fix: install whiptail if not present for interactive prompts in setup script

scripts/setup.sh

@@ -24,6 +24,17 @@ if [ "$(id -u)" -ne 0 ]; then
   exit 1
 fi
 
+# Ensure interactive prompt tooling is available
+if ! command -v whiptail > /dev/null 2>&1; then
+  echo "Installing whiptail for interactive prompts..."
+  if command -v apt-get > /dev/null 2>&1; then
+    apt-get update -y
+    DEBIAN_FRONTEND=noninteractive apt-get install -y whiptail
+  elif command -v pacman > /dev/null 2>&1; then
+    pacman -S --noconfirm whiptail
+  fi
+fi
+
 # Detect user
 REAL_USER=${SUDO_USER:-$(logname)}
 REAL_HOME=$(eval echo "~$REAL_USER")