test(install): quiet smoke npm output

scripts/docker/install-sh-common/cli-verify.sh

@@ -19,7 +19,7 @@ verify_installed_cli() {
   fi
 
   if [[ -z "$cmd_path" ]]; then
-    npm_root="$(npm root -g 2>/dev/null || true)"
+    npm_root="$(quiet_npm root -g 2>/dev/null || true)"
     if [[ -n "$npm_root" && -f "$npm_root/$package_name/dist/entry.js" ]]; then
       entry_path="$npm_root/$package_name/dist/entry.js"
     fi

scripts/docker/install-sh-common/version-parse.sh

@@ -12,3 +12,13 @@ extract_openclaw_semver() {
   )"
   printf '%s' "${parsed#v}"
 }
+
+quiet_npm() {
+  npm \
+    --loglevel=error \
+    --no-update-notifier \
+    --no-fund \
+    --no-audit \
+    --no-progress \
+    "$@"
+}