本次主要完善了 C2 会话管理的体验与可靠性：会话/任务列表支持 SSE 实时刷新；会话详情、任务历史与信息页做了紧凑美化；修复 Sleep/抖动被心跳覆盖无法生效的问题，并改为单次自定义配置弹窗；系统配置中新增从 API 自动获取模型列表；另修复页头批量删除按钮对齐、标签切换黑框闪烁等问题。
This update improves C2 session management UX and reliability: session/task lists refresh in real time via SSE; the detail view, task history, and info panel were redesigned to be more compact; Sleep/jitter settings no longer get overwritten by heartbeats and use a single custom modal; settings now support fetching the model list from the configured API; plus minor fixes for header button alignment and tab-switch focus flash.