Updated to same link. Made buttons for backpack switch, redid all the codes for artifacts transfer. The problems remaining I can not solve so I am over.

Remaining:

1) Combos are skipped, because ghost locked slots. If you delete the two lines preventing the combos, you will see what I mean.
2) If hero has >3 equipped artifacts of same type (ie: purse of gold), only 3 of them will be switched/given, the others will remain equipped. This is because at each switch we have to delete all artifacts, re-equip the extra so other slots are used. Not perfect but that's it.

Code for switch: