And then push it back onto the Membrane that it was once attached to the reality is that you are looking at replacing the Keyboard.
Sorry that's the best I can suggest here as when things like this happen I've always had to replace the Keyboard. If this is your personal NB you can use a USB Keyboard & Mouse without any issues though they are not very portable but on the other hand you are less likely to get RSI with a Full Sized keyboard than the Smaller NB ones that come with every NB.
Short of de-clawering the cat or better still getting rid of it all together it's also likely to happen again. Cat Owners really amuse me I remember one who made Wedding Dresses and these where High End Expensive ones who allowed her cat to lie all over the Material used to make the dresses and complained bitterly when her cats tail got caught in the drive belt of her Bernina Industrial that she used to sew the wedding dresses. When she first got the Machine she insisted that the Belt Guard be got rid of as it damaged the Table when she tipped the machine back but when it amputated part of her cats tail it had to be replaced. Only problem was that she threw hers out and didn't see why she should pay for another one. :D
Or more recently a Cat Owner who had a Prize Persian got all upset when I covered it with Food Dye because it used to go under my house and Pi$$ on all my properity. Apparently she was allowed to put it out at night allow it to do as it pleased and no one had a right to complain or worse cover it with Green Food Dye 3 days prior to a Cat Show. I just suggested that if the cat was so valuable maybe it was a bad idea to let it out of her control. After all not every one liked cats the same as she did and overall a bit of colour was nothing compared to what could have happened to it. Several weeks latter it turned up at the Local RSPCA after being trapped and handed in. So apparently I wasn't the only one who it was upsetting.
Over here there is a guy who turns Feral Cats into Hats and that is a very good outcome for them but with Domestic Cats most of their owners see things a bit differently.
Col