Add new icons and message helpers; introduce get_active_logfile and enhance silent() to redirect output to a proper log file (BUILD_LOG or /tmp fallback), preserve/propagate exit codes, temporarily disable traps while running commands, source explain_exit_code for human-friendly error explanations, and show the last 10 log lines on failure. Also sanitize keys when unsetting MSG_INFO_SHOWN to avoid ANSI/control-char issues, add msg_warn and fatal helpers, and make msg_custom skip empty messages. These changes improve observability and robustness of VM creation scripts and error reporting.
Add informative status messages and improve image customization flow: install base packages and Docker during virt-customize, enable Docker service, and configure /etc/docker/daemon.json (sets DOCKER_PREINSTALLED on success). Add finalization messages while setting hostname and SSH config. For images without cloud-init, add systemd drop-ins to enable root autologin on serial-getty@ttyS0 and getty@tty1. Also add a trailing newline to nginx-ui.json.
Collapse duplicated qm set invocation into a single call when attaching the EFI and root disk, removing the duplicate conditional block. Also stop redirecting setup_cloud_init output (remove >/dev/null 2>&1) so Cloud-Init setup logs and errors are visible for debugging. Note: the previous conditional added a --scsi1 "${STORAGE}:cloudinit" only when USE_CLOUD_INIT=yes; that explicit scsi1 assignment is no longer present in this unified call.
