Anticipate and Learn: Unleashing Idle-Time Compute in Proactive Agents. - Haoyi Hu; Qirong Lyu; Xianghan Kong; Weiwen Liu; Jianghao Lin; Zixuan Guo; Yan Xu; Yasheng Wang; Weinan Zhang 001; Yong Yu 001 (CoRR, 2026)