AI聊天系统的变化，已经不只是生成更流畅。更深的转折，是用户的第一动作从切应用，变成说需求。过去完成报销，常要穿过多个入口；现在聊天框开始把这些路径压缩成一句话。它不再只是消息窗口，而是数字生活的调度台。 这类工具的核心升级，是从问答型A

With conversational AI entering more professional environments, their ability to protect information has become an essential condition for adoption. Users may share business plans, personal questions, and internal documents during a single interaction. A useful system must therefore do more than