/etc/zshrc renders promptInit and environment.shellAliases after
interactiveShellInit, so both overrode the shared zshrc: the prompt
became `prompt suse` and ls/ll/l fell back to coreutils. The plugin
sourcing in the zshrc points at the Arch path /usr/share/zsh/plugins
and silently found nothing.
Clear promptInit, drop the three aliases with null, and enable the
syntax-highlighting and autosuggestions modules.
nevaforget
a5d6c3eb77