this is a macOS specific app it seems - if you want better performance and more integration with the OS, i'd recommend using swift
There's nothing wrong with using web tech to build things! It's often easier, the documentation is more comprehensive, and if you ever wanted to make it cross-platform election makes it trivial.
If you were working for a company it might be worth considering the trade-offs—do you need to support Macs with less RAM?—but for a side project that's for yourself and maybe some friends, just do what works for you!
Good luck in your development journey.
If you want to niche down into a more macOS specific app, you could learn AppKit and SwiftUI and build a fully native macOS app.
If you want to stay cross-platform, but you're not happy with Electron, then it might be worth checking out Tauri. It provides a JavaScript-based API to display native UI components, but without packaging a V8 runtime with your app bundle. Instead, it uses a native JavaScript host e.g. on macOS it uses WebKit, so it significantly reduces the download size of your app.
In terms of developing this into a product, on one hand it seems like deep integration with the host OS is the best way to build a "moat", but then again, Apple could release their own version and quickly blow a product like that out of the water.