Is selling shared property for the purpose of personal spending considered theft, especially with the partner's refusal to divide the inheritance or provide maintenance?

Your brother does not have the right to restrict you, and you have the right to dispose of your money. Your sale of the aforementioned refrigerator—which is part of the inheritance—without the consent of the heirs is a mistake and an encroachment upon others' property. You must guarantee it. You have the right to take your share of the inheritance through division or mutual agreement.