- coordinator: arbitrate_conflicts 方法(规则仲裁:成功方优先/双方成功推荐合并/都失败手动) - coordinator: ConflictItem 加 subtask_a/subtask_b/recommendation 字段 + ConflictResolution 枚举 - command_lock.rs: CommandLockRegistry (dir+cmd首词 Semaphore 串行化,5个测试全绿) - resolve_conflict IPC: 解决冲突→更新DB→emit AiConflictResolved 事件闭环 - 3个仲裁测试 + 5个互斥锁测试全绿 - 零编译警告