changed poll and some UI bugs.

deploy/install-agent.sh

@@ -27,6 +27,18 @@ need_cmd() {
   command -v "$1" >/dev/null 2>&1 || fail "Required command not found: $1"
 }
 
+node_major_version() {
+  node -p "Number(process.versions.node.split('.')[0])"
+}
+
+check_node_version() {
+  need_cmd node
+  major=$(node_major_version)
+  if [ "$major" -lt 22 ]; then
+    fail "Node.js 22.5 or newer is required. Found: $(node -v). Install a current Node.js release and rerun this installer."
+  fi
+}
+
 as_root() {
   if [ "$(id -u)" -eq 0 ]; then
     "$@"
@@ -177,6 +189,7 @@ configure_env() {
 
 install_dependencies() {
   need_cmd npm
+  check_node_version
   log "Installing agent dependencies..."
   if [ -f "$AGENT_DIR/package-lock.json" ]; then
     npm --prefix "$AGENT_DIR" ci --omit=dev