# Proposal

## Why

The mall is the only frontend still on the fixed-data mock adapter; `shop-admin` and `admin` run live. Every mall catalog surface also bypasses the `@vmall/shared` contract — 18 files import `~/mock/data` and no `$api` catalog call exists. The storefront cannot outgrow demo data, and no later domain can flip until real SKU ids come from the live catalog.

## What Changes

- Replace the all-or-nothing `mockApi` boolean with a per-domain switch; Wave 1 flips `catalog` and `currency`, leaving auth, cart, orders, shipments and invoices on mock.
- Rewire the browse surfaces (home floors, `/search`, `/goods/[id]`, category menu) from `~/mock/data` onto `listCategories`, `listProducts` and `getProduct`.
- **BREAKING** (browse UX): remove the brand facet and the `sales`/`comments` sorts, which have no backing model; add `sort=price` with `order=asc|desc`.
- Filter public product listing by category **subtree**, as the mock does today, instead of exact `category_id`.
- Grow `scripts/seed-demo.mjs` to parity: categories with children and grandchildren, ~24 bilingual products, 4 shops (live: 3 childless categories, 4 products, 1 shop).
- Banners, promos, quick links and floor art stay local.

## Capabilities

### New Capabilities

(none)

### Modified Capabilities

- `catalog`: add a public browse requirement — category subtree filtering and an optional price sort on `/api/products`.
- `frontend-mall`: "Mock API adapter" becomes a per-domain switch with catalog and currency live; browse surfaces re-sourced from the API without the brand facet or non-price sorts.

## Impact

`apps/mall/plugins/api.ts`; 18 files under `apps/mall/{pages,components}`; `apps/mall/mock/data.ts` (marketing content only); `packages/shared/src/api.ts` (`ProductListQuery` gains `sort`/`order`); `apps/api/src/routes/catalog.rs`; `scripts/seed-demo.mjs`. The shared contract change means all three frontends must rebuild.

## Non-goals

Auth, cart, orders, shipments and invoices stay mock. No backend capability for brands, storefront content, store directory, favorites, coupons or addresses; those stay mock. No change to money handling, i18n storage or the other apps.