Question juridique clé
Whether the subsidiary constitutional appeal was admissible, including timeliness and sufficient reasoning
Solution extraite
The appeal was manifestly inadmissible because its reasoning did not address the cantonal decision of inadmissibility; the timeliness issue was left open.
Motifs extraits
The appellant only challenged the merits of the residence-permit refusal and described his study plans, but did not engage with the challenged inadmissibility ruling; the filing was also unsigned.