feat: refine and finalize redesign

public/favicon.svg

@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
+  <!-- Main horizontal line -->
+  <path d="M 4 10 L 28 10" fill="none" stroke="currentColor" stroke-width="2"/>
+
+  <!-- Branch line: down from left, curve, up to right -->
+  <path d="M 8 10 L 8 16 Q 8 22 16 22 Q 24 22 24 16 L 24 10"
+        fill="none" stroke="currentColor" stroke-width="2"/>
+
+  <!-- Left dot on main line -->
+  <circle cx="8" cy="10" r="3" fill="currentColor"/>
+
+  <!-- Right dot on main line -->
+  <circle cx="24" cy="10" r="3" fill="currentColor"/>
+
+  <!-- Middle dot on branch -->
+  <circle cx="16" cy="22" r="3" fill="currentColor"/>
+</svg>