A1: FFI 导出 V2 函数 (start/pause/resume/close/push/export/ack/mark) A2: ActiveTimeTracker 集成到 session_v2 A3: push_event 调用 position.normalized() A4: remove_session 检查 Closed 状态 A5: Buffer 溢出驱逐 if-let 链修正 A8: reload_stale_events_v2() 启动恢复 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>