NEW: B2B quantity rules in the cart

EliteCart now respects Shopify's native B2B quantity rules everywhere a shopper changes how many of something they're buying - the cart's plus and minus buttons and the upsells you offer alongside them.
The Update
Shopify B2B catalogs let you set quantity rules on a product: a minimum order quantity, a maximum, and an increment (the "sold in packs of" step). Until now, EliteCart's cart let a wholesale buyer step outside those rules - down to one unit on a product that sells in cases of six, or off the increment entirely - and Shopify would only reject the basket later, at checkout. That's a confusing dead end for the exact customers you most want to make it easy for.
Now the cart enforces those rules as the buyer interacts with it, so the quantity in the drawer is always a quantity that can actually be ordered.
What's New
Minimum, maximum, and increment are respected: When a B2B buyer taps plus or minus on a cart line, EliteCart snaps to the next valid quantity for that product instead of any whole number. A product sold in packs of six steps 6, 12, 18 - never 7 or 5.
Removing an item still works: At the minimum order quantity, pressing minus removes the line entirely rather than getting stuck. Buyers can always take something out of their cart, even when it has a high minimum or a large increment.
Upsells follow the same rules: When a buyer adds a recommended product from an upsell, EliteCart starts it at that product's minimum order quantity, so the addition is valid the moment it lands in the cart.
Impact on Your Store
For merchants running wholesale or B2B alongside retail, this closes the gap between the cart and checkout. Company-account buyers get a cart that behaves the way your catalog rules say it should, fewer of them hit a rejected basket at the worst possible moment, and your support inbox sees fewer "why can't I check out" messages from your highest-value customers.
Configuration
No setup required. EliteCart reads the quantity rules already defined on your Shopify B2B catalog, so the cart and upsells follow them automatically for company-account buyers. Retail (DTC) carts are unaffected, since they carry the standard one-at-a-time rule.
Why This Matters
Wholesale buyers expect the cart to understand how they order. Honoring Shopify's own quantity rules - rather than leaving them to be discovered at checkout - makes EliteCart's cart trustworthy for B2B without any extra configuration on your side.