Question juridique clé
Whether Y.________ SA was directly bound by an oral contract for additional electrical works on villa H.
Solution extraite
No direct contract was shown; the oral requests could reasonably be understood as ratification by A.________ Sàrl under the contractual setup already in place.
Motifs extraits
On the factual findings, Z.________ acted as director of Y.________ SA, but the requests were made on site in the presence of the architect representing A.________ Sàrl. Given the existing contract, which reserved change orders to A.________ Sàrl, and the prior course of dealing, the confidence principle did not allow X.________ SA to infer a direct contract with Y.________ SA.