Module: Catalog

Product catalog — products, categories (tree), brands — with soft-delete/restore/trash and search. Module Order = 600. This is the reference module for the soft-delete + image patterns; copy from here.

Entities / DbContext: Product (aggregate, soft-deletable) + ProductImage, Brand, Category (self-referencing tree), Money (owned value object). CatalogDbContext. Domain events (ProductCreated/PriceChanged/StockAdjusted) are internal, not integration events. Areas: Products (+ price/stock/images), Categories (+ tree), Brands — each with Create/Update/Delete/Search/ListTrashed/Restore. Full list: Features/v1/ or /scalar.

Gotchas / patterns to copy

• Soft-delete + restore + trashed-listing is the standard pattern. Unique indexes are filtered on "IsDeleted" = FALSE so SKU/Slug stay unique-per-tenant among live rows only (a deleted SKU can be reused). Replicate this on any soft-deletable unique field.
• EF value-generation for nav children — ProductImageConfiguration sets Id.ValueGeneratedNever() (same nav-child footgun as Chat — see database.md).
• Single-thumbnail invariant is enforced by the aggregate, not a partial unique index (Postgres non-deferrable partial unique indexes can't handle the demote/promote ordering in one transaction). Enforce such invariants in the domain.
• Registers ProductFileAccessPolicy (OwnerType "Product") for product images via the Files module.
• Route ordering: literal segments (/trash, /tree, /restore) are registered before /{id:guid} catch-alls.