Did you one-shot this using an AI coding agent? If this was really just now created after reading this article and the comments, it's incredibly impressive.
Let's say.... 10 shot with Claude Code :) Initial app, then hand refined, Claude Code again...back and forth. Spend my morning doing it and it was fun. Very simple so far, want to clean it up and add more meaningful features.
EDIT: Also, turns out the in-browser Editor landscape got GOOD the last few years apparently. It's really just plug and play. I remember 5 years I tried to do this and it was painful.
https://about.workledger.org/
All local first. Happy to get some contributors :)