Looks cool, I always loved the hierchical nested node structures (like folders or e.g. trees) to organize my data. Would you be willing to tell what your tech stack is like? And what are you using for Rich text editors? Great work tho. Looks good.
Tech stack: - This is a django app. MVC. No separate API project and UI project. - Front end is basically Bootstrap 4 and jquery. - The tree is FancyTree - The DB is SQLite because there are no users. When usage becomes significant, I can easily migrate to MySQL. - Rich Text is Summernote.
I am 100% sure I would do this differently now. But I started it a few years ago and have kept it pretty much private. Thanks for checking in!