You have built a beautiful TUI, hats off. Having that said, however, if feels like a missed opportunity for this project to use an SQLAlchemy-based database backend over the more simplistic and widely supported ledger [1] format. While I understand that the your tool might not want to leverage the full complexity of a double-entry accounting system, as a friend of plain text accounting [2] I would have preferred a format that I can alter with existing tools, in order to be able to integrate _Bagels_ into an existing workflow.

Nevertheless, the TUI looks very clean and shows nicely how powerful the Textual application framework is.

[1] https://ledger-cli.org [2] https://plaintextaccounting.org