spend the next couple of months documenting. get some advice on the basis of what you gather. if it looks like you've got a case going, find a new job, then sue and take it to the bank
if you score against her, other disgruntled colleagues may start preparing cases too. she'll either have to modify her behaviour or start looking for a new job
meantime suck it up. and remember, this stuff ALWAYS tastes better from the chill cabinet
