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

webapp/stylelint.config.mjs

@@ -0,0 +1,23 @@
+// stylelint.config.mjs
+export default {
+  extends: ["stylelint-config-standard"],
+
+  overrides: [
+    {
+      files: ["**/*.vue"],
+      customSyntax: "postcss-html",
+    },
+    {
+      files: ["**/*.less"],
+      customSyntax: "postcss-less",
+    },
+  ],
+
+  rules: {
+    // UIKit class naming doesn't match Stylelint's default class pattern
+    "selector-class-pattern": null,
+    // Less @import is fine
+    "no-invalid-position-at-import-rule": null,
+    "no-empty-source": null,
+  },
+};