Problem: enabled() only checked for the 'ghostty' filetype, but many
users have ghostty config files detected as 'config' or with no
filetype set. These users got no completions.
Solution: check canonical ghostty config directories
($XDG_CONFIG_HOME/ghostty, ~/.config/ghostty, /etc/ghostty) when the
filetype is 'config' or empty, resolving symlinks to handle indirect
paths.