Three papercuts hit when creating a VM from the menu:
1. Disk size "30" was passed verbatim to qemu-img resize, which read it
as 30 BYTES and failed ("use --shrink"). The prompt now shows units
(e.g. 30G, 1T) and a bare number is normalised to GB ("30" -> "30G"),
in the menu and in deploy_qemu.py itself.
2. The VM name is no longer required: leaving it blank uses the default
erplibre-<distro>-<version> (e.g. erplibre-ubuntu-2604). Distro and
version are now asked first so the default can be offered.
3. The menu ignored the deploy exit code and carried on to "wait for the
VM IP" even after a failure, hanging forever with the error scrolled
off. It now checks the return code and stops with a clear message.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Mathieu Benoit
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