SMBSettings + SMBShare registry in settings (password never stored — only UserSet);
NetBIOS-safe name validation. Pure infra renderers: RenderSambaConfig (hardened
global block: SMB2 floor, bind interfaces only=lo eth0, disable netbios=no, force
user block) + RenderSambaCompose (network_mode host, pinned image, :ro bind for
read-only shares, passdb volume). Exact smb.conf golden + CRUD/validation tests.
