refactor: 添加移动端适配和路由中间件

package.json

@@ -20,6 +20,7 @@
     "nuxt": "^3.18.1",
     "pdfjs-dist": "^5.4.54",
     "pinia": "^3.0.3",
+    "postcss-px-to-viewport": "^1.1.1",
     "qrcode.vue": "^3.6.0",
     "vue": "^3.5.18",
     "vue-pdf-embed": "^2.1.3",
@@ -32,7 +33,9 @@
     "@pinia-plugin-persistedstate/nuxt": "^1.2.1",
     "@types/prettier": "^3.0.0",
     "@unocss/nuxt": "^66.4.2",
+    "@vant/nuxt": "^1.0.7",
     "element-plus": "^2.10.7",
+    "postcss": "^8.5.6",
     "prettier": "3.6.2",
     "sass": "^1.90.0",
     "unocss": "^66.4.2"