Surface snapper snapshots from the desktop: `nomarchy-menu snapshot` (in the
SUPER+M picker, self-gated) launches btrfs-assistant, the polkit-aware
browse/diff/restore/rollback UI -- safer than a fat-fingerable rofi rollback
for a destructive root-only op. Shipped system-side gated on
nomarchy.system.snapper.
Also snapshot /home by default (hourly 5 / daily 7 / weekly 4) when it's its
own BTRFS subvolume -- the installer only set up snapper for /. A boot
oneshot creates the required /home/.snapshots subvolume if missing, so
already-installed machines get it too (no disko change).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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