My youngest is eight. She's been good over the last year, I've only caught her once (as she tried to hide the them up her sleeve) but she was a prolific thieving toddler.
From being a baby who was constantly bringing stuff from nursery home in her pocket (used to send her with a really comfy old hoodie with a front pocket) to a toddler who stole friends toys, blue tack from behind posters in shops and surgeries etc, to the young child who stole sweets and chocolate from the local shop behind my back..... Oh god and just over two years ago she stole two pockets of items from Lush, I marched her straight back in...
I totally understand.
My kids have both had a lot on over the last few years and my youngest hasn't had a safe, secure start (well, I worked hard to make it safe and secure but it meant running from her abusive dad).
She seems much more stable now, but she still nicks blue tack and ends up with very small items she says friends gave her, which I've checked up on and it's been true so far.
She hasn't stolen from purses but she will take a large interest if she sees money on a counter top etc.
It sounds to me like there's something on your daughter's mind, or she's being treated less than wonderfully by someone. The thrill of taking things is quite good, I remember a patch like this when I was the same sort of age, maybe slightly younger.
But to put everyone's minds at ease I'd try get a counselling session/ therapy session where you can be in to begin with but then have the therapist and your daughter talk together alone.
I've been looking for something similar locally for my youngest.