I had to turn the photo to get a better look at her. What a cutie pie! (Editing to add that I thought London would be the first picture below, but she's the last . . .)
At first I thought maybe a Shavanese was a Shih-tzu combined with Havanese, but then I googled it and found this link:
I'll let someone else address the allergies question. (Wouldn't short hair on the Havanese be the same as long hair as far as allergies go? My DH doesn't have an allergic reaction to Shama even though he reacts to almost every other breed of dog, including the so-called hypoallergenic breeds, but my 14 year-old niece has an allergic reaction to Shama!)
There are many threads about crate training on the forum. I would just suggest you decide where your dog will sleep and have her sleep there consistently from this point forward. Shama slept in her crate in the dining room for two nights (?) and then within her ex pen (open crate inside) in the dining room thereafter. Whenever we travel, we bring her ex pen with us, so it's the only place she's slept since she was tiny. We camped in our living room the first few nights we had her, but then we relocated to our bedroom. She's always been a great sleeper!
Good luck! Please post more photos, and let us know what happens!
PS If your kids want to see pictures of Shama from her puppyhood until now, they should just click on my username and look through my threads! Below are pictures of Shama from seven weeks (at the breeder's house), nine and a half weeks (when we brought her home), and today (two and a half years).