Welcome to TCS! Sorry your post almost incited a riot, though. Declawing is a sensitive issue for most of us, so I hope you're not offended.
My Callie was declawed, but she was already declawed when she adopted me. She was a life-long nipper when she got overstimulated, too. I think what you've seen is that when you brought Haya home, she was scared and in a new environment, so she was all lovey and "good". After becoming acclimated, having surgery, and coming back home, she's now showing you all her kittenness! I think most of what you're seeing is normal behavior.
I have an 8 mo old kitty and there are only certain times I can pet him without him "attacking" my hands. He's in play mode when he's attacking and ANYTHING is a toy. When he's sleepy, just woken up, and just hanging out are okay times for me to pet him. When he's playing, on the prowl for some toy to attack, or hungry are not good times to try to get him all snuggly and love on him. So, take it slow and take cues from Haya on when she says it's okay to love on her. Know that most kitties, as they mature and get older, will calm down and will accept being petted better and at more times.
Get some dangly toys, toys on a stick, a laser pointer, some soft balls or a mouse, and a toy called DaBird. When she's kinda reaching for you to scratch at you, divert her attention to a toy. I think she's wanting to play and rough house with you, like she would do with another kitty. Kitties that age still like to wrestle and jump all over each other. Of course, another kitty for her to play with would be a great diversion!

If she does happen to snag you, don't strike out at her or yell at her. An over dramatic "Owwwwwwwwww!" usually conveys that they've hurt you. If she bites, tell her sternly "NO!" (again, not yelling, but use a firm voice) and GENTLY push into her until she releases. Cat's expect their "prey" to try to run away, so they clench down. Gently pushing towards her is unexpected and she should lessen her hold on you.
Also, know that some kitties don't like to have their tummies rubbed. Trying to do so will leave you with battle scars. Neither of my current kitties like having their tummies rubbed, so I don't even try.