Questione giuridica chiave
Whether the father's filing could be treated as a constitutional complaint rather than an inadmissible appeal.
Decisione estratta
The filing was accepted as a constitutional complaint because its form and timing met the requirements and it alleged a denial of justice.
Motivazione estratta
Although ordinary appeal was unavailable against a non-final provisional custody measure, the submission satisfied the formal requirements for a constitutional complaint and was filed against a final cantonal decision within time.