I hve a global shortcut to open a Julia REPL session and I use that to perform any sort of quick calculations instead of a GUI calculator. The best thing about this approach is that I can always create new functions for stuff I use often.
I'd let the post about qalculate be about qalculate here.
Do you put those in your startup.jl? Do you have a Startup package like some recommend for Julia 1.9+?