Group Ordering Basket / shareable link

Problem
Offices and teams placing catering orders today have one person collect everyone's choices by hand (email/Slack/spreadsheet) and re-key them into a single basket. This is slow, error-prone and caps how large a group order can realistically get.

Requested

• An organiser can start a group order from a catering store and get a short share code / link.
• Colleagues open the link, pick their own items (with their name attached) and everything lands in one shared live basket.
• The organiser sees the combined basket, can remove/adjust lines, and checks out once for the whole order.
• Budgets: the organiser can set a per-person spend limit (and optionally a total order cap); guests see their remaining allowance and can't exceed it.
• Order confirmation / kitchen ticket keeps the per-person grouping so items can be labelled.

Requested by
Sprout Food Co (original request), Gabrielke Remoli, The Salad Kitchen (incl. budgets).

Notes
The order app already has a live shared basket (Ably) for group ordering at a table; this would extend it to catering keyed by a share code instead of a table.