Is what happens to a woman, in terms of feeling pleasure and clitoral movement during sleep, with partial regaining of consciousness but without the presence of fluid, considered masturbation or unlawful, and is ghusl (ritual bathing) required upon waking?

A sleeping person is not held accountable for what occurs in their sleep. However, they are held accountable for what happens while awake. Masturbation (al-istimna') is forbidden. Ghusl (ritual bath) is only required upon seeing fluid, based on the Prophet's (peace be upon him) saying: "Yes, if she sees the fluid."