优化index页面标题读取配置

index.html

@@ -7,7 +7,7 @@
   <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="/favicon.ico">
-  <title>若依管理系统</title>
+  <title>%VITE_APP_TITLE%</title>
   <!--[if lt IE 11]><script>window.location.href='/html/ie.html';</script><![endif]-->
   <style>
     html,