But that does not matter if you trust your client and everything gets encrypted locally. That's the entire point of client-side encryption, not having to trust

But that does not matter if you trust your client and everything gets encrypted locally. That's the entire point of client-side encryption, not having to trust the server. Just review and then compile the client. And just self-hosting the server will not make you any saver because the client may be rogue and send your data to anyone.