feat: optimize source project pages and SEO

ruoyi-ui/public/index.html

@@ -6,7 +6,8 @@
     <meta name="renderer" content="webkit">
     <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
     <link rel="icon" href="<%= BASE_URL %>favicon.ico">
-    <title><%= webpackConfig.name %></title>
+    <title>南音源码库 - Java、Python、前端项目源码与开发教程</title>
+    <meta name="description" content="南音源码库提供 Java、Python、Vue 等项目源码、开发教程、运行说明和技术文档，帮助开发者学习与快速搭建项目。">
     <!--[if lt IE 11]><script>window.location.href='/html/ie.html';</script><![endif]-->
 	  <style>
     html,