Joe Maring / Android AuthorityAdd Android Authority on Google: TL;DR Y Combinator-backed startup Blue has launched the public beta of Blue Phone, which runs Blue OS on the Pixel 10 Pro and Pro XL. Blue’s AI assistant can work across apps, handle multiple tasks at once, and turn voice recordings into written messages. Blue Phone costs $1,299, but iPhone users can get it for free by trading in their old device within 30 days of purchase. AI assistants can do quite a lot these days. You can ask them to write emails, summarize documents, or help plan a trip. But…