feat: initial commit

apps/user-app/src/composables/useOrderItemProduct.ts

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+// The real GET /customers/:id/orders endpoint returns OrderItem rows with
+// only `productVariantId` (no nested product/variant title) — this joins
+// against the already-existing GET /catalog/products list client-side rather
+// than touching apps/api to add an include.
+import { ref } from 'vue'
+import { api } from '../api/client'
+
+export interface VariantLookup {
+  productTitle: string
+  variantTitle: string
+  imageUrl?: string
+}
+
+const cache = ref<Map<string, VariantLookup> | null>(null)
+
+async function ensureLoaded() {
+  if (cache.value) return cache.value
+  const products = await api.listProducts()
+  const map = new Map<string, VariantLookup>()
+  for (const product of products) {
+    for (const variant of product.variants) {
+      map.set(variant.id, {
+        productTitle: product.title,
+        variantTitle: variant.title,
+        imageUrl: product.images[0]?.url,
+      })
+    }
+  }
+  cache.value = map
+  return map
+}
+
+export function useOrderItemProduct() {
+  const lookup = async (productVariantId: string): Promise<VariantLookup | undefined> => {
+    const map = await ensureLoaded()
+    return map.get(productVariantId)
+  }
+  return { lookup }
+}

apps/user-app/src/composables/useProduct.ts

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+// Adapts our actual ProductSummary (apps/user-app/src/api/client.ts) into the
+// same output shape legacy's Mixins/product/index.ts `useProduct()` produced,
+// so the ported product-card components (ProductHorizontal/ProductVertical/
+// ProductVerticalFull) can render unchanged.
+//
+// Honest gaps vs. legacy (no backend equivalent exists yet — apps/api was not
+// touched to add these):
+//   - promotions/discounts: legacy matched a customer's order against admin
+//     promotion + ignore-list rules (getCandidPromotions/getPromotion). No such
+//     data exists in the new API, so `hasDiscountWage` is always null here —
+//     the discount badge and "before/after" price never render, which is
+//     correct given there is genuinely nothing to show, not a bug.
+//   - `wage`: legacy added the logged-in customer's own `percent` (a
+//     commission/markup field on their account) on top of the variant's
+//     making-charge %. No login exists in this port yet, so wage is just the
+//     selected variant's defaultWagePercent on its own.
+//   - `is_exist` (stock) and `has_warranty`: no such fields exist on our
+//     ProductVariant model yet — always true / false respectively.
+import { computed, ref, unref, type Ref } from 'vue'
+import type { ProductSummary, ProductVariantSummary } from '../api/client'
+
+function getCheapestVariant(variants: ProductVariantSummary[] | undefined): ProductVariantSummary | null {
+  if (!variants || variants.length === 0) return null
+  return variants.reduce((cheapest, v) =>
+    parseFloat(v.defaultWagePercent) < parseFloat(cheapest.defaultWagePercent) ? v : cheapest,
+  )
+}
+
+export function useProduct(productItem: ProductSummary, initialVariant?: ProductVariantSummary) {
+  const product = ref<ProductSummary>(productItem)
+  const image = computed(() => product.value.images?.[0]?.url)
+  const id = computed(() => product.value.id)
+  const title = computed(() => product.value.title)
+  const variants = computed(() => product.value.variants)
+  const selectedVariant: Ref<ProductVariantSummary | null> = ref(initialVariant ?? getCheapestVariant(unref(variants)))
+  const min_gram = computed(() => selectedVariant.value ? parseFloat(selectedVariant.value.rashWeightGrams) : 0)
+  const wage = computed(() => (selectedVariant.value ? parseFloat(selectedVariant.value.defaultWagePercent) : null))
+  const hasDiscountWage = ref<number | null>(null) // no promotions backend yet — see file header
+  const is_exist = ref(true) // no stock field on ProductVariant yet
+  const has_warranty = ref(false) // no warranty field on ProductVariant yet
+
+  return {
+    product,
+    image,
+    id,
+    title,
+    variants,
+    selectedVariant,
+    min_gram,
+    wage,
+    hasDiscountWage,
+    is_exist,
+    has_warranty,
+  }
+}

apps/user-app/src/composables/useProductDetail.ts

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+// Adapted from legacy singleProduct.vue's own fetch (GET /product/:id).
+// The new API has no single-product-detail endpoint (only GET
+// /catalog/products, the flat list) — apps/api is out of scope for this port,
+// so this fetches the full list and finds the matching product client-side.
+// Wasteful for a large catalog, but honest: no fabricated endpoint, no silent
+// behavior change.
+import { ref } from 'vue'
+import { api, type ProductSummary } from '../api/client'
+
+export function useProductDetail(id: string) {
+  const loading = ref(false)
+  const flag = ref(false)
+  const notFound = ref(false)
+  const productRef = ref<ProductSummary | null>(null)
+
+  const load = async () => {
+    loading.value = true
+    try {
+      const products = await api.listProducts()
+      const found = products.find((p) => p.id === id) ?? null
+      productRef.value = found
+      notFound.value = !found
+      flag.value = true
+    } catch (e) {
+      console.log(e)
+    } finally {
+      loading.value = false
+    }
+  }
+
+  return { loading, flag, notFound, productRef, load }
+}

apps/user-app/src/composables/useProducts.ts

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+// Adapted from legacy henza_pwa/src/Mixins/getProducts.ts. Legacy paginated
+// against POST /get-products (page/limit/count). The new API's GET
+// /catalog/products returns the full active catalog in one flat response with
+// no pagination — so `pull()` (legacy's infinite-scroll "next page" trigger)
+// is a no-op after the first successful fetch here, and `totalPages` is
+// always 0. This keeps the ScrollFetchSearch infinite-scroll wiring intact
+// (it still calls fetch on scroll) without fabricating fake pages.
+import { reactive } from 'vue'
+import { api, type ProductSummary } from '../api/client'
+
+export interface ProductsData {
+  totalPages: number
+  productList: ProductSummary[]
+  flag: boolean
+}
+
+export function useProducts() {
+  const productsData: ProductsData = reactive({
+    totalPages: 0,
+    productList: [],
+    flag: false,
+  })
+
+  const getProducts = async (loading: { value: boolean }, isPull = false) => {
+    if (isPull) return // no further pages exist server-side yet
+    loading.value = true
+    try {
+      productsData.productList = await api.listProducts()
+      productsData.flag = productsData.productList.length < 1
+    } catch (e) {
+      console.log(e)
+    } finally {
+      loading.value = false
+    }
+  }
+
+  return { productsData, getProducts }
+}

apps/user-app/src/composables/useRefresh.ts

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+// Ported from legacy henza_pwa/src/Mixins/useRefresh.ts.
+// Auto-applies a waiting service worker as soon as one is available, so the
+// PWA self-updates instead of serving a stale precache indefinitely.
+import { unref, watchEffect } from 'vue'
+import { useRegisterSW } from 'virtual:pwa-register/vue'
+
+export function useRefresh() {
+  const { offlineReady, needRefresh, updateServiceWorker } = useRegisterSW()
+
+  const refreshApp = async () => {
+    await updateServiceWorker()
+    offlineReady.value = false
+    needRefresh.value = false
+  }
+
+  watchEffect(async () => (unref(offlineReady) || unref(needRefresh)) && (await refreshApp()))
+}