refactor

package.json

@@ -5,6 +5,8 @@
   "main": "main.js",
   "scripts": {
     "build": "vite build",
+    "build:dev": "cross-env NODE_ENV=development vite build --mode development",
+    "watch:build": "onchange \"features/**/*.js\" \"utils/**/*.js\" \"page/**/*.js\" \"main.js\" \"background.js\" -- npm run build:dev",
     "dev": "vite dev",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
@@ -14,6 +16,8 @@
   "description": "",
   "devDependencies": {
     "@vitejs/plugin-legacy": "^6.1.1",
+    "cross-env": "^10.1.0",
+    "onchange": "^7.1.0",
     "vite": "^6.3.6",
     "vite-plugin-web-extension": "^4.4.5"
   },