修复局域网连接返回为null问题

frontend/public/favicon.svg

@@ -0,0 +1,25 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
+  <defs>
+    <linearGradient id="bg" x1="0%" x2="100%" y1="0%" y2="100%">
+      <stop offset="0%" stop-color="#1f7ae0" />
+      <stop offset="100%" stop-color="#5db1ff" />
+    </linearGradient>
+  </defs>
+  <rect width="64" height="64" rx="16" fill="url(#bg)" />
+  <path
+    d="M20 39.5a10 10 0 0 1 1.6-19.87A13.5 13.5 0 0 1 47 24.5a8.5 8.5 0 1 1-1.2 16.9H36"
+    fill="none"
+    stroke="#fff"
+    stroke-linecap="round"
+    stroke-linejoin="round"
+    stroke-width="4"
+  />
+  <path
+    d="M32 46V28m0 0-7 7m7-7 7 7"
+    fill="none"
+    stroke="#fff"
+    stroke-linecap="round"
+    stroke-linejoin="round"
+    stroke-width="4"
+  />
+</svg>