fix(frontend): 前端静态资源本地化，解决手机端 CDN 加载失败白屏问题

frontend/admin.html

@@ -4,7 +4,7 @@
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width,initial-scale=1">
   <title>数据修正 - IMC益选便利店</title>
-  <link href="https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css" rel="stylesheet">
+  <link href="/static/vendor/tailwind.min.css" rel="stylesheet">
   <style>
     :root {
       --primary: #22d3ee; /* cyan-400 */