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/index.html

@@ -4,10 +4,10 @@
   <meta charset="UTF-8">
   <title>IMC益选便利店营业额数据看板</title>
   <meta name="viewport" content="width=device-width,initial-scale=1">
-  <link href="https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css" rel="stylesheet">
-  <script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.0/dist/chart.umd.min.js"></script>
-  <script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-datalabels@2.2.0"></script>
-  <script src="https://cdnjs.cloudflare.com/ajax/libs/chartjs-plugin-zoom/2.2.0/chartjs-plugin-zoom.min.js"></script>
+  <link href="/static/vendor/tailwind.min.css" rel="stylesheet">
+  <script src="/static/vendor/chart.umd.min.js"></script>
+  <script src="/static/vendor/chartjs-plugin-datalabels.min.js"></script>
+  <script src="/static/vendor/chartjs-plugin-zoom.min.js"></script>
   <style>
     :root {
       --primary: #22d3ee; /* cyan-400 */