Tencent Holdings’ WeChat is already the undisputed super-app for over a billion people in China, handling everything from splitting dinner bills to hailing taxis. Now, Tencent is embedding an artificial intelligence agent named Xiaowei into the platform, adding a hands-free, automated assistant to its vast digital ecosystem. In its latest earnings results announced on Wednesday, Tencent highlighted Xiaowei for the first time, touting its focus on user privacy and inference efficiency. After...