="512" fill="#0b1118" rx="80"/>
+  <!-- Background -->
-  <!-- Signal wave arcs radiating from center-left -->
+  <rect width="100" height="100" fill="#0a0a0f"/>
-  <g fill="none" stroke="#4aa3ff" stroke-linecap="round">
+
-    <!-- Inner arc -->
+  <!-- Signal brackets - left side -->
-    <path stroke-width="22" d="M 160 256 Q 192 210 192 256 Q 192 302 160 256" opacity="0.5"/>
+  <path d="M15 30 Q5 50, 15 70" stroke="#00d4ff" stroke-width="4" fill="none" stroke-linecap="round" opacity="0.5"/>
-    <!-- Small arc -->
+  <path d="M22 35 Q14 50, 22 65" stroke="#00d4ff" stroke-width="3.5" fill="none" stroke-linecap="round" opacity="0.7"/>
-    <path stroke-width="22" d="M 130 256 Q 180 185 180 256 Q 180 327 130 256" opacity="0.65"/>
+  <path d="M29 40 Q23 50, 29 60" stroke="#00d4ff" stroke-width="3" fill="none" stroke-linecap="round"/>
-    <!-- Medium arc -->
+
-    <path stroke-width="24" d="M 100 256 Q 175 155 175 256 Q 175 357 100 256" opacity="0.8"/>
+  <!-- Signal brackets - right side -->
-    <!-- Large arc -->
+  <path d="M85 30 Q95 50, 85 70" stroke="#00d4ff" stroke-width="4" fill="none" stroke-linecap="round" opacity="0.5"/>
-    <path stroke-width="26" d="M 68 256 Q 170 120 170 256 Q 170 392 68 256" opacity="0.95"/>
+  <path d="M78 35 Q86 50, 78 65" stroke="#00d4ff" stroke-width="3.5" fill="none" stroke-linecap="round" opacity="0.7"/>
-  </g>
+  <path d="M71 40 Q77 50, 71 60" stroke="#00d4ff" stroke-width="3" fill="none" stroke-linecap="round"/>
-  <!-- Horizontal beam line -->
+
-  <line x1="190" y1="256" x2="420" y2="256" stroke="#4aa3ff" stroke-width="20" stroke-linecap="round"/>
+  <!-- The 'i' letter -->
-  <!-- Signal dot at origin -->
+  <circle cx="50" cy="22" r="7" fill="#00ff88"/>
-  <circle cx="190" cy="256" r="18" fill="#4aa3ff"/>
+  <rect x="43" y="35" width="14" height="45" rx="2" fill="#00d4ff"/>
-  <!-- Target reticle at end -->
+  <rect x="36" y="35" width="28" height="5" rx="1" fill="#00d4ff"/>
-  <circle cx="420" cy="256" r="28" fill="none" stroke="#4aa3ff" stroke-width="14"/>
+  <rect x="36" y="75" width="28" height="5" rx="1" fill="#00d4ff"/>
-  <circle cx="420" cy="256" r="8" fill="#4aa3ff"/>
 </svg>