Default location not sane, changing install location does not update download/input/output location

When installing comfyui on linux the default location is `~/ComfyUI-Shared` this is not up to standard, this kind of software if installed on a per-user basis like this should be installed under subdirectories in `~/.local/` most likely `~/.local/share`.

I changed the install location to just that during installation but afte rinstallation it says downloads, input and output still expect to go to the insane default.

Both of these problems need to be fixed.

Either install it properly on the system rather than to the user's home directory, or ensure that it defaults to a sane home subdirectory and ensure that if that install directory is changed during installation all other subdirectories within the installation get automatically updated as a result instead of remaining on the default.

Start by tracing the Linux installation flow and the configuration used for the install, download, input, and output locations. Verify how changing the install directory is persisted and consumed. Done means the default uses a sane per-user location and changing the install directory updates all related locations consistently.

Written by the indexing model from the issue text.