Is the yellow discharge that came from me with menstrual pains and two days before the start of menstruation considered maniyy (seminal discharge) that necessitates ghusl (ritual bath), or is it ṣufrah (yellowish discharge) and kudrah (brownish discharge) that do not necessitate it?

This yellow discharge, accompanied by the known signs of menstruation, is "al-sufrah" (yellowish discharge), and it is considered part of menstruation. Therefore, the woman has the ruling of a menstruating woman; she abstains from prayer and fasting, and everything that is forbidden for a menstruating woman is forbidden for her.