V2 purchase flow

[steven-fox]

• When a guest visits the /mobile route (everyone, before auth is in place) and clicks one of the buttons to purchase a license, we'll now show them a modal to collect their email.
• Upon submitting the email, we'll determine if a user already exists for that email. If one does not, we create one with the supplied email. Then, we create a stripe customer record for the user record if necessary and then redirect to a customer-specific checkout session in Stripe for the correct plan.
• Once a purchase is completed, we do the regular work:
  • Cashier handles subscription info for the existing user record.
  • We create an anystack contact (if necessary) and create a license.

This has been coded to also handle an authenticated user visiting the /mobile page. When this happens, we do not show a modal and upon clicking one of buttons, we would immediately redirect to a stripe checkout.

^^^ Note the email is fixed in this screenshot, indicating a customer-specific checkout session for the correct user.

[simonhamp]

Looks great! Let's go