ui_migration lint(style) Add LINT and PURGE to CSS LESS all over WEBAPP

webapp/package.json

@@ -28,6 +28,7 @@
   },
   "devDependencies": {
     "@babel/eslint-parser": "^7.28.5",
+    "@fullhuman/postcss-purgecss": "^8.0.0",
     "@vitejs/plugin-vue": "^6.0.6",
     "@vue/eslint-config-prettier": "9.0.0",
     "autoprefixer": "^10.4.24",
@@ -38,7 +39,11 @@
     "eslint-plugin-vue": "^9.20.0",
     "less": "^4.5.1",
     "material-symbols": "^0.39.1",
+    "postcss-html": "^1.8.1",
+    "postcss-less": "^6.0.0",
     "prettier": "^3.2.8",
+    "stylelint": "^17.11.0",
+    "stylelint-config-standard": "^40.0.0",
     "typescript-eslint": "^8.59.0",
     "vite": "^7.3.1"
   },