You've already gotten tips based on git. But if you use a JetBrains IDE, you also have the local history there. Or can use the shelve functionality, which is like git's stash but a bit smoother.
I don't know how JetBrains IDEs do 'local histories' but FWIW VSCode recently also implemented "local file history"[1]. I have not had to use it to salvage anything yet, but I'm sure that day will come.
