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I choose an AEDS crate from the RustCrypto group: AES-GCM in its SIV variant (the SIV variant isn't really needed but it doesn't cost much).
Drawers are serialized using the serde crate which is kind of standard in the Rust world and is very convenient. For the encoding format, I choose MessagePack which, like JSON, allows field addition but is much more compact. Having optional fields is very important to allow evolution of the file format while ensuring old files will stay compatible with newer versions of the application.
There are many low level libraries whose features go from the basic (and easy) task of coloring and styling the text you print in the terminal to handling events, terminal size, alternate screen, etc. I personally like Crossterm which is cross platform and well designed.
To better introduce it, I made a website explaining how it works, how to install it, how to use it: https://dystroy.org/safecloset/
I combine it with Termimad, a crate I made to manage skins, generate texts without mixing the style and the content, handle text inputs, even with wide characters, and a lot of small TUI related problems.