Part 1 of the Accounts update:

I finally built the whole architecture for multi-account management. Users can now create accounts (like checking or savings) and assign transactions to them. Also Introduced “transfers” which allow users to move money between accounts without adding fake data to income or expenses. The add and edit transaction dialogs now feature a dynamic UI that swaps out categories & split transaction functionalities for “From/to” account selectors. Finally, updated localStorage & JSON data exports to make sure that accounts are included.