调整部分前端布局和后端增删改逻辑

shierfeng-fastapi-frontend/index.html

@@ -6,7 +6,8 @@
   <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
   <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">
+  <link rel="icon" type="image/svg+xml" href="/sylvan-mark.svg">
+  <link rel="alternate icon" href="/favicon.ico">
   <title>%VITE_APP_TITLE%</title>
   <!--[if lt IE 11]><script>window.location.href='/html/ie.html';</script><![endif]-->
   <style>
@@ -212,4 +213,4 @@
   <script type="module" src="/src/main.js"></script>
 </body>
 
-</html>
+</html>