v1.2.36: 添加favicon图标，修复icons目录缺失问题

frontend/index.html

@@ -4,10 +4,10 @@
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
   <meta name="apple-mobile-web-app-capable" content="yes">
-  <title>甲辰收藏 v1.2.35</title>
+  <title>甲辰收藏 v1.2.30</title>
   
   <!-- Favicon -->
-  <link rel="icon" type="image/x-icon" href="/static/icons/favicon.ico" />
+  <link rel="icon" type="image/png" href="/static/icons/favicon.png" />
   <link rel="apple-touch-icon" href="/static/icons/apple-touch-icon.png" />
   <style>
     * { margin: 0; padding: 0; box-sizing: border-box; }