chroe: add demo mode

web/package.json

@@ -4,6 +4,8 @@
   "private": true,
   "scripts": {
     "dev": "vite",
+    "demo": "vite --mode demo",
+    "build:demo": "vite build --mode demo",
     "build": "vite build",
     "preview": "vite preview",
     "lint": "eslint . --ext .vue,.js,.jsx,.cjs,.mjs --fix --ignore-path .gitignore",
@@ -25,6 +27,7 @@
     "@rushstack/eslint-patch": "^1.3.3",
     "@vitejs/plugin-vue": "^4.4.0",
     "@vue/eslint-config-prettier": "^8.0.0",
+    "cross-env": "^7.0.3",
     "eslint": "^8.49.0",
     "eslint-plugin-vue": "^9.17.0",
     "prettier": "^3.0.3",