Tried it out for a few mins and it does what advertised. I think Electron is perfectly fine for what this app does: Managing ECS. It's not an all-in-one platform the same way VSCode is, so bloating isn't really an issue. On my M2 MacBook pro 64GB, it's sitting at 30.5 Mb of memory usage. JetBrains' toolbox app (Written using Java) is sitting at 505.1Mb and this app arguably does more than that one, if not an equal amount. The wallpaper process is taking up 29.9Mb of memory, so this app amounts to just another wallpaper worth of memory which is nothing.
However, for any app that aims to be an "all-in-one" desktop GUI replacement for the aws console, which may need extensions, a native framework would be the way to go over electron.
One piece of feedback I have is to just have a selection menu for models from providers rather than asking the user to input text, as well as an option for effort level if available.