Question juridique clé
Whether the appeal against the cantonal order is admissible when it challenges only costs and no irreparable harm is alleged.
Solution extraite
The appeal is inadmissible because the accessory costs ruling in an incidental decision can only be attacked immediately together with the principal incidental ruling; absent that, review is reserved for the final decision, and no irreparable harm was shown.
Motifs extraits
The appellants did not contest the recusal ruling itself, only the allocation of costs and refusal of party costs. Under the Federal Supreme Court's case law and Art. 93(3) LTF, such accessory costs issues cannot be reviewed immediately unless the conditions for an appeal against an incidental decision are met.