Question juridique clé
Whether the appeal against the cantonal procedural order was admissible under Art. 93 BGG.
Solution extraite
The conditions for immediate review of an interim decision were not met; the appeal was inadmissible.
Motifs extraits
No irreparable legal disadvantage was shown, because the appellant could still challenge a later final decision and would not be forced into litigation without procedural choice. Nor would immediate admission avoid significant time or cost in a voluminous evidentiary procedure, since only the second-home use remained disputed.