Smart variables

A preset can contain placeholders written as [NAME:type:default], where the type is txt or num. Each one becomes an editable field in a Variables panel, and its value is substituted into the prompt just before it's sent.

One preset then serves many requests - you change the variable values, not the prompt body. Add variables to a preset for the parts you change often, like an artist name or a tempo.

Example. A preset containing [ARTIST:txt:Pink Floyd] shows an ARTIST field pre-filled with "Pink Floyd". Change it to "Daft Punk" and that generation uses Daft Punk, with the preset itself unchanged.