In the Ms. Marvel comics, Kamran is indeed considered a villain. He gets involved in schemes that cause trouble for the heroes and works against their goals.
Definitely not. Ms. Marvel's powers weren't a result of being a mutant. Instead, her powers were attributed to unique circumstances or incidents within the comic's narrative.
Ms. Marvel isn't a Djinn. Her abilities and background are distinct from those of a Djinn. She gains her powers through other means and has a separate comic narrative.
In certain comic universes, Ms. Marvel is indeed classified as a mutant. This is often determined by specific plot developments and character backstories.