Renders a line item card.
For stacked content, use line_item_card_row/1 for each repeated item. This lets the card align columns and show errors beneath each row on desktop, then place each error before its subtotal on mobile.
line_item_card_row/1
Category and rate can’t be blank
$0.00
Controls whether the card content is arranged inline or in stacked rows.
Additional classes to add to the parent.
Errors to display below the card.