fix: prevent accidental rebuild-cluster in CI by defaulting to 'none' when kubeconfig is missing

.gitea/workflows/homelab-main.yml

@@ -202,7 +202,8 @@ jobs:
                 exit "${version_status}"
               fi
             else
-              action_command="rebuild-cluster"
+              echo "No kubeconfig found; skipping actual execution (CI mode)."
+              action_command="none"
             fi
           fi
 
@@ -211,6 +212,9 @@ jobs:
               echo "Running jeannie ${action_command}"
               "${deploy_dir}/jeannie" "${action_command}"
               ;;
+            none)
+              echo "Deployment skipped: Code pushed to bootstrap, but no credentials found for cluster execution."
+              ;;
             *)
               echo "Unsupported HOMELAB_ACTION_COMMAND: ${action_command}" >&2
               exit 1