Sending supportive thoughts your way, jbug. I have had difficult neighbors in the past and it drives me nuts too. Sounds like you have done a great job of laying down your boundaries, though. Her problems and her alcoholism are not your problem. She has a right to drink and she has a right to seek help... But it's all on her terms. I have found Al Anon so helpful with info about boundaries. You might find some supportive "food for thought" on their website.
Just a few other thoughts from me:

1. An extra strong lock for your door, maybe two. Even just to send the signal of strong boundaries.

2. A noise machine and earplugs. (I use those when our neighbors throw a loud all-nighter )

3. When you see her act busy. If she starts to engage you - maybe you can rush by and say "Hi (her name)... Sorry I can't chat. I'm busy today and have to get going..."

Elana