When taffybar is started via systemd --user, the manager environment can keep WAYLAND_DISPLAY/HYPRLAND_INSTANCE_SIGNATURE from an older Wayland session even when we're currently running an X11 xmonad session.
This causes taffybar's backend detection to select the Wayland backend, which prevents X11 struts from being applied and leads to incorrect placement.
Add a small wrapper backend detector that checks for an actual wayland socket and, if missing, sanitizes the env so taffybar's internal context uses the X11 backend.
Ivan Malison
bfba9f58d0