Fix background commander thread arguments

[IlyaKochnev]

Summary

• pass the constructed command to the background thread target
• prevent every asynchronous commander(...) call from failing with a missing-argument TypeError
• restore background apply-users execution after user changes in the panel

Root cause

cmd_in_back requires a cmd argument, but the thread was created without args. As a result, the thread failed before spawning common/commander.py, while the caller still returned success.

This left generated service configurations stale. One observed consequence was that a user deleted from the UI remained in Telemt's generated config.toml.

Testing

• python3 -m py_compile hiddifypanel/panel/run_commander.py

• git diff --check

• verified the failure on Hiddify Manager/Panel 12.3.3 from the logged traceback:

  TypeError: cmd_in_back() missing 1 required positional argument: 'cmd'
  

Fixes hiddify/Hiddify-Manager#5498

[rezasabourinejad]

already mentioned 2 weeks ago here:
#30
nice to check PR

@hiddify-com
@pjrobertson