Questione giuridica chiave
Whether the public-law appeal was admissible against the cantonal expulsion judgment and earlier cantonal decisions.
Decisione estratta
The appeal was admissible only against the cantonal administrative court judgment; the earlier migration office and departmental decisions could not be directly annulled.
Motivazione estratta
Only the last cantonal judicial decision is directly challenged before the Federal Supreme Court; the prior administrative acts are merely contested in substance. The hardship-permit argument also fell within the statutory exclusion for deviations from admission requirements.