I think this is neat. I use org-mode for pretty much everything, which has all of these features I think, but sometimes there is nothing more motivating than a quick responsive UI to actually do something. This looks motivational.

My only pushback is using sqlite. I am a big fan of just using simple (structured) text files that can be edited by hand when needed. Your computer is more than capable of doing all the joining/querying/aggregating/whatever with the text file itself rather than relying on a database. I personally find these sort of file structures comforting as it means they can be easily modified in unsupported ways.