follow bug31, 1. 修复dev84 multi子命令--levels默认值解析崩溃(兼容层列表与单整数两种语义); 2. C++后端冒烟回归达标(bench res≤3.8e-07, multi一致性PASS); [opencode].
follow bug31, 1. 修复dev84 multi子命令--levels默认值解析崩溃(兼容层列表与单整数两种语义); 2. C++后端冒烟回归达标(bench res≤3.8e-07, multi一致性PASS); [opencode].