Each variant needs: sku, label (250 ml / 1 L), price_inr, compare_at_inr?, stock, weight_grams?.
sku
label
price_inr
compare_at_inr?
stock
weight_grams?
Buttons are UI-only. Saving will call POST/PATCH /api/admin/products once Laravel is ready.
POST/PATCH /api/admin/products