Space Haven is a RimWorld inspired spaceship colony sim, you can find it on steam here. While the main goal is to explore the space and gather ressources, trading is also a valuable feature in the game to progress the game.
With Space Haven Manager, I built a small webapp that allows you to manage trading prices. It turns out to be helpful to estimate costs for a new spaceship, for example, or to just get a feeling how good a deal from a trader actually is.
From a technical perspective, AlpineJS is used as a thin layer around events and state management. For persistance, I'm using the Local Storage API. Testing is done via playwright and some automatic accessibility checks are done via axe-core. The tests are run on every push to the repository via GitHub Actions, this ensures consistent quality.
You can try it out and find the manager here: https://fschoenfeldt.de/project_manager/