future-tense
When you are sending it should show you how much you have.
Are you thinking about the payment options? I.e., Send as "1000 XLM (5000 Available)"
This screen
I'd just keep your balances visible how they are on the overview screen
I've experimented with a couple of different layouts, but I'm not sure what the most intuitive way to do this is.
The way it works now is a reflection of the underlying APIs. Paths and path payments are always specified in terms of the receiver, so there's no way of saying "I want to pay exactly N units of asset X, give me a list of the available options".
How about showing the balance in Lumens right next to the account name (on the sidebar)?
