fix yarn

ct/nginxproxymanager.sh

@@ -50,6 +50,11 @@ function update_script() {
     sed -i "s|\"version\": \"0.0.0\"|\"version\": \"$RELEASE\"|" backend/package.json
     sed -i "s|\"version\": \"0.0.0\"|\"version\": \"$RELEASE\"|" frontend/package.json
     cd ./frontend || exit
+    # Remove yarn.lock to force fresh dependency resolution
+    rm -f yarn.lock
+    # Replace node-sass with sass (Dart Sass) for Node.js compatibility
+    $STD yarn remove node-sass 2>/dev/null || true
+    $STD yarn add -D sass
     $STD yarn install --network-timeout 600000
     $STD yarn build
   )