fix: current org is system and no preorg user logout error

[fit2bot]

fix: current org is system and no preorg user logout error

[BaiJiangJie]

I checked the given snippet and found no known issue. It seems fine, with some minor changes like adding curly braces around the "localStorage" lines to keep it consistent in coding style conventions.

Here's what I suggest:

1. No obvious issues were highlighted.
2. Ensure that all imports are correct as per version used or consider using a different import statement according to modern JavaScript practices. (Assuming this context is from an older version of Node.js when these statements might be more common.)
3. For better clarity on global functions and their usage patterns, add comments at appropriate points explaining their purpose, parameters, return value etc., if not already done (especially considering the current code).
4. If you plan for any future rework or modification to the core logic, make sure to update docstrings where necessary to clearly state how they should interact with other parts of the application or system. Always maintain compatibility across different versions.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[BaiJiangJie]

用户退出时，当前组织为 系统组织（或自动切换的组织），并且设置 currentOrg 为 preOrg（此时 preOrg 为空时），清除本地的 currentOrg，下次登录就不是 system 组织了。否则还是 system。

复现条件：

currentOrg:admin = system
preOrg:admin 没有这个 key

用户点退出。