Refund issued notification (MAIL-12).
Sent when Stripe emits charge.refunded. Body renders the full fee
breakdown (formatted_amount, formatted_stripe_fee_refunded,
formatted_merchant_loss) so the customer sees what was returned
and what Stripe withheld. Does NOT embed the shared invoice
components — refunds are a distinct flow from invoices.
Summary
Functions
Returns the raw MJML template. Useful for debugging rendering issues.
Safely render the MJML template using Phoenix.HTML