Question juridique clé
Whether the federal appeal against the cantonal detention decision was admissible and whether the appellant had an current interest.
Solution extraite
The appeal was admissible because the challenged prolongation rested on the same detention grounds as the later order, so the appellant retained a practical interest.
Motifs extraits
A later detention order had replaced the earlier one, but both relied on the same grounds; therefore the federal court could still review the complaints.