What is the ruling of the Sharia on a husband who denies his wife's favor to him, seizes her money, and does not restore her rights, especially when his family incites him to do so and interferes in their marital life?

What you paid for the apartment is either a loan or a partnership, and you have the right to claim it, or it is a gift and a donation. The original ruling for a gift is that it is forbidden to revoke it, except for a gift from a father to his child.

The Hanbalis have made an exception for a gift intended as compensation, such as a woman who gifted something to her husband at his request. She is permitted to revoke it if he harms her by divorce or by marrying another, as the reason for the gift—which was to avert harm—is no longer present.

Similarly, the Malikis hold that if she gifted something to her husband with the intention of maintaining their companionship, and he hastened to divorce her, she has the right to revoke the gift.

In summary: The wife has the right to claim her agreed-upon share in the house, and she has the right to revoke what she gifted him at his request, or with the intention of maintaining companionship if that intention is no longer fulfilled. It is advisable to try to resolve the dispute amicably first.