Improve ISO installer non-GPU and bundled setup flow

autoinstall/firstboot-setup.sh

@@ -169,18 +169,22 @@ echo ""
 
 # Write selected tools to a config file so install.sh can read it
 mkdir -p /opt/cezen
-cat > /opt/cezen/install.conf << EOF
-TIER=${TIER}
 SKIP_ROLES=""
-EOF
-
-# Determine which roles to skip based on tool selection
 for role in ollama jupyterlab chromadb vllm mlflow minio monitoring k3s; do
   if ! echo "$TOOLS" | grep -q "$role"; then
-    sed -i "s/SKIP_ROLES=\"\"/SKIP_ROLES=\"${role}\"/" /opt/cezen/install.conf
+    if [ -n "$SKIP_ROLES" ]; then
+      SKIP_ROLES="${SKIP_ROLES},${role}"
+    else
+      SKIP_ROLES="${role}"
+    fi
   fi
 done
 
+cat > /opt/cezen/install.conf << EOF
+TIER=${TIER}
+SKIP_ROLES=${SKIP_ROLES}
+EOF
+
 # Mark as configured so this wizard doesn't run again
 touch /opt/cezen/.setup-done