I will explain more about “maashe ksivah”
For some things, you need a “maaseh ksivah” which means to actually write out the letters. For example, the Halachah of “chuk tochos” that you are probably familiar with.
I think that it is pashut that this is no better than chuk tochos. You are causing a letter to form on a screen, but only by a roundabout way (causing the circuits in the chip in the phone to align in the right way etc.). That is why chuk tochos is not ksivah (letter was formed in roundabout way). This is no better.
Whether or not Shabbos needs a “maaseh ksivah”, like i said, the Ran holds that it doesn’t, but i think that there are those that hold that it does (if not it probably wouldn’t be known in the “yeshiva world” as “the Ran’s chiddush”). But of this i am not certain, as i am not actually learning the sugya at the present time.