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.
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