Mirrors the Phase 2 work on RecipeIngredient: ShoppingListItem grows
Quantity (decimal), UnitOfMeasureId / FamilyUnitOfMeasureId, IsApproximate,
and QuantityNote. The recipe-to-list copy now carries structured fields
verbatim instead of folding them into the free-form Name, and the
unit-in-use guard now also blocks deleting a family unit that's referenced
by a shopping list item.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Josh Rogers
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