Suggestion to add a setting called "Automatic End Turn" which automatically ends your turn if you have 0 energy and there are no mana in your backpack.
I don't care. Just make it a toggleable setting so people who want convenience can have it. If you have consumables, just don't turn the setting on. Just think about your moves BEFORE you use up all your energy! WOW! What a great idea! You should be doing that anyways.