Questione giuridica chiave
Was the chalet construction contract concluded with Y. personally or with Z. Sàrl?
Decisione estratta
The contract was concluded with Z. Sàrl, not with Y. personally.
Motivazione estratta
The trust principle could not override the cantonally established actual intent and factual finding that X. instructed Z. Sàrl to build the chalet; those findings are binding on reform appeal.