Cart Page Tweaks

[alexzhang1618]

• Get feedback from design on the cart page
• support the ability to update variant and quantity on the cart page
• stress test the UI to try making sure theres no way to desync the cart state and place an invalid order to the API.
  • think about weird edge cases like logging out and switching portal accounts or if the quantity in stock changes because someone else purchased the last one will that look weird
• experiment with having the pickup event names and dates in a dropdown rather than a carousel to get a quick sense of every available pickup event and use the active dropdown selection to update the event preview image
• Don’t default to select any pickup event in case someone clicks too fast and doesn’t realize that they can change it - this should be intentional
• the event image in the place order modal is so huge, I would shrink 75% so the focus can be on the CTA buttons