Snapshots panel was non-functional (wrong snapper flag); breadgreet picked
the wrong session .desktop and skipped bos-session's PATH fixup; Calamares
aborted offline installs over an unnecessary packages module; snapshot
rollback silently no-op'd on BOS's pinned-subvolume layout (now points at
grub-btrfs instead); breadcrumbs was configurable but had no daemon to run
it. Also: SUPER+I double-bind, breadpaper/packages panels blocking the GTK
main thread, dead polkit rule, and a sweep of smaller drift (default
sidebar view, stale wording, missing .desktop launchers, wallpaper daemon
not recording its own default).
New users get a one-time welcome window on first boot (self-gating marker,
skipped for the live/installer user) and a keybind cheatsheet on SUPER+/.
Also bind BOS Settings to SUPER+, (it had no launcher bind). Both popups
are floated/centred via window rules. Addresses the onboarding/
discoverability gap from external review.
