$XDG_RUNTIME_DIR points to a non existent directory #865
Description
Currently on dojo $XDG_RUNTIME_DIR is /run/user/1000, which is not exist.
Some programs need a valid $XDG_RUNTIME_DIR to work like firefox, tmux. Both of them work since they have fallback code to choose other dirs in case this case.
(firefox:1822053): dconf-CRITICAL **: 02:27:20.248: unable to create directory '/run/user/1000/dconf': Permission denied. dconf will not work properly.
[Parent 1822053, Unnamed thread 7269cfa39a60] WARNING: unable to create directory '/run/user/1000/dconf': Permission denied. dconf will not work properly.: 'glib warning', file /build/firefox-141.0/toolkit/xre/nsSigHandlers.cpp:201
But some other program may not have fallback code like that, and will fail to start, in example zellij (an alternative to tmux).