Is it permissible for a woman to pray over the deceased in the Haram or the mosque if the call to prayer for it is made, and is a woman's prayer over the deceased reprehensible (makruh)?

It is permissible for a woman to pray over a deceased person, whether in the Haram (Grand Mosque) or elsewhere. There is no dislike (makrooh) in this; rather, it is recommended (mustahabb). What is disliked for her is following funerals and frequently visiting graves.