Function wan_instance_display_label 

pub fn wan_instance_display_label(
    host_hint: &str,
    verified_instance_id: &str,
) -> String

The label a human sees for a verified instance: <host_hint>~<id8> (§2.6). The suffix comes from the id the chain proved, never from the sender’s own label, so two instances claiming the same hostname still render differently.