Move prompt gathering out of GetSessionDetails

When I introduced the concept of gathering session details after each command that gets run, I rolled prompt gathering into that to avoid running yet another command each time a prompt is needed. It seems that this causes more problems than necessary because a prompt function that throws errors does not get handled correctly anymore.

I'll move prompt gathering back out into the ConsoleService so that we can check for errors and return a default prompt appropriately.

首先定位 GetSessionDetails 和 ConsoleService，然后跟踪 prompt 收集和 prompt 函数错误的处理位置。将 prompt 收集移至 ConsoleService，并验证 prompt 错误会按照 issue 中的描述生成默认 prompt。