Is it permissible for a father to grant his daughter a portion of his wealth (salary, land, or an apartment) during his lifetime, and how can he guarantee his wife's right to inheritance beyond her legal share (such as by bequeathing half of the house or land to her)?

There is no objection to giving a daughter or wife a portion of one's salary or property as an immediate gift or donation. There is no need to equalize it with other relatives. However, a bequest to an heir is not permissible, nor is it permissible to intend to deprive heirs through a gift.