feat: add minification step for JavaScript files in build process

package.json

@@ -14,6 +14,7 @@
     "test:quick": "npm run build && node quick-test.js",
     "test:ui": "npm run test:interactive",
     "build": "node build-simple.js",
+    "build:dev": "cross-env SKIP_MINIFY=true node build-simple.js",
     "dev": "node dev-server.js",
     "dev:build": "npm run build && npm run dev",
     "watch": "nodemon",
@@ -27,8 +28,10 @@
     "@types/node": "^24.0.1",
     "concurrently": "^8.2.2",
     "cors": "^2.8.5",
+    "cross-env": "^7.0.3",
     "express": "^4.21.2",
     "nodemon": "^3.1.10",
+    "terser": "^5.43.1",
     "typescript": "^5.8.3"
   },
   "dependencies": {