When a recipe ingredient or list item is saved with both a product link and
a unit link, the unit's category is OR'd into the product's AllowedUnitCategories
so the dropdown filter populates itself from real usage instead of needing
explicit configuration. Family products are mutated directly; global products
gain (or extend) a per-family FamilyProductOverride so the global catalog
stays read-only.
The learner only widens flag sets — it never narrows or clears them — so
repeated writes are idempotent. No-ops when the global product already
covers the category (no spurious override rows).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Josh Rogers
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