BTL-UI: Blink-Think-Link Reasoning Model for GUI Agent - Zhang, Shaojie; Zhang, Ruoceng; Fu, Pei; Wang, Shaokang; Yang, Jiahui; Du, Xin; ShiqiCui; Qin, Bin; Huang, Ying; Luo, Zhenbo; Luan, Jian (Advances in Neural Information Processing Systems, 2025)