Does a divorced woman deserve the value of the furniture at today's price or at its price when it was agreed upon, if part of the Mahr (dowry) was gold that was purchased, and the other part was furniture that was not purchased, keeping in mind that the same Mahr included gifts from the father to his sister?

The common practice in Egypt is for the list of movables (furniture and other items) to be part of the mahr (dowry). There is no harm in this as long as custom dictates it. The furniture listed in the inventory but not yet purchased is considered a deferred mahr, and upon separation, the husband is obligated to return it as specified in the inventory and in a manner befitting the wife. He cannot be compelled to pay its value unless he agrees. If the wife desires the value and the husband agrees, they must reach a mutual agreement on that. They should agree on the value of the furniture at current prices. If they do not agree, the husband must hand over the furniture without paying its value.