[Feature] [UI] : Clients can accept server theme from upstream

[michft]

Picture this
On client and using thread connecting to a linux server it is orange background, but now you are connecting to THE work laptop it has red background, move to mac-mini / local with full sandbox it has a green background. There is an option for a "transparent" thread background or an "upstream" thread background. Used to use this for env isolation on ssh machines by coloring the CLI. You knew before you restarted / updated / killed a process etc what your blast radius was, green yolo, red think about it.

[michft]

#15596 was similar but more a status changer rather than a origin changer

[michft]

Hmm, thought about this, this is solving a problem I have that others with something like Fleet do not. could be a shinny waste of effort. But i got the tokens

[michft]

Ironically did just find a use, was logging into a remote cli and was not understanding why the creds were not propagating from CLI for agent. Had server setup in thread, was editing configs locally. Changing the BG color when activationg thread would have added another hint.