Our daughter dislikes the heat too, she has mild excema which means she gets really itchy when hot & sweaty.
That being said we try to keep her in non-airconditioned rooms as much as possible except when it gets really humid. Now I am not being sadistic, but rather the thought is that doing this she will aclimatize to the heat. I mean you can’t live indoors all summer…
We have both ceiling fans and floor fans to keep a nice cool (somewhat) breeze blowing, as well as the windows open. Should also try to stop direct sunlight comming into the room to keep it cooler.
Don’t use western baby clothes, these are generally thicker and hence trap more heat, local cheap flimsy breaths better and will feel cooler. Alternativy just wear a diper around the house.
Strangly hot drinks rather than cold help too, during drinking she will sweat, but after when she is warm the ambient temperature will feel cooler (some kind of Chinese logic), of course if she sweats dry her hair otherwise with the fans blowing she could catch a cold!