The enclosure looks a bit small. For female veileds, it's recommended to have a 18x18x36 at minimum. Of course, she isn't fully grown (as far as I can see with the picture) so a larger cage is going to be needed within a couple of months, maybe less. How old is she? Or what size is she?
For the lighting, you need a UVB and a basking light for heat. You have to measure the basking temps for the chameleon. For females, it's lower so that they don't produce a large amount of eggs. Speaking of eggs, you have to be prepared when she is going to lay them. For that, you need a laying bin with soil or washed playsand. I've never had a female, but you can search laying bin methods on here.
They don't exactly get bored, they are solitary reptiles. Other animals could stress her out.
I personally don't think you need a humidifier for a veiled unless you live in an extremely dry place (like the SW of the US). It's better to spray the cage and measure the humidity. 55% at the driest part of the day, 60-70% most times, and up to 80-85% when you mist. Constant high humidity can cause an upper respiratory infection.