chore: add bulk compare-at-price update script + restore middleware auth

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -0,0 +1,36 @@
+This is a [Next.js](https://nextjs.org) project bootstrapped with [`create-next-app`](https://nextjs.org/docs/app/api-reference/cli/create-next-app).
+
+## Getting Started
+
+First, run the development server:
+
+```bash
+npm run dev
+# or
+yarn dev
+# or
+pnpm dev
+# or
+bun dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+
+This project uses [`next/font`](https://nextjs.org/docs/app/building-your-application/optimizing/fonts) to automatically optimize and load [Geist](https://vercel.com/font), a new font family for Vercel.
+
+## Learn More
+
+To learn more about Next.js, take a look at the following resources:
+
+- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
+- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+
+You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js) - your feedback and contributions are welcome!
+
+## Deploy on Vercel
+
+The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+
+Check out our [Next.js deployment documentation](https://nextjs.org/docs/app/building-your-application/deploying) for more details.

package.json

@@ -13,14 +13,21 @@
     "seed": "ts-node --compiler-options '{\"module\":\"CommonJS\"}' prisma/seed.ts"
   },
   "dependencies": {
+    "@imgly/background-removal": "^1.7.0",
     "@prisma/adapter-better-sqlite3": "^7.8.0",
     "@prisma/client": "^7.8.0",
     "bcryptjs": "^3.0.3",
     "better-sqlite3": "^12.10.0",
+    "googleapis": "^173.0.0",
+    "heic-convert": "^2.1.0",
+    "heic2any": "^0.0.4",
+    "jszip": "^3.10.1",
     "next": "14.2.35",
     "next-auth": "^4.24.14",
+    "onnxruntime-web": "^1.21.0",
     "react": "^18",
-    "react-dom": "^18"
+    "react-dom": "^18",
+    "sharp": "^0.34.5"
   },
   "devDependencies": {
     "@testing-library/jest-dom": "^6.9.1",
@@ -30,6 +37,7 @@
     "@types/node": "^20",
     "@types/react": "^18",
     "@types/react-dom": "^18",
+    "@types/sharp": "^0.31.1",
     "eslint": "^8",
     "eslint-config-next": "14.2.35",
     "jest": "^30.4.2",

prisma/migrations/20260609073303_add_product_creation/migration.sql

@@ -0,0 +1,14 @@
+-- CreateTable
+CREATE TABLE "ProductCreation" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "userId" TEXT NOT NULL,
+    "sheetTab" TEXT NOT NULL,
+    "sheetRow" INTEGER NOT NULL,
+    "shopifyId" TEXT NOT NULL,
+    "sku" TEXT NOT NULL,
+    "title" TEXT NOT NULL,
+    "status" TEXT NOT NULL DEFAULT 'success',
+    "errorMessage" TEXT NOT NULL DEFAULT '',
+    CONSTRAINT "ProductCreation_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User" ("id") ON DELETE RESTRICT ON UPDATE CASCADE
+);

prisma/schema.prisma

@@ -7,13 +7,14 @@ datasource db {
 }
 
 model User {
-  id        String    @id @default(cuid())
+  id                 String              @id @default(cuid())
-  email     String    @unique
+  email              String              @unique
-  name      String
+  name               String
-  password  String
+  password           String
-  role      String    @default("gestionnaire")
+  role               String              @default("gestionnaire")
-  createdAt DateTime  @default(now())
+  createdAt          DateTime            @default(now())
-  syncRuns  SyncRun[]
+  syncRuns           SyncRun[]
+  productCreations   ProductCreation[]
 }
 
 model SyncRun {
@@ -28,3 +29,17 @@ model SyncRun {
   errors      Int      @default(0)
   log         String   @default("[]")
 }
+
+model ProductCreation {
+  id           String   @id @default(cuid())
+  createdAt    DateTime @default(now())
+  userId       String
+  user         User     @relation(fields: [userId], references: [id])
+  sheetTab     String
+  sheetRow     Int
+  shopifyId    String
+  sku          String
+  title        String
+  status       String   @default("success")
+  errorMessage String   @default("")
+}

scripts/update-compare-at-price.ts

@@ -0,0 +1,76 @@
+/**
+ * Met à jour compare_at_price sur tous les produits Shopify existants
+ * en lisant Prix marché / Prix remisé depuis Google Sheets.
+ *
+ * Usage: npx ts-node -r tsconfig-paths/register scripts/update-compare-at-price.ts
+ */
+
+import * as dotenv from 'dotenv'
+dotenv.config({ path: '.env.local' })
+
+import { readSheetProducts } from '../src/lib/googleSheets'
+import { fetchAllShopifyProducts, getConfig } from '../src/lib/shopifySync'
+
+async function main() {
+  console.log('Lecture Google Sheets…')
+  const sheetProducts = await readSheetProducts()
+  console.log(`${sheetProducts.length} produits dans Sheets`)
+
+  console.log('Lecture produits Shopify…')
+  const shopifyProducts = await fetchAllShopifyProducts()
+  console.log(`${shopifyProducts.length} produits dans Shopify`)
+
+  const shopifyByHandle = new Map(shopifyProducts.map(p => [p.handle, p]))
+
+  const { baseUrl, headers } = getConfig()
+
+  let updated = 0
+  let skipped = 0
+  let errors = 0
+
+  for (const sheet of sheetProducts) {
+    const shopify = shopifyByHandle.get(sheet.handle)
+    if (!shopify) { skipped++; continue }
+
+    const newCompareAt = sheet.compareAtPrice ?? null
+    const currentCompareAt = (shopify as { compareAtPrice?: string }).compareAtPrice ?? null
+
+    // Normalise pour comparer (null vs undefined vs "0.00" vs null)
+    const norm = (v: string | null) => (!v || v === '0.00') ? null : v
+    if (norm(newCompareAt) === norm(currentCompareAt)) { skipped++; continue }
+
+    // Récupère le variantId
+    const detailRes = await fetch(`${baseUrl}/products/${shopify.shopifyId}.json?fields=variants`, { headers })
+    if (!detailRes.ok) { console.error(`Erreur lecture variant ${sheet.ref}`); errors++; continue }
+    const detail = await detailRes.json() as { product: { variants: Array<{ id: number }> } }
+    const variantId = detail.product.variants[0]?.id
+    if (!variantId) { errors++; continue }
+
+    const res = await fetch(`${baseUrl}/products/${shopify.shopifyId}.json`, {
+      method: 'PUT',
+      headers,
+      body: JSON.stringify({
+        product: {
+          id: shopify.shopifyId,
+          variants: [{ id: variantId, price: sheet.price, compare_at_price: newCompareAt }],
+        },
+      }),
+    })
+
+    if (res.ok) {
+      console.log(`✓ ${sheet.ref} — price=${sheet.price} compare_at=${newCompareAt ?? 'null'}`)
+      updated++
+    } else {
+      const err = await res.text()
+      console.error(`✗ ${sheet.ref} — ${err}`)
+      errors++
+    }
+
+    // Rate limiting
+    await new Promise(r => setTimeout(r, 300))
+  }
+
+  console.log(`\nTerminé : ${updated} mis à jour, ${skipped} inchangés, ${errors} erreurs`)
+}
+
+main().catch(err => { console.error(err); process.exit(1) })

src/__tests__/api/images/upload.test.ts

@@ -0,0 +1,75 @@
+import { POST } from '@/app/api/images/upload/route'
+import { NextRequest } from 'next/server'
+
+jest.mock('@/lib/shopify', () => ({
+  uploadProductImage: jest.fn(),
+}))
+
+import { uploadProductImage } from '@/lib/shopify'
+const mockUpload = uploadProductImage as jest.Mock
+
+describe('POST /api/images/upload', () => {
+  beforeEach(() => jest.clearAllMocks())
+
+  it('retourne 400 si shopifyProductId manquant', async () => {
+    const req = new NextRequest('http://localhost/api/images/upload', {
+      method: 'POST',
+      body: JSON.stringify({ imageBase64: 'abc', filename: 'test.jpg' }),
+      headers: { 'Content-Type': 'application/json' },
+    })
+    const res = await POST(req)
+    expect(res.status).toBe(400)
+  })
+
+  it('retourne 400 si imageBase64 manquant', async () => {
+    const req = new NextRequest('http://localhost/api/images/upload', {
+      method: 'POST',
+      body: JSON.stringify({ shopifyProductId: '123', filename: 'test.jpg' }),
+      headers: { 'Content-Type': 'application/json' },
+    })
+    const res = await POST(req)
+    expect(res.status).toBe(400)
+  })
+
+  it('retourne 400 si filename manquant', async () => {
+    const req = new NextRequest('http://localhost/api/images/upload', {
+      method: 'POST',
+      body: JSON.stringify({ shopifyProductId: '123', imageBase64: 'abc' }),
+      headers: { 'Content-Type': 'application/json' },
+    })
+    const res = await POST(req)
+    expect(res.status).toBe(400)
+  })
+
+  it('retourne l\'URL après upload réussi', async () => {
+    mockUpload.mockResolvedValue({ url: 'https://cdn.shopify.com/image.jpg' })
+    const req = new NextRequest('http://localhost/api/images/upload', {
+      method: 'POST',
+      body: JSON.stringify({
+        shopifyProductId: '123456',
+        imageBase64: 'base64data==',
+        filename: 'REF-1042.jpg',
+      }),
+      headers: { 'Content-Type': 'application/json' },
+    })
+    const res = await POST(req)
+    expect(res.status).toBe(200)
+    expect(await res.json()).toEqual({ url: 'https://cdn.shopify.com/image.jpg' })
+    expect(mockUpload).toHaveBeenCalledWith('123456', 'base64data==', 'REF-1042.jpg')
+  })
+
+  it('retourne 500 en cas d\'erreur Shopify', async () => {
+    mockUpload.mockRejectedValue(new Error('Shopify upload error: 422'))
+    const req = new NextRequest('http://localhost/api/images/upload', {
+      method: 'POST',
+      body: JSON.stringify({
+        shopifyProductId: '123',
+        imageBase64: 'abc',
+        filename: 'test.jpg',
+      }),
+      headers: { 'Content-Type': 'application/json' },
+    })
+    const res = await POST(req)
+    expect(res.status).toBe(500)
+  })
+})

src/__tests__/api/products/search.test.ts

@@ -0,0 +1,53 @@
+import { GET } from '@/app/api/products/search/route'
+import { NextRequest } from 'next/server'
+
+jest.mock('@/lib/shopify', () => ({
+  searchProductByRef: jest.fn(),
+}))
+
+import { searchProductByRef } from '@/lib/shopify'
+const mockSearch = searchProductByRef as jest.Mock
+
+describe('GET /api/products/search', () => {
+  beforeEach(() => jest.clearAllMocks())
+
+  it('retourne 400 si le paramètre ref est absent', async () => {
+    const req = new NextRequest('http://localhost/api/products/search')
+    const res = await GET(req)
+    expect(res.status).toBe(400)
+    const data = await res.json()
+    expect(data.error).toMatch(/ref/)
+  })
+
+  it('retourne 400 si ref est une chaîne vide', async () => {
+    const req = new NextRequest('http://localhost/api/products/search?ref=')
+    const res = await GET(req)
+    expect(res.status).toBe(400)
+  })
+
+  it('retourne { found: false } si produit introuvable', async () => {
+    mockSearch.mockResolvedValue({ found: false })
+    const req = new NextRequest('http://localhost/api/products/search?ref=REF-9999')
+    const res = await GET(req)
+    expect(res.status).toBe(200)
+    expect(await res.json()).toEqual({ found: false })
+    expect(mockSearch).toHaveBeenCalledWith('REF-9999')
+  })
+
+  it('retourne le produit trouvé', async () => {
+    mockSearch.mockResolvedValue({ found: true, shopifyId: '123456', title: 'Carrelage REF-1042' })
+    const req = new NextRequest('http://localhost/api/products/search?ref=REF-1042')
+    const res = await GET(req)
+    expect(res.status).toBe(200)
+    expect(await res.json()).toEqual({ found: true, shopifyId: '123456', title: 'Carrelage REF-1042' })
+  })
+
+  it('retourne 500 en cas d\'erreur Shopify', async () => {
+    mockSearch.mockRejectedValue(new Error('Shopify API error: 503'))
+    const req = new NextRequest('http://localhost/api/products/search?ref=REF-1042')
+    const res = await GET(req)
+    expect(res.status).toBe(500)
+    const data = await res.json()
+    expect(data.error).toBeTruthy()
+  })
+})

src/__tests__/api/sync/history.test.ts

@@ -0,0 +1,61 @@
+import { GET } from '@/app/api/sync/history/route'
+import { NextRequest } from 'next/server'
+
+jest.mock('@/lib/prisma', () => ({
+  prisma: {
+    syncRun: {
+      findMany: jest.fn(),
+    },
+  },
+}))
+
+import { prisma } from '@/lib/prisma'
+const mockFindMany = prisma.syncRun.findMany as jest.Mock
+
+describe('GET /api/sync/history', () => {
+  beforeEach(() => jest.clearAllMocks())
+
+  it('retourne une liste vide si aucun SyncRun', async () => {
+    mockFindMany.mockResolvedValue([])
+    const req = new NextRequest('http://localhost/api/sync/history')
+    const res = await GET(req)
+    expect(res.status).toBe(200)
+    expect(await res.json()).toEqual([])
+  })
+
+  it('retourne les syncs formatées', async () => {
+    const fakeRun = {
+      id: 'clid1',
+      createdAt: new Date('2026-06-08T10:00:00Z'),
+      status: 'success',
+      created: 3,
+      updated: 1,
+      deactivated: 0,
+      errors: 0,
+      log: JSON.stringify([{ ref: 'REF-1', action: 'create', status: 'success', message: '✓ REF-1 créé' }]),
+      user: { name: 'Mathieu' },
+    }
+    mockFindMany.mockResolvedValue([fakeRun])
+
+    const req = new NextRequest('http://localhost/api/sync/history')
+    const res = await GET(req)
+    expect(res.status).toBe(200)
+
+    const data = await res.json()
+    expect(data).toHaveLength(1)
+    expect(data[0].id).toBe('clid1')
+    expect(data[0].userName).toBe('Mathieu')
+    expect(data[0].status).toBe('success')
+    expect(data[0].created).toBe(3)
+    expect(data[0].log).toHaveLength(1)
+    expect(data[0].log[0].ref).toBe('REF-1')
+    expect(data[0].createdAt).toBe('2026-06-08T10:00:00.000Z')
+  })
+
+  it('retourne 500 si Prisma échoue', async () => {
+    mockFindMany.mockRejectedValue(new Error('DB error'))
+    const req = new NextRequest('http://localhost/api/sync/history')
+    const res = await GET(req)
+    expect(res.status).toBe(500)
+  })
+})

src/__tests__/api/sync/preview.test.ts

@@ -0,0 +1,64 @@
+import { GET } from '@/app/api/sync/preview/route'
+import { NextRequest } from 'next/server'
+import type { SyncProduct, ShopifyProductFull } from '@/types/sync'
+
+jest.mock('@/lib/googleSheets', () => ({
+  readSheetProducts: jest.fn(),
+}))
+jest.mock('@/lib/shopifySync', () => ({
+  fetchAllShopifyProducts: jest.fn(),
+}))
+jest.mock('@/lib/syncDiff', () => ({
+  computeDiff: jest.fn(),
+}))
+
+import { readSheetProducts } from '@/lib/googleSheets'
+import { fetchAllShopifyProducts } from '@/lib/shopifySync'
+import { computeDiff } from '@/lib/syncDiff'
+
+const mockSheets = readSheetProducts as jest.Mock
+const mockShopify = fetchAllShopifyProducts as jest.Mock
+const mockDiff = computeDiff as jest.Mock
+
+describe('GET /api/sync/preview', () => {
+  beforeEach(() => jest.clearAllMocks())
+
+  it('retourne le DiffResult complet', async () => {
+    const fakeSheetProducts: SyncProduct[] = [{ ref: 'REF-1', handle: 'ref-1', title: 'T', description: '', price: '10.00', stock: 1, status: 'active' }]
+    const fakeShopifyProducts: ShopifyProductFull[] = []
+    const fakeDiff = {
+      changes: [{ type: 'create', ref: 'REF-1', sheetProduct: fakeSheetProducts[0] }],
+      summary: { create: 1, update: 0, deactivate: 0, unchanged: 0 },
+    }
+
+    mockSheets.mockResolvedValue(fakeSheetProducts)
+    mockShopify.mockResolvedValue(fakeShopifyProducts)
+    mockDiff.mockReturnValue(fakeDiff)
+
+    const req = new NextRequest('http://localhost/api/sync/preview')
+    const res = await GET(req)
+
+    expect(res.status).toBe(200)
+    const data = await res.json()
+    expect(data.summary.create).toBe(1)
+    expect(data.changes).toHaveLength(1)
+    expect(mockDiff).toHaveBeenCalledWith(fakeSheetProducts, fakeShopifyProducts)
+  })
+
+  it('retourne 500 si Google Sheets échoue', async () => {
+    mockSheets.mockRejectedValue(new Error('Google Auth error'))
+    const req = new NextRequest('http://localhost/api/sync/preview')
+    const res = await GET(req)
+    expect(res.status).toBe(500)
+    const data = await res.json()
+    expect(data.error).toBeTruthy()
+  })
+
+  it('retourne 500 si Shopify échoue', async () => {
+    mockSheets.mockResolvedValue([])
+    mockShopify.mockRejectedValue(new Error('Shopify error'))
+    const req = new NextRequest('http://localhost/api/sync/preview')
+    const res = await GET(req)
+    expect(res.status).toBe(500)
+  })
+})

src/__tests__/lib/googleSheets.test.ts

@@ -0,0 +1,62 @@
+import { parseSheetRows } from '@/lib/googleSheets'
+
+describe('parseSheetRows', () => {
+  it('parse une ligne complète', () => {
+    const rows = [['REF-1042', 'Carrelage sol', 'Beau carrelage', '29.99', '15', 'actif']]
+    const result = parseSheetRows(rows)
+    expect(result).toHaveLength(1)
+    expect(result[0]).toEqual({
+      ref: 'REF-1042',
+      handle: 'ref-1042',
+      title: 'Carrelage sol',
+      description: 'Beau carrelage',
+      price: '29.99',
+      stock: 15,
+      status: 'active',
+    })
+  })
+
+  it('normalise le handle en minuscules avec tirets', () => {
+    const rows = [['ART 001/B', 'Produit', '', '10.00', '0', 'actif']]
+    const [p] = parseSheetRows(rows)
+    expect(p.handle).toBe('art-001-b')
+  })
+
+  it('ignore les lignes sans référence', () => {
+    const rows = [['', 'Titre vide', '', '0', '0', ''], ['REF-1', 'OK', '', '5.00', '1', 'actif']]
+    expect(parseSheetRows(rows)).toHaveLength(1)
+  })
+
+  it('gère un prix avec virgule (format français)', () => {
+    const rows = [['REF-2', 'Test', '', '19,99', '0', 'actif']]
+    expect(parseSheetRows(rows)[0].price).toBe('19.99')
+  })
+
+  it('marque comme draft si la colonne statut contient "inac"', () => {
+    const rows = [
+      ['REF-3', 'A', '', '1.00', '0', 'Inactif'],
+      ['REF-4', 'B', '', '1.00', '0', 'inactif'],
+      ['REF-5', 'C', '', '1.00', '0', 'actif'],
+      ['REF-6', 'D', '', '1.00', '0', ''],
+    ]
+    const results = parseSheetRows(rows)
+    expect(results[0].status).toBe('draft')
+    expect(results[1].status).toBe('draft')
+    expect(results[2].status).toBe('active')
+    expect(results[3].status).toBe('active')
+  })
+
+  it('utilise la référence comme titre si le titre est vide', () => {
+    const rows = [['REF-7', '', '', '5.00', '0', 'actif']]
+    expect(parseSheetRows(rows)[0].title).toBe('REF-7')
+  })
+
+  it('accepte des lignes avec colonnes manquantes', () => {
+    const rows = [['REF-8']]
+    const [p] = parseSheetRows(rows)
+    expect(p.ref).toBe('REF-8')
+    expect(p.price).toBe('0.00')
+    expect(p.stock).toBe(0)
+    expect(p.status).toBe('active')
+  })
+})

src/__tests__/lib/syncDiff.test.ts

@@ -0,0 +1,97 @@
+import { computeDiff } from '@/lib/syncDiff'
+import type { SyncProduct, ShopifyProductFull } from '@/types/sync'
+
+const sheet = (ref: string, overrides: Partial<SyncProduct> = {}): SyncProduct => ({
+  ref,
+  handle: ref.toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/^-+|-+$/g, ''),
+  title: `Produit ${ref}`,
+  description: 'Desc',
+  price: '10.00',
+  stock: 5,
+  status: 'active',
+  ...overrides,
+})
+
+const shopify = (ref: string, shopifyId = '111', overrides: Partial<ShopifyProductFull> = {}): ShopifyProductFull => ({
+  shopifyId,
+  ...sheet(ref, overrides),
+  ...overrides,
+})
+
+describe('computeDiff', () => {
+  it('retourne vide si aucun produit des deux côtés', () => {
+    const { changes, summary } = computeDiff([], [])
+    expect(changes).toHaveLength(0)
+    expect(summary).toEqual({ create: 0, update: 0, deactivate: 0, unchanged: 0 })
+  })
+
+  it('marque comme create si produit présent dans Sheets mais absent de Shopify', () => {
+    const { changes, summary } = computeDiff([sheet('REF-1')], [])
+    expect(changes).toHaveLength(1)
+    expect(changes[0].type).toBe('create')
+    expect(changes[0].ref).toBe('REF-1')
+    expect(summary.create).toBe(1)
+  })
+
+  it('marque comme unchanged si produits identiques', () => {
+    const s = sheet('REF-2')
+    const sp = shopify('REF-2')
+    const { changes, summary } = computeDiff([s], [sp])
+    expect(changes[0].type).toBe('unchanged')
+    expect(summary.unchanged).toBe(1)
+  })
+
+  it('marque comme update si le titre diffère', () => {
+    const s = sheet('REF-3', { title: 'Nouveau titre' })
+    const sp = shopify('REF-3', '222', { title: 'Ancien titre' })
+    const { changes } = computeDiff([s], [sp])
+    expect(changes[0].type).toBe('update')
+    expect(changes[0].changedFields).toContainEqual({
+      field: 'title',
+      from: 'Ancien titre',
+      to: 'Nouveau titre',
+    })
+  })
+
+  it('marque comme update si le prix diffère', () => {
+    const s = sheet('REF-4', { price: '25.00' })
+    const sp = shopify('REF-4', '333', { price: '20.00' })
+    const { changes } = computeDiff([s], [sp])
+    expect(changes[0].type).toBe('update')
+    expect(changes[0].changedFields).toContainEqual({ field: 'price', from: '20.00', to: '25.00' })
+  })
+
+  it('marque comme update si le statut diffère', () => {
+    const s = sheet('REF-5', { status: 'draft' })
+    const sp = shopify('REF-5', '444', { status: 'active' })
+    const { changes } = computeDiff([s], [sp])
+    expect(changes[0].type).toBe('update')
+  })
+
+  it('marque comme deactivate si produit ACTIF dans Shopify absent des Sheets', () => {
+    const sp = shopify('REF-6', '555', { status: 'active' })
+    const { changes, summary } = computeDiff([], [sp])
+    expect(changes[0].type).toBe('deactivate')
+    expect(summary.deactivate).toBe(1)
+  })
+
+  it("ne marque PAS comme deactivate si le produit Shopify est déjà draft", () => {
+    const sp = shopify('REF-7', '666', { status: 'draft' })
+    const { changes } = computeDiff([], [sp])
+    expect(changes).toHaveLength(0)
+  })
+
+  it('calcule le résumé correctement sur un mix de changements', () => {
+    const sheetProducts = [sheet('REF-A'), sheet('REF-B', { title: 'Modifié' }), sheet('REF-C')]
+    const shopifyProducts = [
+      shopify('REF-B', '10', { title: 'Original' }),
+      shopify('REF-C', '11'),
+      shopify('REF-D', '12', { status: 'active' }),
+    ]
+    const { summary } = computeDiff(sheetProducts, shopifyProducts)
+    expect(summary.create).toBe(1)    // REF-A
+    expect(summary.update).toBe(1)    // REF-B
+    expect(summary.unchanged).toBe(1) // REF-C
+    expect(summary.deactivate).toBe(1) // REF-D
+  })
+})

src/app/(dashboard)/bannieres/page.tsx

@@ -0,0 +1,297 @@
+'use client'
+import { useState, useEffect, useRef, useCallback } from 'react'
+import { Header } from '@/components/layout/Header'
+import { BannerBuilder } from '@/components/bannieres/BannerBuilder'
+import type { SlideshowSection, Slide } from '@/lib/shopifyTheme'
+
+// Convertit "shopify://shop_images/foo.jpg" → URL CDN prévisualisable via proxy
+function shopifyRefToProxyUrl(ref: string): string {
+  if (!ref) return ''
+  const filename = ref.replace('shopify://shop_images/', '')
+  return `/api/images/proxy?url=${encodeURIComponent(`https://cdn.shopify.com/s/files/1/0897/7373/6263/files/${filename}`)}`
+}
+
+function blobToBase64(blob: Blob): Promise<string> {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader()
+    reader.onload = () => resolve((reader.result as string).split(',')[1])
+    reader.onerror = reject
+    reader.readAsDataURL(blob)
+  })
+}
+
+interface SlideCardProps {
+  slide: Slide
+  index: number
+  total: number
+  onMoveUp: () => void
+  onMoveDown: () => void
+  onRemove: () => void
+  onChangeImage: (shopifyRef: string) => void
+  onChangeLink: (link: string) => void
+  onOpenBuilder: () => void
+}
+
+function SlideCard({ slide, index, total, onMoveUp, onMoveDown, onRemove, onChangeImage, onChangeLink, onOpenBuilder }: SlideCardProps) {
+  const fileRef = useRef<HTMLInputElement>(null)
+  const [uploading, setUploading] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+
+  const handleFile = async (e: React.ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0]
+    if (!file) return
+    setUploading(true)
+    setError(null)
+    try {
+      const base64 = await blobToBase64(file)
+      const res = await fetch('/api/theme/upload-file', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ imageBase64: base64, filename: file.name }),
+      })
+      const data = await res.json()
+      if (!res.ok) throw new Error(data.error)
+      onChangeImage(data.shopifyRef)
+    } catch (err) {
+      setError((err as Error).message)
+    } finally {
+      setUploading(false)
+      e.target.value = ''
+    }
+  }
+
+  const previewUrl = shopifyRefToProxyUrl(slide.settings.image)
+
+  return (
+    <div className="bg-slate-800 border border-slate-700 rounded-xl overflow-hidden">
+      {/* Image preview */}
+      <div className="relative h-44 bg-slate-900">
+        {previewUrl ? (
+          <img src={previewUrl} alt={`Slide ${index + 1}`} className="w-full h-full object-cover" />
+        ) : (
+          <div className="w-full h-full flex items-center justify-center text-slate-600 text-sm">
+            Aucune image
+          </div>
+        )}
+        <div className="absolute top-2 left-2 bg-black/60 text-white text-xs px-2 py-0.5 rounded-full">
+          {index + 1} / {total}
+        </div>
+      </div>
+
+      {/* Controls */}
+      <div className="p-3 space-y-2">
+        {/* Link */}
+        <div>
+          <label className="block text-xs text-slate-400 mb-1">Lien (optionnel)</label>
+          <input
+            type="text"
+            value={slide.settings.link ?? ''}
+            onChange={e => onChangeLink(e.target.value)}
+            placeholder="https://…"
+            className="w-full bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-xs text-white focus:outline-none focus:ring-1 focus:ring-indigo-500"
+          />
+        </div>
+
+        {error && <p className="text-xs text-red-400">{error}</p>}
+
+        {/* Actions */}
+        <div className="flex gap-1.5 flex-wrap">
+          <button
+            onClick={onOpenBuilder}
+            className="flex-1 py-1.5 text-xs bg-purple-700 hover:bg-purple-600 text-white rounded font-medium"
+          >
+            🎨 Créer une bannière
+          </button>
+          <button
+            onClick={() => fileRef.current?.click()}
+            disabled={uploading}
+            className="py-1.5 px-2 text-xs bg-indigo-600 hover:bg-indigo-500 text-white rounded font-medium disabled:opacity-50"
+            title="Uploader une image"
+          >
+            {uploading ? '…' : '🖼️'}
+          </button>
+          <input ref={fileRef} type="file" accept="image/*" className="hidden" onChange={handleFile} />
+          <button
+            onClick={onMoveUp}
+            disabled={index === 0}
+            className="py-1.5 px-2 text-xs bg-slate-700 hover:bg-slate-600 text-slate-300 rounded disabled:opacity-30"
+            title="Monter"
+          >↑</button>
+          <button
+            onClick={onMoveDown}
+            disabled={index === total - 1}
+            className="py-1.5 px-2 text-xs bg-slate-700 hover:bg-slate-600 text-slate-300 rounded disabled:opacity-30"
+            title="Descendre"
+          >↓</button>
+          <button
+            onClick={onRemove}
+            className="py-1.5 px-2 text-xs bg-slate-700 hover:bg-red-900 text-slate-400 hover:text-red-300 rounded"
+            title="Supprimer"
+          >✕</button>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default function BannièresPage() {
+  const [slideshow, setSlideshow] = useState<SlideshowSection | null>(null)
+  const [themeId, setThemeId] = useState<string>('')
+  const [loading, setLoading] = useState(true)
+  const [saving, setSaving] = useState(false)
+  const [saved, setSaved] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+  // Index de la slide cible du builder (-1 = nouvelle slide)
+  const [builderTargetIndex, setBuilderTargetIndex] = useState<number | null>(null)
+
+  useEffect(() => {
+    fetch('/api/theme/slideshow')
+      .then(r => r.json())
+      .then(d => {
+        if (d.error) throw new Error(d.error)
+        setSlideshow(d.slideshow)
+        setThemeId(d.themeId)
+      })
+      .catch(e => setError(e.message))
+      .finally(() => setLoading(false))
+  }, [])
+
+  const update = useCallback((fn: (s: SlideshowSection) => SlideshowSection) => {
+    setSlideshow(prev => prev ? fn(prev) : prev)
+    setSaved(false)
+  }, [])
+
+  const moveSlide = (index: number, dir: -1 | 1) => {
+    update(s => {
+      const slides = [...s.slides]
+      const tmp = slides[index]
+      slides[index] = slides[index + dir]
+      slides[index + dir] = tmp
+      return { ...s, slides }
+    })
+  }
+
+  const removeSlide = (index: number) => {
+    update(s => ({ ...s, slides: s.slides.filter((_, i) => i !== index) }))
+  }
+
+  const addSlide = () => {
+    update(s => ({
+      ...s,
+      slides: [...s.slides, {
+        blockId: `slide_${Math.random().toString(36).slice(2, 8)}`,
+        settings: { image: '', link: '' },
+      }],
+    }))
+  }
+
+  const changeImage = (index: number, shopifyRef: string) => {
+    update(s => {
+      const slides = s.slides.map((sl, i) =>
+        i === index ? { ...sl, settings: { ...sl.settings, image: shopifyRef } } : sl
+      )
+      return { ...s, slides }
+    })
+  }
+
+  const changeLink = (index: number, link: string) => {
+    update(s => {
+      const slides = s.slides.map((sl, i) =>
+        i === index ? { ...sl, settings: { ...sl.settings, link } } : sl
+      )
+      return { ...s, slides }
+    })
+  }
+
+  const save = async () => {
+    if (!slideshow) return
+    setSaving(true)
+    setError(null)
+    try {
+      const res = await fetch('/api/theme/slideshow', {
+        method: 'PUT',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ slideshow, themeId }),
+      })
+      const data = await res.json()
+      if (!res.ok) throw new Error(data.error)
+      setSaved(true)
+    } catch (err) {
+      setError((err as Error).message)
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  return (
+    <>
+      <Header
+        title="Bannières homepage"
+        actions={
+          <div className="flex items-center gap-3">
+            {saved && <span className="text-xs text-green-400">✓ Publié sur Shopify</span>}
+            {error && <span className="text-xs text-red-400">{error}</span>}
+            <button
+              onClick={addSlide}
+              disabled={!slideshow}
+              className="px-3 py-1.5 text-xs bg-slate-700 hover:bg-slate-600 text-white rounded font-medium disabled:opacity-40"
+            >
+              + Ajouter une slide
+            </button>
+            <button
+              onClick={save}
+              disabled={!slideshow || saving}
+              className="px-4 py-1.5 text-xs bg-green-700 hover:bg-green-600 text-white rounded font-medium disabled:opacity-40"
+            >
+              {saving ? 'Publication…' : '🚀 Publier sur Shopify'}
+            </button>
+          </div>
+        }
+      />
+      <div className="p-6">
+        {loading && (
+          <div className="text-center py-12 text-slate-500 text-sm">Chargement du thème…</div>
+        )}
+        {!loading && !slideshow && (
+          <div className="text-center py-12 text-red-400 text-sm">
+            Section slideshow-custom introuvable dans le thème actif.
+          </div>
+        )}
+        {slideshow && (
+          <div className="space-y-4">
+            <p className="text-xs text-slate-500">
+              {slideshow.slides.length} slide{slideshow.slides.length > 1 ? 's' : ''} · Thème actif (Meka)
+            </p>
+            <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-4">
+              {slideshow.slides.map((slide, i) => (
+                <SlideCard
+                  key={slide.blockId}
+                  slide={slide}
+                  index={i}
+                  total={slideshow.slides.length}
+                  onMoveUp={() => moveSlide(i, -1)}
+                  onMoveDown={() => moveSlide(i, 1)}
+                  onRemove={() => removeSlide(i)}
+                  onChangeImage={ref => changeImage(i, ref)}
+                  onChangeLink={link => changeLink(i, link)}
+                  onOpenBuilder={() => setBuilderTargetIndex(i)}
+                />
+              ))}
+            </div>
+          </div>
+        )}
+      </div>
+
+      {builderTargetIndex !== null && (
+        <BannerBuilder
+          onApply={shopifyRef => {
+            if (builderTargetIndex !== null) changeImage(builderTargetIndex, shopifyRef)
+            setBuilderTargetIndex(null)
+            setSaved(false)
+          }}
+          onClose={() => setBuilderTargetIndex(null)}
+        />
+      )}
+    </>
+  )
+}

src/app/(dashboard)/creation/page.tsx

@@ -0,0 +1,419 @@
+'use client'
+import { useState, useCallback, useEffect, useRef } from 'react'
+import { Header } from '@/components/layout/Header'
+import { PendingRowsTable } from '@/components/creation/PendingRowsTable'
+import { MetafieldResolver } from '@/components/creation/MetafieldResolver'
+import { CreationProgress } from '@/components/creation/CreationProgress'
+import { FamilySelector } from '@/components/common/FamilySelector'
+import type { PendingProduct, MetafieldResolution, CreationStreamEvent } from '@/types/creation'
+
+type Step = 'famille' | 'analyse' | 'metafields' | 'confirmation' | 'execution'
+
+interface ShopifyCollection { id: string; title: string }
+
+export default function CreationPage() {
+  const [step, setStep] = useState<Step>('famille')
+  const [selectedTab, setSelectedTab] = useState<string | null>(null)
+  const [loading, setLoading] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+  const [byTab, setByTab] = useState<Record<string, PendingProduct[]>>({})
+  const [total, setTotal] = useState(0)
+  const [specificColumns, setSpecificColumns] = useState<string[]>([])
+  const [resolutions, setResolutions] = useState<MetafieldResolution[]>([])
+  const [events, setEvents] = useState<CreationStreamEvent[]>([])
+  const [done, setDone] = useState(false)
+  const [stopped, setStopped] = useState(false)
+  const abortRef = useRef<AbortController | null>(null)
+
+  // Sync stock
+  const [stockSyncing, setStockSyncing] = useState(false)
+  const [stockResult, setStockResult] = useState<{ updated: number; errors: number; fatalError?: string } | null>(null)
+  const [stockProgress, setStockProgress] = useState<{ current: number; total: number; title?: string } | null>(null)
+
+  const runStockStream = async (url: string, setter: typeof setStockResult) => {
+    const res = await fetch(url, { method: 'POST', headers: { 'Content-Type': 'application/json' }, credentials: 'include', body: '{}' })
+    if (!res.body) return
+    const reader = res.body.getReader()
+    const decoder = new TextDecoder()
+    let buffer = ''
+    while (true) {
+      const { done, value } = await reader.read()
+      if (done) break
+      buffer += decoder.decode(value, { stream: true })
+      const lines = buffer.split('\n')
+      buffer = lines.pop() ?? ''
+      for (const line of lines) {
+        if (!line.trim()) continue
+        try {
+          const evt = JSON.parse(line)
+          if (evt.type === 'progress') setStockProgress({ current: evt.current, total: evt.total, title: evt.title })
+          if (evt.type === 'done') setter({ updated: evt.updated, errors: evt.errors, fatalError: evt.fatalError })
+        } catch { /* */ }
+      }
+    }
+  }
+
+  const syncStock = async () => {
+    setStockSyncing(true)
+    setStockResult(null)
+    setStockProgress(null)
+    try { await runStockStream('/api/creation/sync-stock', setStockResult) }
+    finally { setStockSyncing(false); setStockProgress(null) }
+  }
+
+  const [stockReverseSyncing, setStockReverseSyncing] = useState(false)
+  const [stockReverseResult, setStockReverseResult] = useState<{ updated: number; errors: number; fatalError?: string } | null>(null)
+
+  const syncStockReverse = async () => {
+    setStockReverseSyncing(true)
+    setStockReverseResult(null)
+    setStockProgress(null)
+    try { await runStockStream('/api/creation/sync-stock-reverse', setStockReverseResult) }
+    finally { setStockReverseSyncing(false); setStockProgress(null) }
+  }
+
+  // Collection
+  const [collections, setCollections] = useState<ShopifyCollection[]>([])
+  const [detectedCollectionId, setDetectedCollectionId] = useState<string>('')
+  const [collectionOverride, setCollectionOverride] = useState<string>('')
+  const [collectionSearch, setCollectionSearch] = useState('')
+  const [loadingCollections, setLoadingCollections] = useState(false)
+
+  useEffect(() => {
+    setLoadingCollections(true)
+    fetch('/api/creation/collections')
+      .then(r => r.json())
+      .then(d => setCollections(d.collections ?? []))
+      .finally(() => setLoadingCollections(false))
+  }, [])
+
+  const handleSelectTab = (tab: string) => {
+    setSelectedTab(tab)
+    setStep('analyse')
+    setDetectedCollectionId('')
+    setCollectionOverride('')
+    setCollectionSearch('')
+  }
+
+  const analyse = async () => {
+    setLoading(true)
+    setError(null)
+    try {
+      const url = selectedTab
+        ? `/api/creation/preview?tab=${encodeURIComponent(selectedTab)}`
+        : '/api/creation/preview'
+      const res = await fetch(url)
+      const data = await res.json()
+      if (data.error) throw new Error(data.error)
+      setByTab(data.byTab)
+      setTotal(data.total)
+      setSpecificColumns(data.specificColumns)
+
+      // Détecter la collection depuis les produits analysés
+      const products: PendingProduct[] = Object.values(data.byTab as Record<string, PendingProduct[]>).flat()
+      const ids = Array.from(new Set(products.map(p => p.collectionId).filter(Boolean)))
+      if (ids.length === 1) {
+        setDetectedCollectionId(ids[0])
+        setCollectionOverride(ids[0])
+      } else {
+        setDetectedCollectionId('')
+        setCollectionOverride('')
+      }
+      setStep('metafields')
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Erreur')
+    } finally {
+      setLoading(false)
+    }
+  }
+
+  const handleResolved = useCallback((r: MetafieldResolution[]) => { setResolutions(r) }, [])
+
+  const stop = useCallback(() => {
+    abortRef.current?.abort()
+    setStopped(true)
+    setDone(true)
+  }, [])
+
+  const execute = async () => {
+    const controller = new AbortController()
+    abortRef.current = controller
+    setStep('execution')
+    setEvents([])
+    setDone(false)
+    setStopped(false)
+    try {
+      const res = await fetch('/api/creation/execute', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ resolutions, tab: selectedTab, collectionOverride: collectionOverride || undefined }),
+        signal: controller.signal,
+      })
+      if (!res.body) return
+      const reader = res.body.getReader()
+      const decoder = new TextDecoder()
+      let buffer = ''
+      while (true) {
+        const { done: readerDone, value } = await reader.read()
+        if (readerDone) break
+        buffer += decoder.decode(value, { stream: true })
+        const lines = buffer.split('\n')
+        buffer = lines.pop() ?? ''
+        for (const line of lines) {
+          if (!line.trim()) continue
+          try {
+            const event = JSON.parse(line) as CreationStreamEvent
+            setEvents(prev => [...prev, event])
+            if (event.type === 'done') setDone(true)
+          } catch { /* ligne incomplète */ }
+        }
+      }
+    } catch (e) {
+      if ((e as Error).name !== 'AbortError') {
+        setEvents(prev => [...prev, { type: 'error', title: '', message: (e as Error).message }])
+      }
+    }
+    setDone(true)
+  }
+
+  const STEPS: { id: Step; label: string }[] = [
+    { id: 'analyse', label: 'Analyse' },
+    { id: 'metafields', label: 'Métachamps' },
+    { id: 'confirmation', label: 'Confirmation' },
+    { id: 'execution', label: 'Exécution' },
+  ]
+  const currentIdx = STEPS.findIndex(s => s.id === step)
+
+  const reset = () => {
+    abortRef.current?.abort()
+    abortRef.current = null
+    setStep('famille')
+    setSelectedTab(null)
+    setEvents([])
+    setDone(false)
+    setStopped(false)
+    setByTab({})
+    setTotal(0)
+    setDetectedCollectionId('')
+    setCollectionOverride('')
+  }
+
+  const filteredCollections = collectionSearch
+    ? collections.filter(c => c.title.toLowerCase().includes(collectionSearch.toLowerCase()))
+    : collections
+
+  const selectedCollection = collections.find(c => c.id === collectionOverride)
+
+  return (
+    <>
+      <Header title="Création produits" />
+      <div className="p-6 space-y-6">
+        <div className="flex gap-2">
+          {STEPS.map((s, i) => (
+            <div key={s.id} className="flex items-center gap-2">
+              <span className={`px-3 py-1 rounded-full text-xs font-medium ${step === s.id ? 'bg-indigo-600 text-white' : i < currentIdx ? 'bg-green-700 text-white' : 'bg-slate-700 text-gray-400'}`}>
+                {i + 1}. {s.label}
+              </span>
+              {i < STEPS.length - 1 && <span className="text-gray-600">→</span>}
+            </div>
+          ))}
+        </div>
+
+        {/* Étape 0 — Sélection famille */}
+        {step === 'famille' && (
+          <div className="space-y-4">
+            <div className="bg-slate-800 rounded-xl p-6">
+              <h2 className="text-sm font-semibold text-white mb-4">Choisir une famille</h2>
+              <FamilySelector onSelect={handleSelectTab} />
+            </div>
+            <div className="bg-slate-800 rounded-xl p-6 space-y-6">
+              <div>
+                <h2 className="text-sm font-semibold text-white mb-1">Sheets → Shopify</h2>
+                <p className="text-xs text-gray-400 mb-3">Met à jour le stock Shopify depuis les valeurs du Sheets.</p>
+                <button onClick={syncStock} disabled={stockSyncing || stockReverseSyncing}
+                  className="px-4 py-2 bg-amber-700 hover:bg-amber-600 disabled:opacity-50 text-white rounded-lg text-sm font-medium transition-colors">
+                  {stockSyncing ? (stockProgress ? `Mise à jour… ${stockProgress.current}/${stockProgress.total}` : 'Chargement…') : 'Synchroniser Sheets → Shopify'}
+                </button>
+                {stockSyncing && stockProgress?.title && (
+                  <p className="mt-2 text-xs text-gray-400 truncate">→ {stockProgress.title}</p>
+                )}
+                {stockResult && (
+                  <div className="mt-2 text-sm">
+                    {stockResult.fatalError
+                      ? <p className="text-red-400">✕ {stockResult.fatalError}</p>
+                      : stockResult.errors === 0
+                        ? <p className="text-green-400">✓ {stockResult.updated} produit{stockResult.updated > 1 ? 's' : ''} mis à jour</p>
+                        : <p className="text-amber-400">✓ {stockResult.updated} mis à jour — ⚠ {stockResult.errors} erreur{stockResult.errors > 1 ? 's' : ''}</p>
+                    }
+                  </div>
+                )}
+              </div>
+              <hr className="border-slate-700" />
+              <div>
+                <h2 className="text-sm font-semibold text-white mb-1">Shopify → Sheets</h2>
+                <p className="text-xs text-gray-400 mb-3">Écrase les stocks du Sheets avec les valeurs actuelles de Shopify.</p>
+                <button onClick={syncStockReverse} disabled={stockSyncing || stockReverseSyncing}
+                  className="px-4 py-2 bg-blue-700 hover:bg-blue-600 disabled:opacity-50 text-white rounded-lg text-sm font-medium transition-colors">
+                  {stockReverseSyncing ? (stockProgress ? `Lecture… ${stockProgress.current}/${stockProgress.total}` : 'Chargement…') : 'Synchroniser Shopify → Sheets'}
+                </button>
+                {stockReverseSyncing && stockProgress && (
+                  <p className="mt-2 text-xs text-gray-400">→ {stockProgress.current}/{stockProgress.total}</p>
+                )}
+                {stockReverseResult && (
+                  <div className="mt-2 text-sm">
+                    {stockReverseResult.fatalError
+                      ? <p className="text-red-400">✕ {stockReverseResult.fatalError}</p>
+                      : stockReverseResult.errors === 0
+                        ? <p className="text-green-400">✓ {stockReverseResult.updated} produit{stockReverseResult.updated > 1 ? 's' : ''} mis à jour dans le Sheets</p>
+                        : <p className="text-amber-400">✓ {stockReverseResult.updated} mis à jour — ⚠ {stockReverseResult.errors} erreur{stockReverseResult.errors > 1 ? 's' : ''}</p>
+                    }
+                  </div>
+                )}
+              </div>
+            </div>
+          </div>
+        )}
+
+        <div className="bg-slate-800 rounded-xl p-6" style={{ display: step === 'famille' ? 'none' : undefined }}>
+          {error && <div className="mb-4 p-3 bg-red-900/30 border border-red-700 rounded-lg text-red-300 text-sm">{error}</div>}
+
+          {step === 'analyse' && (
+            <div className="space-y-4">
+              <div className="flex items-center gap-2 bg-indigo-950/50 border border-indigo-800/50 rounded-lg px-3 py-2 w-fit">
+                <span className="text-indigo-400 text-sm">📂 Famille :</span>
+                <span className="text-white text-sm font-semibold">{selectedTab}</span>
+                <button onClick={() => { setStep('famille'); setSelectedTab(null) }} className="ml-2 text-xs text-slate-400 hover:text-slate-200">changer</button>
+              </div>
+              <p className="text-gray-300 text-sm">
+                Détecte les lignes de <strong className="text-white">{selectedTab}</strong> où <code className="text-indigo-300">Publié=1</code> et <code className="text-indigo-300">ID vide</code>.
+              </p>
+              <button onClick={analyse} disabled={loading}
+                className="px-4 py-2 bg-indigo-600 hover:bg-indigo-700 disabled:opacity-50 text-white rounded-lg text-sm font-medium transition-colors">
+                {loading ? 'Analyse en cours…' : 'Analyser le Sheets'}
+              </button>
+            </div>
+          )}
+
+          {step === 'metafields' && (
+            <div className="space-y-6">
+              <PendingRowsTable byTab={byTab} total={total} />
+              {total > 0 && (
+                <>
+                  <hr className="border-slate-700" />
+
+                  {/* Collection Shopify */}
+                  <div>
+                    <h2 className="text-base font-semibold text-white mb-1">Collection Shopify</h2>
+                    {detectedCollectionId ? (
+                      <div className="flex items-center gap-2 mb-2">
+                        <span className="text-xs text-green-400">✓ Détectée depuis le Sheets :</span>
+                        <span className="text-xs text-white font-medium">
+                          {collections.find(c => c.id === detectedCollectionId)?.title ?? `ID ${detectedCollectionId}`}
+                        </span>
+                        <button type="button" onClick={() => { setDetectedCollectionId(''); setCollectionOverride('') }}
+                          className="text-xs text-gray-500 hover:text-gray-300">modifier</button>
+                      </div>
+                    ) : (
+                      <p className="text-xs text-amber-400 mb-2">⚠ Aucune collection détectée dans le Sheets — choisissez-en une :</p>
+                    )}
+                    {(!detectedCollectionId || collectionOverride !== detectedCollectionId) && (
+                      <div className="space-y-2">
+                        {selectedCollection && (
+                          <div className="flex items-center gap-2">
+                            <span className="text-xs text-blue-300 font-medium">→ {selectedCollection.title}</span>
+                            <button type="button" onClick={() => setCollectionOverride('')}
+                              className="text-xs text-gray-500 hover:text-gray-300">✕</button>
+                          </div>
+                        )}
+                        <input
+                          type="text"
+                          value={collectionSearch}
+                          onChange={e => setCollectionSearch(e.target.value)}
+                          placeholder={loadingCollections ? 'Chargement…' : 'Rechercher une collection Shopify…'}
+                          className="w-full max-w-sm bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-sm text-white focus:outline-none focus:ring-1 focus:ring-indigo-500"
+                        />
+                        {collectionSearch && filteredCollections.length > 0 && (
+                          <div className="max-w-sm bg-slate-700 border border-slate-600 rounded shadow-lg max-h-48 overflow-y-auto">
+                            {filteredCollections.map(c => (
+                              <button key={c.id} type="button"
+                                onClick={() => { setCollectionOverride(c.id); setCollectionSearch('') }}
+                                className="w-full text-left px-3 py-1.5 text-sm text-white hover:bg-slate-600">
+                                {c.title}
+                              </button>
+                            ))}
+                          </div>
+                        )}
+                        {collectionSearch && filteredCollections.length === 0 && (
+                          <p className="text-xs text-gray-400">Aucune collection trouvée</p>
+                        )}
+                      </div>
+                    )}
+                  </div>
+
+                  <hr className="border-slate-700" />
+                  <div>
+                    <h2 className="text-base font-semibold text-white mb-3">Résolution des métachamps</h2>
+                    <MetafieldResolver specificColumns={specificColumns} onResolved={handleResolved} />
+                  </div>
+                  <button onClick={() => setStep('confirmation')}
+                    className="px-4 py-2 bg-indigo-600 hover:bg-indigo-700 text-white rounded-lg text-sm font-medium transition-colors">
+                    Continuer →
+                  </button>
+                </>
+              )}
+            </div>
+          )}
+
+          {step === 'confirmation' && (
+            <div className="space-y-4">
+              <div className="space-y-2 text-sm">
+                <p className="text-gray-300"><span className="text-white font-medium">{total} produit{total > 1 ? 's' : ''}</span> à créer dans Shopify</p>
+                <p className="text-gray-300">
+                  Collection : <span className="text-white font-medium">
+                    {collections.find(c => c.id === collectionOverride)?.title ?? (collectionOverride ? `ID ${collectionOverride}` : <span className="text-amber-400">Aucune</span>)}
+                  </span>
+                </p>
+                <p className="text-gray-300"><span className="text-white font-medium">{resolutions.filter(r => r.action !== 'skip').length}</span> type{resolutions.filter(r => r.action !== 'skip').length > 1 ? 's' : ''} de métachamps à assigner</p>
+                <p className="text-gray-300"><span className="text-white font-medium">{resolutions.filter(r => r.action === 'create').length}</span> nouvelle{resolutions.filter(r => r.action === 'create').length > 1 ? 's' : ''} définition{resolutions.filter(r => r.action === 'create').length > 1 ? 's' : ''} à créer dans Shopify</p>
+                <p className="text-yellow-300 text-xs mt-2">⚠ Les descriptions seront générées par OpenAI GPT-4o (~0.01$ par produit)</p>
+              </div>
+              <div className="flex gap-3">
+                <button onClick={() => setStep('metafields')}
+                  className="px-4 py-2 bg-slate-700 hover:bg-slate-600 text-gray-300 rounded-lg text-sm font-medium transition-colors">
+                  ← Retour
+                </button>
+                <button onClick={execute}
+                  className="px-4 py-2 bg-green-700 hover:bg-green-600 text-white rounded-lg text-sm font-medium transition-colors">
+                  Lancer la création ({total} produits)
+                </button>
+              </div>
+            </div>
+          )}
+
+          {step === 'execution' && (
+            <div className="space-y-4">
+              <CreationProgress events={events} done={done} />
+              <div className="flex gap-3">
+                {!done && (
+                  <button onClick={stop}
+                    className="px-4 py-2 bg-red-700 hover:bg-red-600 text-white rounded-lg text-sm font-medium transition-colors">
+                    ⏹ Arrêter
+                  </button>
+                )}
+                {done && (
+                  <>
+                    {stopped && <p className="text-amber-400 text-sm self-center">⚠ Création interrompue — les produits déjà créés sont conservés dans Shopify.</p>}
+                    <button onClick={reset}
+                      className="px-4 py-2 bg-indigo-600 hover:bg-indigo-700 text-white rounded-lg text-sm font-medium transition-colors">
+                      Nouvelle session
+                    </button>
+                  </>
+                )}
+              </div>
+            </div>
+          )}
+        </div>
+      </div>
+    </>
+  )
+}

src/app/(dashboard)/images/page.tsx

@@ -1,9 +1,200 @@
+'use client'
+import { useState, useCallback } from 'react'
 import { Header } from '@/components/layout/Header'
-export default function ImagesPage() {
+import { DropZone } from '@/components/images/DropZone'
+import { ImageCard } from '@/components/images/ImageCard'
+import { Lightbox } from '@/components/images/Lightbox'
+import { GlobalActions } from '@/components/images/GlobalActions'
+import { MockupModalFromImage } from '@/components/mockup/MockupModalFromImage'
+import { ErrorBoundary } from '@/components/common/ErrorBoundary'
+import { useImages } from '@/hooks/useImages'
+import type { ImageItem } from '@/types/images'
+
+function ImagesPageInner() {
+  const { items, addFiles, setFeather, setAlphaThreshold, rotate, uploadOne, uploadAll, uploadSelected, removeItem, assignProduct, reprocess, detour } = useImages()
+  const [lightboxItem, setLightboxItem] = useState<ImageItem | null>(null)
+  const [mockupItem, setMockupItem] = useState<ImageItem | null>(null)
+  const [selected, setSelected] = useState<Set<string>>(new Set())
+  const [uploadingSelected, setUploadingSelected] = useState(false)
+
+  const openMockup = useCallback((id: string) => {
+    const item = items.find(i => i.id === id)
+    if (item) setMockupItem(item)
+  }, [items])
+
+  const toggleSelect = useCallback((id: string, value: boolean) => {
+    setSelected(prev => {
+      const next = new Set(prev)
+      if (value) next.add(id)
+      else next.delete(id)
+      return next
+    })
+  }, [])
+
+  const clearSelection = useCallback(() => setSelected(new Set()), [])
+
+  const selectAllDetourable = useCallback(() => {
+    const ids = items
+      .filter(i => i.status === 'converted' || i.status === 'not_found' || i.status === 'error')
+      .map(i => i.id) as string[]
+    setSelected(new Set(ids))
+  }, [items])
+
+  const selectAllUploadable = useCallback(() => {
+    const ids = items
+      .filter(i => (i.status === 'ready' || i.status === 'converted') && !!i.shopifyProductId)
+      .map(i => i.id) as string[]
+    setSelected(new Set(ids))
+  }, [items])
+
+  const detourSelected = useCallback(() => {
+    Array.from(selected).forEach(id => detour(id))
+    setSelected(new Set())
+  }, [selected, detour])
+
+  const handleUploadSelected = useCallback(async () => {
+    setUploadingSelected(true)
+    await uploadSelected(selected)
+    setUploadingSelected(false)
+    setSelected(new Set())
+  }, [selected, uploadSelected])
+
+  const selectedDetourable = Array.from(selected).filter(id => {
+    const item = items.find(i => i.id === id)
+    return item && (item.status === 'converted' || item.status === 'not_found' || item.status === 'error')
+  })
+  const selectedUploadable = Array.from(selected).filter(id => {
+    const item = items.find(i => i.id === id)
+    return item && (item.status === 'ready' || item.status === 'converted') && !!item.shopifyProductId
+  })
+
+  const detourable = items.filter(i =>
+    i.status === 'converted' || i.status === 'not_found' || i.status === 'error'
+  )
+  const uploadable = items.filter(i =>
+    (i.status === 'ready' || i.status === 'converted') && !!i.shopifyProductId
+  )
+
+  const showSelectionBar = detourable.length > 0 || uploadable.length > 0
+
   return (
     <>
-      <Header title="🖼️ Images" />
+      <Header
-      <div className="p-6"><p className="text-gray-400 text-sm">Module Images — à implémenter (Plan 2)</p></div>
+        title="🖼️ Images"
+        actions={
+          <span className="text-xs text-slate-500">
+            {items.length > 0 ? `${items.length} image${items.length > 1 ? 's' : ''}` : ''}
+          </span>
+        }
+      />
+
+      <div className="p-6 flex flex-col gap-4 flex-1 overflow-y-auto">
+        <DropZone onFiles={addFiles} />
+
+        {items.length > 0 && (
+          <GlobalActions items={items} onUploadAll={uploadAll} />
+        )}
+
+        {/* Barre de sélection multiple */}
+        {showSelectionBar && (
+          <div className="flex items-center gap-2 px-3 py-2 bg-slate-800 rounded-lg border border-slate-700 flex-wrap">
+            {/* Compteurs et raccourcis de sélection */}
+            <div className="flex items-center gap-2 text-xs text-slate-400">
+              {detourable.length > 0 && (
+                <button onClick={selectAllDetourable} className="hover:text-purple-300 transition-colors">
+                  Sélectionner à détourer ({detourable.length})
+                </button>
+              )}
+              {detourable.length > 0 && uploadable.length > 0 && (
+                <span className="text-slate-600">·</span>
+              )}
+              {uploadable.length > 0 && (
+                <button onClick={selectAllUploadable} className="hover:text-indigo-300 transition-colors">
+                  Sélectionner à uploader ({uploadable.length})
+                </button>
+              )}
+            </div>
+
+            {/* Actions sur la sélection */}
+            {selected.size > 0 && (
+              <>
+                <span className="text-slate-600 text-xs">|</span>
+                <span className="text-xs text-white font-medium">
+                  {selected.size} sélectionnée{selected.size > 1 ? 's' : ''}
+                </span>
+                <div className="ml-auto flex items-center gap-2">
+                  {selectedDetourable.length > 0 && (
+                    <button
+                      onClick={detourSelected}
+                      className="px-3 py-1 text-xs bg-purple-700 hover:bg-purple-600 text-white font-semibold rounded"
+                    >
+                      ✂️ Détourer ({selectedDetourable.length})
+                    </button>
+                  )}
+                  {selectedUploadable.length > 0 && (
+                    <button
+                      onClick={handleUploadSelected}
+                      disabled={uploadingSelected}
+                      className="px-3 py-1 text-xs bg-indigo-600 hover:bg-indigo-500 text-white font-semibold rounded disabled:opacity-50"
+                    >
+                      {uploadingSelected
+                        ? `⬆️ Upload en cours…`
+                        : `⬆️ Uploader (${selectedUploadable.length})`}
+                    </button>
+                  )}
+                  <button onClick={clearSelection} className="text-xs text-slate-500 hover:text-slate-300">
+                    ✕
+                  </button>
+                </div>
+              </>
+            )}
+          </div>
+        )}
+
+        {items.length > 0 && (
+          <div className="grid grid-cols-2 md:grid-cols-3 lg:grid-cols-4 xl:grid-cols-5 gap-4">
+            {items.map((item) => (
+              <ImageCard
+                key={item.id}
+                item={item}
+                selected={selected.has(item.id)}
+                onSelect={toggleSelect}
+                onFeatherChange={setFeather}
+                onAlphaThresholdChange={setAlphaThreshold}
+                onRotate={rotate}
+                onUpload={uploadOne}
+                onRemove={removeItem}
+                onOpenLightbox={setLightboxItem}
+                onAssignProduct={assignProduct}
+                onReprocess={reprocess}
+                onDetour={detour}
+                onMockup={openMockup}
+              />
+            ))}
+          </div>
+        )}
+
+        {items.length === 0 && (
+          <div className="text-center py-12 text-slate-600">
+            <p className="text-4xl mb-3">📂</p>
+            <p className="text-sm">Déposez des images pour commencer</p>
+            <p className="text-xs mt-1">Le nom du fichier (sans extension) doit correspondre à une référence produit Shopify</p>
+          </div>
+        )}
+      </div>
+
+      <Lightbox item={lightboxItem} onClose={() => setLightboxItem(null)} />
+      {mockupItem && (
+        <MockupModalFromImage item={mockupItem} onClose={() => setMockupItem(null)} />
+      )}
     </>
   )
 }
+
+export default function ImagesPage() {
+  return (
+    <ErrorBoundary>
+      <ImagesPageInner />
+    </ErrorBoundary>
+  )
+}

src/app/(dashboard)/mockup/page.tsx

@@ -0,0 +1,449 @@
+'use client'
+import { useState, useEffect, useRef } from 'react'
+import { Header } from '@/components/layout/Header'
+import { TemplateLibrary } from '@/components/mockup/TemplateLibrary'
+import type { MockupTemplate } from '@/types/mockup'
+
+type Tab = 'generate' | 'library'
+type Step = 'product' | 'image' | 'template'
+
+interface Product {
+  shopifyId: string
+  title: string
+  ref: string
+  images: string[]
+}
+
+function blobToBase64(blob: Blob): Promise<string> {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader()
+    reader.onload = () => resolve((reader.result as string).split(',')[1])
+    reader.onerror = reject
+    reader.readAsDataURL(blob)
+  })
+}
+
+export default function MockupPage() {
+  const [tab, setTab] = useState<Tab>('generate')
+  const [step, setStep] = useState<Step>('product')
+
+  // Step 1 — product
+  const [products, setProducts] = useState<Product[]>([])
+  const [search, setSearch] = useState('')
+  const [showDropdown, setShowDropdown] = useState(false)
+  const [selectedProduct, setSelectedProduct] = useState<Product | null>(null)
+  const [family, setFamily] = useState('')
+  const [placement, setPlacement] = useState('')
+  const [dimensions, setDimensions] = useState('')
+  const dropdownRef = useRef<HTMLDivElement>(null)
+
+  // Step 2 — image
+  const [selectedImageUrl, setSelectedImageUrl] = useState<string | null>(null)
+  const [cutoutB64, setCutoutB64] = useState<string | null>(null)
+  const [loadingImage, setLoadingImage] = useState(false)
+  const fileRef = useRef<HTMLInputElement>(null)
+
+  // Step 3 — template + generation
+  const [templates, setTemplates] = useState<MockupTemplate[]>([])
+  const [selectedTemplate, setSelectedTemplate] = useState<string | null>(null)
+  const [instruction, setInstruction] = useState('')
+  const [generating, setGenerating] = useState(false)
+  const [resultB64, setResultB64] = useState<string | null>(null)
+  const [uploading, setUploading] = useState(false)
+  const [uploadedUrl, setUploadedUrl] = useState<string | null>(null)
+  const [error, setError] = useState<string | null>(null)
+  const templateFileRef = useRef<HTMLInputElement>(null)
+  const [uploadingTemplate, setUploadingTemplate] = useState(false)
+
+  useEffect(() => {
+    fetch('/api/products/list')
+      .then(r => r.json())
+      .then(data => setProducts(data.products ?? []))
+    fetch('/api/mockup/templates')
+      .then(r => r.json())
+      .then(data => setTemplates(data as MockupTemplate[]))
+  }, [])
+
+  const filtered = search.length < 2 ? [] : products.filter(p =>
+    p.title.toLowerCase().includes(search.toLowerCase()) ||
+    p.ref.toLowerCase().includes(search.toLowerCase())
+  ).slice(0, 20)
+
+  const isCarrelage = family.toLowerCase().includes('carrelage')
+
+  const filteredTemplates = templates.filter(t => {
+    if (t.family !== family && t.family !== 'Tous') return false
+    if (isCarrelage && placement && t.placement && t.placement !== placement) return false
+    return true
+  })
+
+  const selectProduct = (p: Product) => {
+    setSelectedProduct(p)
+    setSearch('')
+    setShowDropdown(false)
+    setSelectedImageUrl(null)
+    setCutoutB64(null)
+    setResultB64(null)
+    setUploadedUrl(null)
+    setStep('image')
+    fetch(`/api/products/sheet-info?ref=${encodeURIComponent(p.ref)}`)
+      .then(r => r.ok ? r.json() : null)
+      .then(data => {
+        if (!data?.product) return
+        const { famille, longueur, largeur } = data.product
+        if (famille) setFamily(famille)
+        if (longueur && largeur) setDimensions(`${longueur}x${largeur}cm`)
+        else if (longueur) setDimensions(`${longueur}cm`)
+      })
+  }
+
+  const selectImage = async (url: string) => {
+    setSelectedImageUrl(url)
+    setCutoutB64(null)
+    setLoadingImage(true)
+    setError(null)
+    try {
+      const res = await fetch(`/api/images/proxy?url=${encodeURIComponent(url)}`)
+      if (!res.ok) throw new Error('Impossible de charger l\'image')
+      const blob = await res.blob()
+      const b64 = await blobToBase64(blob)
+      setCutoutB64(b64)
+    } catch {
+      setError('Impossible de charger cette image')
+      setSelectedImageUrl(null)
+    } finally {
+      setLoadingImage(false)
+    }
+  }
+
+  const handleFileUpload = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0]
+    if (!file) return
+    setSelectedImageUrl(null)
+    const reader = new FileReader()
+    reader.onload = ev => {
+      setCutoutB64((ev.target?.result as string).split(',')[1])
+      setStep('template')
+    }
+    reader.readAsDataURL(file)
+  }
+
+  const uploadTemplate = async (e: React.ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0]
+    if (!file) return
+    setUploadingTemplate(true)
+    const form = new FormData()
+    form.append('name', file.name.replace(/\.[^.]+$/, ''))
+    form.append('family', family || 'Tous')
+    form.append('description', '')
+    form.append('image', file)
+    const res = await fetch('/api/mockup/templates', { method: 'POST', body: form })
+    const tpl = await res.json() as MockupTemplate
+    setTemplates(prev => [...prev, tpl])
+    setSelectedTemplate(tpl.id)
+    setUploadingTemplate(false)
+  }
+
+  const generate = async () => {
+    if (!selectedTemplate || !cutoutB64) return
+    setGenerating(true)
+    setError(null)
+    setResultB64(null)
+    setUploadedUrl(null)
+    try {
+      const res = await fetch('/api/mockup/generate', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          templateId: selectedTemplate,
+          productImageBase64: cutoutB64,
+          productName: selectedProduct!.title,
+          family: family || 'Tous',
+          placement: placement || undefined,
+          dimensions: dimensions || undefined,
+          instruction: instruction || undefined,
+        }),
+      })
+      const data = await res.json()
+      if (!res.ok) throw new Error(data.error)
+      setResultB64(data.imageBase64)
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Erreur')
+    } finally {
+      setGenerating(false)
+    }
+  }
+
+  const upload = async () => {
+    if (!resultB64 || !selectedProduct) return
+    setUploading(true)
+    try {
+      const res = await fetch('/api/images/upload', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          shopifyProductId: selectedProduct.shopifyId,
+          imageBase64: resultB64,
+          filename: `${selectedProduct.ref}-mockup.jpg`,
+        }),
+      })
+      const data = await res.json()
+      if (!res.ok) throw new Error(data.error)
+      setUploadedUrl(data.url)
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Erreur upload')
+    } finally {
+      setUploading(false)
+    }
+  }
+
+  const StepIndicator = () => (
+    <div className="flex items-center gap-2 mb-6">
+      {(['product', 'image', 'template'] as Step[]).map((s, i) => {
+        const labels = ['Produit', 'Image', 'Template']
+        const active = step === s
+        const done = (step === 'image' && s === 'product') ||
+                     (step === 'template' && (s === 'product' || s === 'image'))
+        return (
+          <div key={s} className="flex items-center gap-2">
+            {i > 0 && <div className={`h-px w-6 ${done ? 'bg-indigo-500' : 'bg-slate-600'}`} />}
+            <button
+              type="button"
+              onClick={() => done || active ? setStep(s) : undefined}
+              className={`flex items-center gap-1.5 text-xs font-medium transition-colors ${
+                active ? 'text-white' : done ? 'text-indigo-400 hover:text-indigo-300' : 'text-slate-500'
+              }`}
+            >
+              <span className={`w-5 h-5 rounded-full flex items-center justify-center text-xs ${
+                active ? 'bg-indigo-600 text-white' : done ? 'bg-indigo-500/30 text-indigo-400' : 'bg-slate-700 text-slate-500'
+              }`}>
+                {done ? '✓' : i + 1}
+              </span>
+              {labels[i]}
+            </button>
+          </div>
+        )
+      })}
+    </div>
+  )
+
+  return (
+    <>
+      <Header title="🖼️ Mockups" actions={
+        <div className="flex gap-2">
+          {(['generate', 'library'] as Tab[]).map(t => (
+            <button key={t} type="button" onClick={() => setTab(t)}
+              className={`px-3 py-1 text-xs rounded-lg transition-colors ${tab === t ? 'bg-indigo-600 text-white' : 'text-gray-400 hover:text-white'}`}>
+              {t === 'generate' ? 'Générer' : 'Bibliothèque templates'}
+            </button>
+          ))}
+        </div>
+      } />
+
+      <div className="p-6 max-w-2xl mx-auto">
+        {tab === 'library' ? (
+          <TemplateLibrary />
+        ) : (
+          <div>
+            <StepIndicator />
+
+            {/* ── STEP 1 : Produit ── */}
+            {step === 'product' && (
+              <div className="bg-slate-800 rounded-xl p-5 border border-slate-700 space-y-4">
+                <h2 className="text-sm font-semibold text-white">Rechercher un produit</h2>
+                <div className="relative" ref={dropdownRef}>
+                  <input
+                    type="text"
+                    value={search}
+                    onChange={e => { setSearch(e.target.value); setShowDropdown(true) }}
+                    onFocus={() => setShowDropdown(true)}
+                    placeholder="Nom ou référence du produit…"
+                    autoFocus
+                    className="w-full bg-slate-700 border border-slate-600 rounded-lg px-3 py-2 text-sm text-white focus:outline-none focus:ring-2 focus:ring-indigo-500"
+                  />
+                  {showDropdown && filtered.length > 0 && (
+                    <div className="absolute z-10 mt-1 w-full bg-slate-700 border border-slate-600 rounded-lg shadow-xl max-h-72 overflow-y-auto">
+                      {filtered.map(p => (
+                        <button key={p.shopifyId} type="button"
+                          onMouseDown={() => selectProduct(p)}
+                          className="w-full text-left px-3 py-2.5 text-sm text-white hover:bg-slate-600 flex justify-between gap-2 border-b border-slate-600/50 last:border-0">
+                          <span className="truncate">{p.title}</span>
+                          <span className="text-xs text-gray-400 shrink-0 self-center">{p.ref}</span>
+                        </button>
+                      ))}
+                    </div>
+                  )}
+                  {showDropdown && search.length >= 2 && filtered.length === 0 && (
+                    <div className="absolute z-10 mt-1 w-full bg-slate-700 border border-slate-600 rounded-lg px-3 py-2">
+                      <p className="text-xs text-gray-400">Aucun résultat</p>
+                    </div>
+                  )}
+                </div>
+              </div>
+            )}
+
+            {/* ── STEP 2 : Image ── */}
+            {step === 'image' && selectedProduct && (
+              <div className="bg-slate-800 rounded-xl p-5 border border-slate-700 space-y-4">
+                <div className="flex items-center justify-between">
+                  <div>
+                    <h2 className="text-sm font-semibold text-white">Choisir une image</h2>
+                    <p className="text-xs text-gray-400 mt-0.5">{selectedProduct.title} · <span className="font-mono text-indigo-300">{selectedProduct.ref}</span></p>
+                  </div>
+                  <button type="button" onClick={() => { setSelectedProduct(null); setStep('product') }}
+                    className="text-xs text-gray-400 hover:text-white">← Changer</button>
+                </div>
+
+                {selectedProduct.images.length > 0 ? (
+                  <div>
+                    <p className="text-xs text-gray-400 mb-2">Images Shopify</p>
+                    <div className="grid grid-cols-4 gap-2">
+                      {selectedProduct.images.map((url, i) => (
+                        <button key={i} type="button" onClick={() => { selectImage(url); setStep('template') }}
+                          className={`relative rounded-lg overflow-hidden border-2 transition-all ${selectedImageUrl === url ? 'border-indigo-500' : 'border-slate-600 hover:border-slate-400'}`}>
+                          <img src={url} alt={`Image ${i + 1}`} className="w-full h-20 object-cover" />
+                          {loadingImage && selectedImageUrl === url && (
+                            <div className="absolute inset-0 bg-black/50 flex items-center justify-center">
+                              <span className="text-xs text-white">…</span>
+                            </div>
+                          )}
+                        </button>
+                      ))}
+                    </div>
+                  </div>
+                ) : (
+                  <p className="text-xs text-gray-500">Aucune image disponible sur Shopify pour ce produit.</p>
+                )}
+
+                <div className="border-t border-slate-700 pt-3">
+                  <p className="text-xs text-gray-400 mb-2">Ou uploader une image (PNG découpée)</p>
+                  <input ref={fileRef} type="file" accept="image/*" onChange={handleFileUpload} className="text-xs text-gray-300" />
+                </div>
+
+                {error && <p className="text-xs text-red-400">{error}</p>}
+              </div>
+            )}
+
+            {/* ── STEP 3 : Template + génération ── */}
+            {step === 'template' && selectedProduct && cutoutB64 && (
+              <div className="space-y-4">
+                {/* Recap produit + image */}
+                <div className="bg-slate-800 rounded-xl p-4 border border-slate-700 flex items-center gap-3">
+                  {selectedImageUrl && (
+                    <img src={selectedImageUrl} alt="" className="w-12 h-12 object-cover rounded-lg border border-slate-600 shrink-0" />
+                  )}
+                  <div className="flex-1 min-w-0">
+                    <p className="text-sm text-white truncate">{selectedProduct.title}</p>
+                    <p className="text-xs text-gray-400">{selectedProduct.ref}
+                      {dimensions && <span className="ml-2 text-green-400">· {dimensions}</span>}
+                    </p>
+                  </div>
+                  <button type="button" onClick={() => setStep('image')} className="text-xs text-gray-400 hover:text-white shrink-0">← Image</button>
+                </div>
+
+                {/* Famille + placement carrelage */}
+                <div className="bg-slate-800 rounded-xl p-4 border border-slate-700 space-y-3">
+                  <div className="grid grid-cols-2 gap-3">
+                    <div>
+                      <label className="block text-xs text-gray-400 mb-1">Famille</label>
+                      <select value={family} onChange={e => { setFamily(e.target.value); setPlacement('') }}
+                        className="w-full bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-sm text-white focus:outline-none focus:ring-1 focus:ring-indigo-500">
+                        {['Menuiserie', 'Baies vitrées', 'Carrelage', 'Tous'].map(f => <option key={f}>{f}</option>)}
+                      </select>
+                    </div>
+                    <div>
+                      <label className="block text-xs text-gray-400 mb-1">Dimensions</label>
+                      <input value={dimensions} onChange={e => setDimensions(e.target.value)}
+                        placeholder="ex: 60x60cm"
+                        className="w-full bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-sm text-white focus:outline-none focus:ring-1 focus:ring-indigo-500" />
+                    </div>
+                  </div>
+                  {isCarrelage && (
+                    <div>
+                      <p className="text-xs text-gray-400 mb-1.5">Placement</p>
+                      <div className="flex gap-2">
+                        {[{ val: 'sol', label: 'Sol' }, { val: 'mur', label: 'Mur (faïence)' }].map(({ val, label }) => (
+                          <button key={val} type="button" onClick={() => setPlacement(p => p === val ? '' : val)}
+                            className={`px-3 py-1.5 rounded text-xs font-medium transition-colors ${placement === val ? 'bg-indigo-600 text-white' : 'bg-slate-700 text-gray-300 hover:bg-slate-600'}`}>
+                            {label}
+                          </button>
+                        ))}
+                      </div>
+                    </div>
+                  )}
+                </div>
+
+                {/* Templates */}
+                <div className="bg-slate-800 rounded-xl p-4 border border-slate-700 space-y-3">
+                  <div className="flex items-center justify-between">
+                    <h3 className="text-xs font-semibold text-gray-300 uppercase tracking-wide">Template</h3>
+                    <button type="button" onClick={() => templateFileRef.current?.click()}
+                      disabled={uploadingTemplate}
+                      className="text-xs text-indigo-400 hover:text-indigo-300 disabled:opacity-40">
+                      {uploadingTemplate ? 'Upload…' : '+ Nouveau template'}
+                    </button>
+                    <input ref={templateFileRef} type="file" accept="image/*" className="hidden" onChange={uploadTemplate} />
+                  </div>
+                  {filteredTemplates.length === 0 ? (
+                    <p className="text-xs text-gray-500">Aucun template pour cette famille. Uploadez-en un.</p>
+                  ) : (
+                    <div className="grid grid-cols-4 gap-2">
+                      {filteredTemplates.map(t => (
+                        <button key={t.id} type="button" onClick={() => setSelectedTemplate(t.id)}
+                          className={`relative rounded-lg overflow-hidden border-2 transition-all ${selectedTemplate === t.id ? 'border-indigo-500' : 'border-slate-600 hover:border-slate-400'}`}>
+                          <img src={`/api/mockup/templates/image/${t.filename}`} alt={t.name} className="w-full h-16 object-cover" />
+                          <div className="absolute bottom-0 left-0 right-0 bg-black/60 px-1 py-0.5">
+                            <p className="text-xs text-white truncate">{t.name}</p>
+                          </div>
+                        </button>
+                      ))}
+                    </div>
+                  )}
+                </div>
+
+                {/* Instruction + génération */}
+                <div className="space-y-2">
+                  <input type="text" value={instruction} onChange={e => setInstruction(e.target.value)}
+                    placeholder="Instruction personnalisée (optionnel)…"
+                    className="w-full bg-slate-800 border border-slate-700 rounded-lg px-3 py-2 text-sm text-white focus:outline-none focus:ring-1 focus:ring-indigo-500" />
+                  <button type="button" onClick={generate}
+                    disabled={!selectedTemplate || generating}
+                    className="w-full py-2.5 rounded-lg bg-indigo-600 text-white text-sm font-medium disabled:opacity-40 hover:bg-indigo-500 transition-colors">
+                    {generating ? 'Génération en cours…' : 'Générer le mockup'}
+                  </button>
+                </div>
+
+                {error && <p className="text-xs text-red-400">{error}</p>}
+
+                {/* Résultat */}
+                {resultB64 && (
+                  <div className="space-y-3">
+                    <img src={`data:image/jpeg;base64,${resultB64}`} alt="Mockup"
+                      className="w-full rounded-xl border border-slate-600" />
+                    <div className="flex gap-2">
+                      <input type="text" value={instruction} onChange={e => setInstruction(e.target.value)}
+                        placeholder="Modifier et regénérer…"
+                        className="flex-1 bg-slate-800 border border-slate-700 rounded px-2 py-1.5 text-xs text-white focus:outline-none focus:ring-1 focus:ring-indigo-500" />
+                      <button type="button" onClick={generate} disabled={generating}
+                        className="px-3 py-1.5 rounded bg-slate-700 text-xs text-white hover:bg-slate-600 disabled:opacity-40">
+                        {generating ? '…' : '↺'}
+                      </button>
+                    </div>
+                    {uploadedUrl ? (
+                      <p className="text-xs text-green-400 text-center">✓ Uploadé sur Shopify</p>
+                    ) : (
+                      <button type="button" onClick={upload} disabled={uploading}
+                        className="w-full py-2 rounded-lg bg-emerald-600 text-white text-sm font-medium disabled:opacity-40 hover:bg-emerald-500 transition-colors">
+                        {uploading ? 'Upload…' : '↑ Uploader sur Shopify'}
+                      </button>
+                    )}
+                  </div>
+                )}
+              </div>
+            )}
+          </div>
+        )}
+      </div>
+    </>
+  )
+}

src/app/(dashboard)/page.tsx

@@ -1,9 +1,291 @@
+'use client'
+import { useEffect, useState, useCallback } from 'react'
+import Link from 'next/link'
 import { Header } from '@/components/layout/Header'
+
+interface ProductStats {
+  active: number
+  draft: number
+  total: number
+  withoutImages: number
+}
+
+interface LastSync {
+  createdAt: string
+  userName: string
+  status: string
+  created: number
+  updated: number
+  deactivated: number
+  errors: number
+}
+
+interface DashboardStats {
+  products: ProductStats
+  lastSync: LastSync | null
+  sheetDrift: boolean
+  sheetModifiedAt: string | null
+}
+
+function StatCard({
+  icon,
+  label,
+  value,
+  sub,
+  href,
+  loading,
+  error,
+  accent,
+}: {
+  icon: string
+  label: string
+  value: string | number | null
+  sub?: string
+  href?: string
+  loading?: boolean
+  error?: boolean
+  accent?: 'indigo' | 'amber' | 'green' | 'red'
+}) {
+  const accentClass = {
+    indigo: 'border-indigo-500/30 bg-indigo-500/5',
+    amber:  'border-amber-500/30 bg-amber-500/5',
+    green:  'border-green-500/30 bg-green-500/5',
+    red:    'border-red-500/30 bg-red-500/5',
+  }[accent ?? 'indigo']
+
+  const content = (
+    <div className={`rounded-xl border p-5 flex flex-col gap-1 ${accentClass} ${href ? 'hover:brightness-110 transition-all cursor-pointer' : ''}`}>
+      <span className="text-xl">{icon}</span>
+      <p className="text-xs text-slate-400 mt-1">{label}</p>
+      {loading ? (
+        <p className="text-2xl font-bold text-slate-600 animate-pulse">—</p>
+      ) : error ? (
+        <p className="text-sm text-red-400">Erreur</p>
+      ) : (
+        <p className="text-2xl font-bold text-white">{value ?? '—'}</p>
+      )}
+      {sub && <p className="text-xs text-slate-500">{sub}</p>}
+    </div>
+  )
+
+  return href ? <Link href={href}>{content}</Link> : content
+}
+
+function ActionCard({ href, icon, label, description }: { href: string; icon: string; label: string; description: string }) {
+  return (
+    <Link
+      href={href}
+      className="flex items-start gap-3 bg-slate-800 hover:bg-slate-700 border border-slate-700 rounded-xl p-4 transition-colors group"
+    >
+      <span className="text-2xl mt-0.5">{icon}</span>
+      <div>
+        <p className="text-sm font-semibold text-white group-hover:text-indigo-300 transition-colors">{label}</p>
+        <p className="text-xs text-slate-400 mt-0.5">{description}</p>
+      </div>
+    </Link>
+  )
+}
+
+function formatDate(iso: string) {
+  return new Intl.DateTimeFormat('fr-FR', {
+    day: '2-digit', month: 'short', year: 'numeric',
+    hour: '2-digit', minute: '2-digit',
+  }).format(new Date(iso))
+}
+
 export default function DashboardPage() {
+  const [stats, setStats] = useState<DashboardStats | null>(null)
+  const [statsError, setStatsError] = useState(false)
+  const [statsLoading, setStatsLoading] = useState(true)
+
+  const [pendingCount, setPendingCount] = useState<number | null>(null)
+  const [pendingLoading, setPendingLoading] = useState(false)
+  const [pendingError, setPendingError] = useState(false)
+
+  useEffect(() => {
+    fetch('/api/dashboard/stats')
+      .then((r) => r.json())
+      .then((data) => {
+        if (data.error) throw new Error(data.error)
+        setStats(data)
+      })
+      .catch(() => setStatsError(true))
+      .finally(() => setStatsLoading(false))
+  }, [])
+
+  const loadPending = useCallback(async () => {
+    setPendingLoading(true)
+    setPendingError(false)
+    try {
+      const r = await fetch('/api/dashboard/pending')
+      const data = await r.json()
+      if (data.error) throw new Error(data.error)
+      setPendingCount(data.count)
+    } catch {
+      setPendingError(true)
+    } finally {
+      setPendingLoading(false)
+    }
+  }, [])
+
+  const lastSync = stats?.lastSync
+
   return (
     <>
       <Header title="📊 Dashboard" />
-      <div className="p-6"><p className="text-gray-400 text-sm">Dashboard — à implémenter (Plan 4)</p></div>
+
+      <div className="p-6 flex flex-col gap-8 flex-1 overflow-y-auto">
+
+        {/* ── Alerte drift Sheets ───────────────────────────────── */}
+        {!statsLoading && stats?.sheetDrift && (
+          <Link href="/sync" className="flex items-center gap-3 bg-amber-950/40 border border-amber-600/50 rounded-xl px-4 py-3 hover:bg-amber-950/60 transition-colors group">
+            <span className="text-xl">⚠️</span>
+            <div className="flex-1 min-w-0">
+              <p className="text-sm font-semibold text-amber-300">Google Sheets modifié depuis la dernière sync</p>
+              <p className="text-xs text-amber-500 mt-0.5">
+                {stats.sheetModifiedAt
+                  ? `Dernière modification : ${formatDate(stats.sheetModifiedAt)}`
+                  : 'Des changements sont peut-être en attente de synchronisation'}
+              </p>
+            </div>
+            <span className="text-xs text-amber-400 group-hover:text-amber-300 whitespace-nowrap">Lancer la sync →</span>
+          </Link>
+        )}
+
+        {/* ── KPIs ─────────────────────────────────────────────── */}
+        <section>
+          <h2 className="text-xs font-semibold text-slate-500 uppercase tracking-wider mb-3">Vue d&apos;ensemble</h2>
+          <div className="grid grid-cols-2 lg:grid-cols-4 gap-3">
+            <StatCard
+              icon="📦"
+              label="Produits actifs"
+              value={stats?.products.active ?? null}
+              sub={stats ? `${stats.products.draft} en brouillon` : undefined}
+              loading={statsLoading}
+              error={statsError}
+              accent="green"
+              href="/produits"
+            />
+            <StatCard
+              icon="🖼️"
+              label="Sans image"
+              value={stats?.products.withoutImages ?? null}
+              sub={stats ? `sur ${stats.products.total} produits` : undefined}
+              loading={statsLoading}
+              error={statsError}
+              accent={stats && stats.products.withoutImages > 0 ? 'amber' : 'green'}
+              href="/images"
+            />
+            <StatCard
+              icon="🔄"
+              label="Dernière sync"
+              value={lastSync ? formatDate(lastSync.createdAt) : 'Aucune'}
+              sub={lastSync ? `par ${lastSync.userName}` : undefined}
+              loading={statsLoading}
+              error={statsError}
+              accent="indigo"
+              href="/sync"
+            />
+
+            {/* Pending — chargement lazy */}
+            <div
+              className="rounded-xl border border-indigo-500/30 bg-indigo-500/5 p-5 flex flex-col gap-1 cursor-pointer hover:brightness-110 transition-all"
+              onClick={pendingCount === null && !pendingLoading ? loadPending : undefined}
+            >
+              <span className="text-xl">✨</span>
+              <p className="text-xs text-slate-400 mt-1">En attente de création</p>
+              {pendingLoading ? (
+                <p className="text-2xl font-bold text-slate-600 animate-pulse">—</p>
+              ) : pendingError ? (
+                <p className="text-sm text-red-400">Erreur — réessayer</p>
+              ) : pendingCount !== null ? (
+                <p className="text-2xl font-bold text-white">{pendingCount}</p>
+              ) : (
+                <button className="text-xs text-indigo-400 hover:text-indigo-300 text-left mt-1">
+                  Calculer →
+                </button>
+              )}
+              {pendingCount !== null && (
+                <p className="text-xs text-slate-500">depuis Google Sheets</p>
+              )}
+            </div>
+          </div>
+        </section>
+
+        {/* ── Dernière sync détail ──────────────────────────────── */}
+        {!statsLoading && lastSync && (
+          <section>
+            <h2 className="text-xs font-semibold text-slate-500 uppercase tracking-wider mb-3">Dernière synchronisation</h2>
+            <div className="bg-slate-800 border border-slate-700 rounded-xl p-5 flex flex-col gap-3">
+              <div className="flex items-center justify-between">
+                <div>
+                  <p className="text-sm font-semibold text-white">{formatDate(lastSync.createdAt)}</p>
+                  <p className="text-xs text-slate-400">par {lastSync.userName}</p>
+                </div>
+                <span className={`text-xs font-medium px-2 py-1 rounded-full border ${
+                  lastSync.status === 'success'
+                    ? 'bg-green-900/30 border-green-700 text-green-400'
+                    : 'bg-red-900/30 border-red-700 text-red-400'
+                }`}>
+                  {lastSync.status === 'success' ? '✅ Succès' : '❌ Erreur'}
+                </span>
+              </div>
+
+              <div className="grid grid-cols-4 gap-3 pt-2 border-t border-slate-700">
+                {[
+                  { label: 'Créations', value: lastSync.created,     color: 'text-green-400' },
+                  { label: 'Mises à jour', value: lastSync.updated,  color: 'text-blue-400'  },
+                  { label: 'Désactivés', value: lastSync.deactivated, color: 'text-amber-400' },
+                  { label: 'Erreurs', value: lastSync.errors,        color: 'text-red-400'   },
+                ].map(({ label, value, color }) => (
+                  <div key={label} className="text-center">
+                    <p className={`text-xl font-bold ${color}`}>{value}</p>
+                    <p className="text-xs text-slate-500">{label}</p>
+                  </div>
+                ))}
+              </div>
+
+              <div className="flex justify-end">
+                <Link href="/sync" className="text-xs text-indigo-400 hover:text-indigo-300 transition-colors">
+                  Nouvelle sync →
+                </Link>
+              </div>
+            </div>
+          </section>
+        )}
+
+        {/* ── Actions rapides ───────────────────────────────────── */}
+        <section>
+          <h2 className="text-xs font-semibold text-slate-500 uppercase tracking-wider mb-3">Actions rapides</h2>
+          <div className="grid grid-cols-1 sm:grid-cols-2 gap-3">
+            <ActionCard
+              href="/images"
+              icon="🖼️"
+              label="Uploader des images"
+              description="Convertir HEIC, détourer et envoyer sur Shopify"
+            />
+            <ActionCard
+              href="/sync"
+              icon="🔄"
+              label="Synchroniser le catalogue"
+              description="Comparer Google Sheets avec Shopify et appliquer les changements"
+            />
+            <ActionCard
+              href="/creation"
+              icon="✨"
+              label="Créer des produits"
+              description="Ajouter les produits en attente depuis Google Sheets"
+            />
+            <ActionCard
+              href="/produits"
+              icon="📦"
+              label="Voir le catalogue"
+              description="Parcourir et filtrer tous les produits Shopify"
+            />
+          </div>
+        </section>
+
+      </div>
     </>
   )
 }

src/app/(dashboard)/parametres/page.tsx

@@ -1,9 +1,47 @@
+'use client'
+import { useState } from 'react'
+import { useSession } from 'next-auth/react'
 import { Header } from '@/components/layout/Header'
+import { UsersManager } from '@/components/settings/UsersManager'
+import { ConnectionStatus } from '@/components/settings/ConnectionStatus'
+import { TemplateLibrary } from '@/components/mockup/TemplateLibrary'
+
+type Tab = 'connexions' | 'utilisateurs' | 'mockup-templates'
+
 export default function ParametresPage() {
+  const { data: session } = useSession()
+  const isAdmin = session?.user?.role === 'admin'
+  const [tab, setTab] = useState<Tab>('connexions')
+
+  const tabs: { id: Tab; label: string; adminOnly?: boolean }[] = [
+    { id: 'connexions', label: 'Connexions' },
+    { id: 'mockup-templates', label: 'Templates mockup' },
+    { id: 'utilisateurs', label: 'Utilisateurs', adminOnly: true },
+  ]
+
   return (
     <>
-      <Header title="⚙️ Paramètres" />
+      <Header title="Paramètres" />
-      <div className="p-6"><p className="text-gray-400 text-sm">Module Paramètres — à implémenter (Plan 4)</p></div>
+      <div className="p-6 space-y-6">
+        <div className="flex gap-2">
+          {tabs.filter(t => !t.adminOnly || isAdmin).map(t => (
+            <button
+              key={t.id}
+              onClick={() => setTab(t.id)}
+              className={`px-4 py-2 rounded-lg text-sm font-medium transition-colors ${
+                tab === t.id
+                  ? 'bg-indigo-600 text-white'
+                  : 'bg-slate-700 text-gray-300 hover:bg-slate-600'
+              }`}
+            >
+              {t.label}
+            </button>
+          ))}
+        </div>
+        {tab === 'connexions' && <ConnectionStatus />}
+        {tab === 'mockup-templates' && <TemplateLibrary />}
+        {isAdmin && tab === 'utilisateurs' && <UsersManager />}
+      </div>
     </>
   )
 }

src/app/(dashboard)/produits/doublons/page.tsx

@@ -0,0 +1,261 @@
+'use client'
+import { useEffect, useState, useCallback } from 'react'
+import Link from 'next/link'
+import { Header } from '@/components/layout/Header'
+import type { DuplicateGroup } from '@/app/api/products/duplicates/route'
+
+type DeleteState = 'idle' | 'confirm' | 'deleting' | 'done'
+
+interface GroupState {
+  group: DuplicateGroup
+  keepId: string
+  deleteState: DeleteState
+  deleted: string[]  // IDs supprimés
+  error: string | null
+}
+
+export default function DoublonsPage() {
+  const [loading, setLoading] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+  const [groupStates, setGroupStates] = useState<GroupState[]>([])
+
+  useEffect(() => {
+    fetch('/api/products/duplicates')
+      .then((r) => r.json())
+      .then((data) => {
+        if (data.error) throw new Error(data.error)
+        setGroupStates(
+          (data.groups as DuplicateGroup[]).map((group) => ({
+            group,
+            keepId: group.products[0].shopifyId, // garder le plus ancien par défaut
+            deleteState: 'idle',
+            deleted: [],
+            error: null,
+          }))
+        )
+      })
+      .catch((e: Error) => setError(e.message))
+      .finally(() => setLoading(false))
+  }, [])
+
+  const setKeep = useCallback((groupIdx: number, id: string) => {
+    setGroupStates((prev) =>
+      prev.map((gs, i) => i === groupIdx ? { ...gs, keepId: id } : gs)
+    )
+  }, [])
+
+  const askConfirm = useCallback((groupIdx: number) => {
+    setGroupStates((prev) =>
+      prev.map((gs, i) => i === groupIdx ? { ...gs, deleteState: 'confirm', error: null } : gs)
+    )
+  }, [])
+
+  const cancelConfirm = useCallback((groupIdx: number) => {
+    setGroupStates((prev) =>
+      prev.map((gs, i) => i === groupIdx ? { ...gs, deleteState: 'idle' } : gs)
+    )
+  }, [])
+
+  const deleteGroup = useCallback(async (groupIdx: number) => {
+    const gs = groupStates[groupIdx]
+    const toDelete = gs.group.products
+      .map((p) => p.shopifyId)
+      .filter((id) => id !== gs.keepId && !gs.deleted.includes(id))
+
+    setGroupStates((prev) =>
+      prev.map((s, i) => i === groupIdx ? { ...s, deleteState: 'deleting', error: null } : s)
+    )
+
+    const newDeleted = [...gs.deleted]
+    let lastError: string | null = null
+
+    for (const id of toDelete) {
+      const res = await fetch(`/api/products/${id}`, { method: 'DELETE' })
+      if (res.ok) {
+        newDeleted.push(id)
+      } else {
+        const data = await res.json()
+        lastError = data.error ?? `Erreur HTTP ${res.status}`
+        break
+      }
+    }
+
+    setGroupStates((prev) =>
+      prev.map((s, i) =>
+        i === groupIdx
+          ? { ...s, deleted: newDeleted, deleteState: lastError ? 'idle' : 'done', error: lastError }
+          : s
+      )
+    )
+  }, [groupStates])
+
+  const remaining = groupStates.filter((gs) => gs.deleteState !== 'done').length
+
+  return (
+    <>
+      <Header
+        title="🔍 Doublons produits"
+        actions={
+          <Link href="/produits" className="text-xs text-slate-400 hover:text-slate-200">
+            ← Retour au catalogue
+          </Link>
+        }
+      />
+
+      <div className="p-6 flex flex-col gap-6 flex-1 overflow-y-auto">
+
+        {loading && (
+          <div className="flex items-center gap-2 text-slate-400 text-sm py-12 justify-center">
+            <span className="animate-spin">⏳</span> Analyse du catalogue Shopify…
+          </div>
+        )}
+
+        {error && (
+          <div className="p-4 bg-red-900/30 border border-red-700 rounded-lg text-red-300 text-sm">
+            {error}
+          </div>
+        )}
+
+        {!loading && !error && groupStates.length === 0 && (
+          <div className="text-center py-16">
+            <p className="text-4xl mb-3">✅</p>
+            <p className="text-white font-semibold">Aucun doublon détecté</p>
+            <p className="text-slate-400 text-sm mt-1">Tous les produits ont une référence unique.</p>
+          </div>
+        )}
+
+        {!loading && groupStates.length > 0 && (
+          <>
+            <div className="flex items-center justify-between">
+              <p className="text-sm text-slate-400">
+                <span className="text-white font-semibold">{groupStates.length}</span> groupe{groupStates.length > 1 ? 's' : ''} de doublons détectés
+                {remaining < groupStates.length && (
+                  <span className="ml-2 text-green-400">· {groupStates.length - remaining} résolu{groupStates.length - remaining > 1 ? 's' : ''}</span>
+                )}
+              </p>
+            </div>
+
+            <div className="flex flex-col gap-4">
+              {groupStates.map((gs, groupIdx) => {
+                const { group, keepId, deleteState, deleted, error: groupError } = gs
+                const isDone = deleteState === 'done'
+                const activeProducts = group.products.filter((p) => !deleted.includes(p.shopifyId))
+
+                return (
+                  <div
+                    key={group.ref}
+                    className={`border rounded-xl overflow-hidden transition-all ${
+                      isDone
+                        ? 'border-green-700/50 bg-green-950/20 opacity-60'
+                        : 'border-slate-700 bg-slate-800/50'
+                    }`}
+                  >
+                    {/* En-tête groupe */}
+                    <div className="px-4 py-3 border-b border-slate-700 flex items-center justify-between">
+                      <div>
+                        <span className="font-mono text-sm text-indigo-300 font-semibold">{group.ref}</span>
+                        <span className="ml-3 text-xs text-slate-500">
+                          {isDone ? '✅ Résolu' : `${activeProducts.length} produits`}
+                        </span>
+                      </div>
+                      {!isDone && deleteState === 'idle' && (
+                        <button
+                          onClick={() => askConfirm(groupIdx)}
+                          className="text-xs px-3 py-1.5 bg-red-900/40 hover:bg-red-800/60 border border-red-700/50 text-red-300 rounded-lg transition-colors"
+                        >
+                          Supprimer les doublons
+                        </button>
+                      )}
+                    </div>
+
+                    {/* Liste des produits */}
+                    {!isDone && (
+                      <div className="divide-y divide-slate-700/50">
+                        {activeProducts.map((product) => {
+                          const isKeep = product.shopifyId === keepId
+                          return (
+                            <div
+                              key={product.shopifyId}
+                              className={`px-4 py-3 flex items-center gap-3 ${isKeep ? 'bg-green-950/20' : ''}`}
+                            >
+                              <input
+                                type="radio"
+                                name={`keep-${groupIdx}`}
+                                checked={isKeep}
+                                onChange={() => setKeep(groupIdx, product.shopifyId)}
+                                className="accent-green-500 cursor-pointer"
+                              />
+                              <div className="flex-1 min-w-0">
+                                <p className="text-sm text-white truncate">{product.title}</p>
+                                <p className="text-xs text-slate-500 mt-0.5">
+                                  ID {product.shopifyId} ·{' '}
+                                  <span className={product.status === 'active' ? 'text-green-400' : 'text-slate-400'}>
+                                    {product.status}
+                                  </span>
+                                </p>
+                              </div>
+                              <div className="flex items-center gap-2 shrink-0">
+                                {isKeep && (
+                                  <span className="text-xs text-green-400 font-medium">À garder</span>
+                                )}
+                                <a
+                                  href={product.shopifyUrl}
+                                  target="_blank"
+                                  rel="noreferrer"
+                                  className="text-xs text-slate-500 hover:text-slate-300"
+                                >
+                                  Shopify ↗
+                                </a>
+                              </div>
+                            </div>
+                          )
+                        })}
+                      </div>
+                    )}
+
+                    {/* Zone de confirmation */}
+                    {deleteState === 'confirm' && (
+                      <div className="px-4 py-3 bg-red-950/30 border-t border-red-800/40 flex items-center justify-between gap-4">
+                        <p className="text-sm text-red-300">
+                          Supprimer définitivement{' '}
+                          <strong>{activeProducts.length - 1} produit{activeProducts.length - 1 > 1 ? 's' : ''}</strong>{' '}
+                          de Shopify. Cette action est irréversible.
+                        </p>
+                        <div className="flex gap-2 shrink-0">
+                          <button
+                            onClick={() => cancelConfirm(groupIdx)}
+                            className="text-xs px-3 py-1.5 bg-slate-700 hover:bg-slate-600 text-slate-300 rounded-lg"
+                          >
+                            Annuler
+                          </button>
+                          <button
+                            onClick={() => deleteGroup(groupIdx)}
+                            className="text-xs px-3 py-1.5 bg-red-700 hover:bg-red-600 text-white font-semibold rounded-lg"
+                          >
+                            Confirmer la suppression
+                          </button>
+                        </div>
+                      </div>
+                    )}
+
+                    {deleteState === 'deleting' && (
+                      <div className="px-4 py-3 border-t border-slate-700 text-sm text-slate-400 flex items-center gap-2">
+                        <span className="animate-spin">⏳</span> Suppression en cours…
+                      </div>
+                    )}
+
+                    {groupError && (
+                      <div className="px-4 py-2 border-t border-red-800/40 text-xs text-red-400">
+                        Erreur : {groupError}
+                      </div>
+                    )}
+                  </div>
+                )
+              })}
+            </div>
+          </>
+        )}
+      </div>
+    </>
+  )
+}

src/app/(dashboard)/produits/page.tsx

@@ -1,9 +1,64 @@
+'use client'
+import { useState, useEffect, useMemo } from 'react'
+import Link from 'next/link'
 import { Header } from '@/components/layout/Header'
+import { ProductFiltersBar } from '@/components/products/ProductFiltersBar'
+import { ProductTable } from '@/components/products/ProductTable'
+import type { CatalogProduct, ProductFilters } from '@/types/products'
+
 export default function ProduitsPage() {
+  const [allProducts, setAllProducts] = useState<CatalogProduct[]>([])
+  const [loading, setLoading] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+  const [filters, setFilters] = useState<ProductFilters>({ status: 'all', search: '' })
+
+  useEffect(() => {
+    setLoading(true)
+    setError(null)
+    const params = filters.status !== 'all' ? `?status=${filters.status}` : ''
+    fetch(`/api/products/list${params}`)
+      .then((r) => r.json())
+      .then((data) => {
+        if (data.error) throw new Error(data.error)
+        setAllProducts(data.products)
+      })
+      .catch((e: Error) => setError(e.message))
+      .finally(() => setLoading(false))
+  }, [filters.status])
+
+  const displayed = useMemo(() => {
+    if (!filters.search.trim()) return allProducts
+    const q = filters.search.toLowerCase()
+    return allProducts.filter(
+      (p) => p.title.toLowerCase().includes(q) || p.ref.toLowerCase().includes(q),
+    )
+  }, [allProducts, filters.search])
+
   return (
     <>
-      <Header title="📦 Produits" />
+      <Header
-      <div className="p-6"><p className="text-gray-400 text-sm">Module Produits — à implémenter (Plan 4)</p></div>
+        title="Produits"
+        actions={
+          <Link href="/produits/doublons" className="text-xs px-3 py-1.5 bg-slate-700 hover:bg-slate-600 border border-slate-600 text-slate-300 rounded-lg transition-colors">
+            🔍 Vérifier les doublons
+          </Link>
+        }
+      />
+      <div className="p-6">
+        <div className="bg-slate-800 rounded-xl p-6">
+          <ProductFiltersBar
+            filters={filters}
+            total={displayed.length}
+            onChange={(f) => setFilters((prev) => ({ ...prev, ...f }))}
+          />
+          {error && (
+            <div className="mb-4 p-3 bg-red-900/30 border border-red-700 rounded-lg text-red-300 text-sm">
+              {error}
+            </div>
+          )}
+          <ProductTable products={displayed} loading={loading} />
+        </div>
+      </div>
     </>
   )
 }

src/app/(dashboard)/sync/page.tsx

@@ -1,9 +1,244 @@
+'use client'
+import { useState, useCallback } from 'react'
 import { Header } from '@/components/layout/Header'
+import { SyncStepper } from '@/components/sync/SyncStepper'
+import { DiffTable } from '@/components/sync/DiffTable'
+import { SyncProgress } from '@/components/sync/SyncProgress'
+import { SyncHistory } from '@/components/sync/SyncHistory'
+import { FamilySelector } from '@/components/common/FamilySelector'
+import type { DiffResult, SyncChange, SyncHistoryEntry } from '@/types/sync'
+
+type Step = 0 | 1 | 2 | 3 | 4
+
 export default function SyncPage() {
+  const [step, setStep] = useState<Step>(0)
+  const [selectedTab, setSelectedTab] = useState<string | null>(null)
+  const [loading, setLoading] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+  const [diff, setDiff] = useState<DiffResult | null>(null)
+  const [history, setHistory] = useState<SyncHistoryEntry[]>([])
+  const [historyLoaded, setHistoryLoaded] = useState(false)
+
+  // Log streaming state
+  const [log, setLog] = useState<string[]>([])
+  const [progress, setProgress] = useState<{ current: number; total: number } | null>(null)
+  const [summary, setSummary] = useState<{
+    created: number; updated: number; deactivated: number; errors: number; status: string
+  } | null>(null)
+
+  // Étape 0 → 1 : sélection famille
+  const handleSelectTab = useCallback((tab: string) => {
+    setSelectedTab(tab)
+    setStep(1)
+  }, [])
+
+  // Étape 1 → 2 : lancer le preview
+  const handleAnalyze = useCallback(async () => {
+    setLoading(true)
+    setError(null)
+    try {
+      const url = selectedTab ? `/api/sync/preview?tab=${encodeURIComponent(selectedTab)}` : '/api/sync/preview'
+      const res = await fetch(url)
+      const data = await res.json()
+      if (!res.ok) throw new Error(data.error || `HTTP ${res.status}`)
+      setDiff(data)
+      setStep(2)
+    } catch (err) {
+      setError((err as Error).message)
+    } finally {
+      setLoading(false)
+    }
+  }, [selectedTab])
+
+  // Étape 3 → 4 : lancer la sync en streaming
+  const handleExecute = useCallback(async () => {
+    if (!diff) return
+    setStep(4)
+    setLog([])
+    setProgress(null)
+    setSummary(null)
+
+    const actionableChanges: SyncChange[] = diff.changes.filter((c) => c.type !== 'unchanged')
+
+    try {
+      const res = await fetch('/api/sync/execute', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ changes: actionableChanges }),
+      })
+
+      if (!res.ok) {
+        const data = await res.json()
+        throw new Error(data.error || `HTTP ${res.status}`)
+      }
+
+      const reader = res.body!.getReader()
+      const decoder = new TextDecoder()
+      let buffer = ''
+
+      while (true) {
+        const { done, value } = await reader.read()
+        if (done) break
+        buffer += decoder.decode(value, { stream: true })
+        const lines = buffer.split('\n')
+        buffer = lines.pop() ?? ''
+
+        for (const line of lines.filter(Boolean)) {
+          try {
+            const event = JSON.parse(line)
+            if (event.type === 'progress') {
+              setProgress({ current: event.current, total: event.total })
+              setLog((prev) => [...prev, event.message])
+            } else if (event.type === 'done') {
+              setSummary(event.summary)
+              setHistoryLoaded(false) // force reload history
+            }
+          } catch { /* ligne incomplète */ }
+        }
+      }
+    } catch (err) {
+      setLog((prev) => [...prev, `❌ Erreur : ${(err as Error).message}`])
+    }
+  }, [diff])
+
+  // Charger l'historique au besoin
+  const loadHistory = useCallback(async () => {
+    if (historyLoaded) return
+    try {
+      const res = await fetch('/api/sync/history')
+      if (res.ok) {
+        setHistory(await res.json())
+        setHistoryLoaded(true)
+      }
+    } catch { /* silencieux */ }
+  }, [historyLoaded])
+
+  const actionableCount = diff
+    ? diff.summary.create + diff.summary.update + diff.summary.deactivate
+    : 0
+
   return (
     <>
       <Header title="🔄 Sync Sheets" />
-      <div className="p-6"><p className="text-gray-400 text-sm">Module Sync — à implémenter (Plan 3)</p></div>
+
+      <div className="p-6 flex flex-col gap-6 flex-1 overflow-y-auto">
+        {/* Stepper */}
+        <SyncStepper currentStep={step > 0 ? step : 1} />
+
+        {/* Étape 0 — Sélection famille */}
+        {step === 0 && (
+          <div className="bg-slate-800/50 border border-slate-700 rounded-xl p-6">
+            <h2 className="text-sm font-semibold text-white mb-4">Choisir une famille</h2>
+            <FamilySelector onSelect={handleSelectTab} />
+          </div>
+        )}
+
+        {/* Étape 1 — Analyser */}
+        {step === 1 && (
+          <div className="flex flex-col items-center gap-4 py-8">
+            <div className="flex items-center gap-2 bg-indigo-950/50 border border-indigo-800/50 rounded-lg px-4 py-2">
+              <span className="text-indigo-400 text-sm">📂 Famille :</span>
+              <span className="text-white text-sm font-semibold">{selectedTab}</span>
+              <button onClick={() => { setStep(0); setSelectedTab(null) }} className="ml-2 text-xs text-slate-400 hover:text-slate-200">changer</button>
+            </div>
+            <p className="text-slate-400 text-sm text-center max-w-md">
+              Compare la famille <strong className="text-white">{selectedTab}</strong> avec le catalogue Shopify.
+            </p>
+            {error && (
+              <div className="bg-red-950 border border-red-800 text-red-300 text-sm rounded-lg px-4 py-2 max-w-md">
+                {error}
+              </div>
+            )}
+            <button
+              onClick={handleAnalyze}
+              disabled={loading}
+              className="bg-indigo-600 hover:bg-indigo-500 disabled:opacity-50 text-white font-semibold px-6 py-3 rounded-xl text-sm transition-colors"
+            >
+              {loading ? '⏳ Analyse en cours…' : '🔍 Analyser le Sheets'}
+            </button>
+          </div>
+        )}
+
+        {/* Étape 2 — Aperçu diff */}
+        {step === 2 && diff && (
+          <div className="flex flex-col gap-4">
+            <DiffTable diff={diff} />
+            <div className="flex gap-3 justify-end">
+              <button
+                onClick={() => { setStep(1); setDiff(null) }}
+                className="px-4 py-2 text-sm bg-slate-800 hover:bg-slate-700 text-slate-300 rounded-lg"
+              >
+                ← Relancer l&apos;analyse
+              </button>
+              <button
+                onClick={() => setStep(3)}
+                disabled={actionableCount === 0}
+                className="px-4 py-2 text-sm bg-indigo-600 hover:bg-indigo-500 disabled:opacity-40 text-white font-semibold rounded-lg"
+              >
+                Confirmer →
+              </button>
+            </div>
+          </div>
+        )}
+
+        {/* Étape 3 — Confirmation */}
+        {step === 3 && diff && (
+          <div className="flex flex-col items-center gap-6 py-8">
+            <div className="bg-slate-900 border border-slate-700 rounded-xl p-6 text-center max-w-sm">
+              <p className="text-lg font-semibold text-white mb-2">
+                {actionableCount} changement{actionableCount > 1 ? 's' : ''} vont être appliqués à Shopify
+              </p>
+              <p className="text-sm text-slate-400">
+                {diff.summary.create > 0 && `${diff.summary.create} créations · `}
+                {diff.summary.update > 0 && `${diff.summary.update} mises à jour · `}
+                {diff.summary.deactivate > 0 && `${diff.summary.deactivate} désactivations`}
+              </p>
+            </div>
+            <div className="flex gap-3">
+              <button
+                onClick={() => setStep(2)}
+                className="px-4 py-2 text-sm bg-slate-800 hover:bg-slate-700 text-slate-300 rounded-lg"
+              >
+                Annuler
+              </button>
+              <button
+                onClick={handleExecute}
+                className="px-6 py-2 text-sm bg-indigo-600 hover:bg-indigo-500 text-white font-semibold rounded-lg"
+              >
+                ✅ Confirmer et synchroniser
+              </button>
+            </div>
+          </div>
+        )}
+
+        {/* Étape 4 — Progression */}
+        {step === 4 && (
+          <div className="flex flex-col gap-4">
+            <SyncProgress log={log} progress={progress} summary={summary} />
+            {summary && (
+              <div className="flex gap-3 justify-end">
+                <button
+                  onClick={() => { setStep(0); setSelectedTab(null); setDiff(null); setSummary(null); setLog([]) }}
+                  className="px-4 py-2 text-sm bg-indigo-600 hover:bg-indigo-500 text-white font-semibold rounded-lg"
+                >
+                  ↺ Nouvelle sync
+                </button>
+              </div>
+            )}
+          </div>
+        )}
+
+        {/* Historique */}
+        <div className="mt-4">
+          <button
+            onClick={loadHistory}
+            className="text-sm text-slate-500 hover:text-slate-300 mb-3"
+          >
+            {historyLoaded ? '📋 Historique des syncs' : '📋 Charger l\'historique'}
+          </button>
+          {historyLoaded && <SyncHistory entries={history} />}
+        </div>
+      </div>
     </>
   )
 }

src/app/api/admin/connections/test/route.ts

@@ -0,0 +1,45 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+
+async function testShopify(): Promise<{ ok: boolean; message: string }> {
+  const domain = process.env.SHOPIFY_STORE_DOMAIN
+  const token = process.env.SHOPIFY_ADMIN_API_TOKEN
+  if (!domain || !token) return { ok: false, message: 'Variables manquantes' }
+  try {
+    const res = await fetch(`https://${domain}/admin/api/2024-01/shop.json`, {
+      headers: { 'X-Shopify-Access-Token': token },
+    })
+    if (!res.ok) return { ok: false, message: `HTTP ${res.status}` }
+    const data = await res.json()
+    return { ok: true, message: `Boutique : ${data.shop?.name ?? domain}` }
+  } catch (e) {
+    return { ok: false, message: e instanceof Error ? e.message : 'Erreur réseau' }
+  }
+}
+
+async function testSheets(): Promise<{ ok: boolean; message: string }> {
+  const apiKey = process.env.GOOGLE_API_KEY
+  const sheetId = process.env.GOOGLE_SHEETS_ID
+  if (!apiKey || !sheetId) return { ok: false, message: 'Variables manquantes' }
+  try {
+    const url = `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}?key=${apiKey}&fields=properties.title`
+    const res = await fetch(url)
+    if (!res.ok) return { ok: false, message: `HTTP ${res.status}` }
+    const data = await res.json()
+    return { ok: true, message: `Feuille : ${data.properties?.title ?? sheetId}` }
+  } catch (e) {
+    return { ok: false, message: e instanceof Error ? e.message : 'Erreur réseau' }
+  }
+}
+
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+export async function GET(_req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session || session.user.role !== 'admin') {
+    return NextResponse.json({ error: 'Forbidden' }, { status: 403 })
+  }
+
+  const [shopify, sheets] = await Promise.all([testShopify(), testSheets()])
+  return NextResponse.json({ shopify, sheets })
+}

src/app/api/admin/update-compare-prices/route.ts

@@ -0,0 +1,58 @@
+import { NextResponse } from 'next/server'
+import { readSheetProducts } from '@/lib/googleSheets'
+import { fetchAllShopifyProducts, getConfig } from '@/lib/shopifySync'
+
+export const maxDuration = 300
+
+export async function POST() {
+  const sheetProducts = await readSheetProducts()
+  const shopifyProducts = await fetchAllShopifyProducts()
+  const shopifyByHandle = new Map(shopifyProducts.map(p => [p.handle, p]))
+  const { baseUrl, headers } = getConfig()
+
+  const norm = (v: string | null | undefined) => (!v || v === '0.00') ? null : v
+
+  let updated = 0, skipped = 0, errors = 0
+  const log: string[] = []
+
+  for (const sheet of sheetProducts) {
+    const shopify = shopifyByHandle.get(sheet.handle)
+    if (!shopify) { skipped++; continue }
+
+    const newCompareAt = sheet.compareAtPrice ?? null
+    const currentCompareAt = (shopify as { compareAtPrice?: string }).compareAtPrice ?? null
+
+    if (norm(newCompareAt) === norm(currentCompareAt) && sheet.price === shopify.price) {
+      skipped++; continue
+    }
+
+    const detailRes = await fetch(`${baseUrl}/products/${shopify.shopifyId}.json?fields=variants`, { headers })
+    if (!detailRes.ok) { errors++; log.push(`✗ ${sheet.ref} — lecture variant`); continue }
+    const detail = await detailRes.json() as { product: { variants: Array<{ id: number }> } }
+    const variantId = detail.product.variants[0]?.id
+    if (!variantId) { errors++; continue }
+
+    const res = await fetch(`${baseUrl}/products/${shopify.shopifyId}.json`, {
+      method: 'PUT',
+      headers,
+      body: JSON.stringify({
+        product: {
+          id: shopify.shopifyId,
+          variants: [{ id: variantId, price: sheet.price, compare_at_price: newCompareAt }],
+        },
+      }),
+    })
+
+    if (res.ok) {
+      updated++
+      log.push(`✓ ${sheet.ref} price=${sheet.price} compare_at=${newCompareAt ?? 'null'}`)
+    } else {
+      errors++
+      log.push(`✗ ${sheet.ref} — ${res.status}`)
+    }
+
+    await new Promise(r => setTimeout(r, 300))
+  }
+
+  return NextResponse.json({ updated, skipped, errors, log })
+}

src/app/api/admin/users/[id]/route.ts

@@ -0,0 +1,47 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { prisma } from '@/lib/prisma'
+import bcrypt from 'bcryptjs'
+
+async function requireAdmin() {
+  const session = await getServerSession(authOptions)
+  if (!session || session.user.role !== 'admin') return null
+  return session
+}
+
+export async function PUT(req: NextRequest, { params }: { params: { id: string } }) {
+  const session = await requireAdmin()
+  if (!session) return NextResponse.json({ error: 'Forbidden' }, { status: 403 })
+
+  const body = await req.json().catch(() => ({}))
+  const { name, role, password } = body as Record<string, string>
+
+  const data: Record<string, string> = {}
+  if (name) data.name = name
+  if (role) data.role = role
+  if (password) data.password = await bcrypt.hash(password, 12)
+
+  if (Object.keys(data).length === 0) {
+    return NextResponse.json({ error: 'Aucun champ à mettre à jour' }, { status: 400 })
+  }
+
+  const user = await prisma.user.update({
+    where: { id: params.id },
+    data,
+    select: { id: true, email: true, name: true, role: true, createdAt: true },
+  })
+  return NextResponse.json(user)
+}
+
+export async function DELETE(req: NextRequest, { params }: { params: { id: string } }) {
+  const session = await requireAdmin()
+  if (!session) return NextResponse.json({ error: 'Forbidden' }, { status: 403 })
+
+  if (params.id === session.user.id) {
+    return NextResponse.json({ error: 'Impossible de se supprimer soi-même' }, { status: 400 })
+  }
+
+  await prisma.user.delete({ where: { id: params.id } })
+  return NextResponse.json({ ok: true })
+}

src/app/api/admin/users/route.test.ts

@@ -0,0 +1,61 @@
+import { GET, POST } from './route'
+import { getServerSession } from 'next-auth'
+import { prisma } from '@/lib/prisma'
+import bcrypt from 'bcryptjs'
+
+jest.mock('next-auth')
+jest.mock('@/lib/prisma', () => ({ prisma: { user: { findMany: jest.fn(), create: jest.fn() } } }))
+jest.mock('bcryptjs')
+
+const mockSession = getServerSession as jest.MockedFunction<typeof getServerSession>
+const mockFindMany = prisma.user.findMany as jest.MockedFunction<typeof prisma.user.findMany>
+const mockCreate = prisma.user.create as jest.MockedFunction<typeof prisma.user.create>
+const mockHash = bcrypt.hash as jest.MockedFunction<typeof bcrypt.hash>
+
+const adminSession = { user: { id: 'admin-id', role: 'admin' } }
+const gestSession = { user: { id: 'gest-id', role: 'gestionnaire' } }
+
+describe('GET /api/admin/users', () => {
+  it('retourne 403 si non admin', async () => {
+    mockSession.mockResolvedValue(gestSession as never)
+    const res = await GET(new Request('http://localhost') as never)
+    expect(res.status).toBe(403)
+  })
+
+  it('retourne la liste des utilisateurs', async () => {
+    mockSession.mockResolvedValue(adminSession as never)
+    mockFindMany.mockResolvedValue([
+      { id: '1', email: 'a@b.com', name: 'Alice', role: 'admin', createdAt: new Date() } as never,
+    ])
+    const res = await GET(new Request('http://localhost') as never)
+    const body = await res.json()
+    expect(body).toHaveLength(1)
+    expect(body[0].email).toBe('a@b.com')
+    expect(body[0].password).toBeUndefined()
+  })
+})
+
+describe('POST /api/admin/users', () => {
+  it('retourne 403 si non admin', async () => {
+    mockSession.mockResolvedValue(gestSession as never)
+    const res = await POST(new Request('http://localhost', { method: 'POST', body: '{}' }) as never)
+    expect(res.status).toBe(403)
+  })
+
+  it('crée un utilisateur avec mot de passe hashé', async () => {
+    mockSession.mockResolvedValue(adminSession as never)
+    mockHash.mockResolvedValue('hashed' as never)
+    mockCreate.mockResolvedValue({ id: 'new', email: 'b@c.com', name: 'Bob', role: 'gestionnaire', createdAt: new Date() } as never)
+    const body = JSON.stringify({ email: 'b@c.com', name: 'Bob', password: 'pass123', role: 'gestionnaire' })
+    const res = await POST(new Request('http://localhost', { method: 'POST', body, headers: { 'Content-Type': 'application/json' } }) as never)
+    expect(res.status).toBe(201)
+    expect(mockHash).toHaveBeenCalledWith('pass123', 12)
+  })
+
+  it('retourne 400 si champs manquants', async () => {
+    mockSession.mockResolvedValue(adminSession as never)
+    const body = JSON.stringify({ email: 'b@c.com' })
+    const res = await POST(new Request('http://localhost', { method: 'POST', body, headers: { 'Content-Type': 'application/json' } }) as never)
+    expect(res.status).toBe(400)
+  })
+})

src/app/api/admin/users/route.ts

@@ -0,0 +1,42 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { prisma } from '@/lib/prisma'
+import bcrypt from 'bcryptjs'
+
+async function requireAdmin() {
+  const session = await getServerSession(authOptions)
+  if (!session || session.user.role !== 'admin') return null
+  return session
+}
+
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+export async function GET(_req: NextRequest) {
+  const session = await requireAdmin()
+  if (!session) return NextResponse.json({ error: 'Forbidden' }, { status: 403 })
+
+  const users = await prisma.user.findMany({
+    orderBy: { createdAt: 'asc' },
+    select: { id: true, email: true, name: true, role: true, createdAt: true },
+  })
+  return NextResponse.json(users)
+}
+
+export async function POST(req: NextRequest) {
+  const session = await requireAdmin()
+  if (!session) return NextResponse.json({ error: 'Forbidden' }, { status: 403 })
+
+  const body = await req.json().catch(() => ({}))
+  const { email, name, password, role } = body as Record<string, string>
+
+  if (!email || !name || !password || !role) {
+    return NextResponse.json({ error: 'email, name, password et role requis' }, { status: 400 })
+  }
+
+  const hashed = await bcrypt.hash(password, 12)
+  const user = await prisma.user.create({
+    data: { email, name, password: hashed, role },
+    select: { id: true, email: true, name: true, role: true, createdAt: true },
+  })
+  return NextResponse.json(user, { status: 201 })
+}

src/app/api/creation/clear-ids/route.ts

@@ -0,0 +1,93 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+
+async function getAccessToken(): Promise<string | null> {
+  const email = process.env.GOOGLE_SERVICE_ACCOUNT_EMAIL
+  const rawKey = process.env.GOOGLE_SERVICE_ACCOUNT_KEY
+  if (!email || !rawKey) return null
+
+  const privateKey = rawKey.replace(/\\n/g, '\n')
+  const now = Math.floor(Date.now() / 1000)
+  const header = Buffer.from(JSON.stringify({ alg: 'RS256', typ: 'JWT' })).toString('base64url')
+  const payload = Buffer.from(JSON.stringify({
+    iss: email,
+    scope: 'https://www.googleapis.com/auth/spreadsheets',
+    aud: 'https://oauth2.googleapis.com/token',
+    iat: now,
+    exp: now + 3600,
+  })).toString('base64url')
+
+  const { createSign } = await import('crypto')
+  const sign = createSign('RSA-SHA256')
+  sign.update(`${header}.${payload}`)
+  const signature = sign.sign(privateKey, 'base64url')
+  const jwt = `${header}.${payload}.${signature}`
+
+  const tokenRes = await fetch('https://oauth2.googleapis.com/token', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+    body: new URLSearchParams({ grant_type: 'urn:ietf:params:oauth:grant-type:jwt-bearer', assertion: jwt }),
+  })
+  if (!tokenRes.ok) return null
+  const { access_token } = await tokenRes.json() as { access_token: string }
+  return access_token
+}
+
+// POST /api/creation/clear-ids?tab=SOL CARRELAGE
+// Efface la colonne A (ID Shopify) de toutes les lignes produit d'un onglet
+export async function POST(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+
+  const tab = new URL(req.url).searchParams.get('tab')
+  if (!tab) return NextResponse.json({ error: 'tab requis' }, { status: 400 })
+
+  const apiKey = process.env.GOOGLE_API_KEY
+  const sheetId = process.env.GOOGLE_SHEETS_ID
+  if (!apiKey || !sheetId) return NextResponse.json({ error: 'Config Google manquante' }, { status: 500 })
+
+  // Lire les données de l'onglet
+  const range = encodeURIComponent(`${tab}!A1:A500`)
+  const res = await fetch(
+    `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}/values/${range}?key=${apiKey}`,
+  )
+  if (!res.ok) return NextResponse.json({ error: `Sheets read error: ${res.status}` }, { status: 502 })
+
+  const data = await res.json() as { values?: string[][] }
+  const rows = data.values ?? []
+
+  // Trouver la ligne d'en-tête (contient "ID" en col A)
+  const headerRowIdx = rows.findIndex(r => (r[0] ?? '').trim() === 'ID')
+  if (headerRowIdx === -1) return NextResponse.json({ error: 'Onglet non reconnu (pas de colonne ID)' }, { status: 400 })
+
+  // Identifier les lignes produit qui ont un ID Shopify (numérique)
+  const clearValues: string[][] = []
+  const startRow = headerRowIdx + 2 // 1-indexed, skip header row
+  for (let i = headerRowIdx + 1; i < rows.length; i++) {
+    const cell = (rows[i]?.[0] ?? '').trim()
+    clearValues.push([cell && /^\d+$/.test(cell) ? '' : cell])
+  }
+
+  if (clearValues.length === 0) return NextResponse.json({ cleared: 0 })
+
+  const accessToken = await getAccessToken()
+  if (!accessToken) return NextResponse.json({ error: 'Impossible d\'obtenir le token Google' }, { status: 500 })
+
+  const writeRange = `${tab}!A${startRow}:A${startRow + clearValues.length - 1}`
+  const writeRes = await fetch(
+    `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}/values/${encodeURIComponent(writeRange)}?valueInputOption=RAW`,
+    {
+      method: 'PUT',
+      headers: { Authorization: `Bearer ${accessToken}`, 'Content-Type': 'application/json' },
+      body: JSON.stringify({ range: writeRange, majorDimension: 'ROWS', values: clearValues }),
+    },
+  )
+  if (!writeRes.ok) {
+    const err = await writeRes.text()
+    return NextResponse.json({ error: `Sheets write error: ${err}` }, { status: 502 })
+  }
+
+  const cleared = clearValues.filter(r => r[0] === '').length
+  return NextResponse.json({ cleared, tab })
+}

src/app/api/creation/collections/route.ts

@@ -0,0 +1,32 @@
+import { NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+
+const API_VERSION = '2024-01'
+
+export async function GET() {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+
+  const domain = process.env.SHOPIFY_STORE_DOMAIN
+  const token = process.env.SHOPIFY_ADMIN_API_TOKEN
+  if (!domain || !token) return NextResponse.json({ error: 'Config Shopify manquante' }, { status: 500 })
+
+  const baseUrl = `https://${domain}/admin/api/${API_VERSION}`
+  const headers = { 'X-Shopify-Access-Token': token, 'Content-Type': 'application/json' }
+
+  // Récupère custom collections + smart collections
+  const [customRes, smartRes] = await Promise.all([
+    fetch(`${baseUrl}/custom_collections.json?limit=250&fields=id,title`, { headers }),
+    fetch(`${baseUrl}/smart_collections.json?limit=250&fields=id,title`, { headers }),
+  ])
+
+  const custom = customRes.ok ? (await customRes.json()).custom_collections as { id: number; title: string }[] : []
+  const smart = smartRes.ok ? (await smartRes.json()).smart_collections as { id: number; title: string }[] : []
+
+  const collections = [...custom, ...smart]
+    .map(c => ({ id: String(c.id), title: c.title }))
+    .sort((a, b) => a.title.localeCompare(b.title))
+
+  return NextResponse.json({ collections })
+}

src/app/api/creation/execute/route.ts

@@ -0,0 +1,126 @@
+import { NextRequest } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { fetchPendingProducts, writeShopifyIdToSheet } from '@/lib/creationSheets'
+import { generateDescriptions } from '@/lib/openaiClient'
+import { ensureMetafieldDefinition, setProductMetafield } from '@/lib/shopifyMetafields'
+import { addProductToCollection } from '@/lib/shopifyCollections'
+import { createShopifyProduct, fetchAllShopifyProducts } from '@/lib/shopifySync'
+import { prisma } from '@/lib/prisma'
+import type { MetafieldResolution, CreationStreamEvent } from '@/types/creation'
+
+function encode(event: CreationStreamEvent): string {
+  return JSON.stringify(event) + '\n'
+}
+
+export async function POST(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session) {
+    return new Response(JSON.stringify({ error: 'Non authentifié' }), { status: 401 })
+  }
+
+  const userId = (session.user as { id: string }).id
+  const body = await req.json().catch(() => ({})) as { resolutions?: MetafieldResolution[]; tab?: string; collectionOverride?: string }
+  const resolutions: MetafieldResolution[] = body.resolutions ?? []
+  const tabFilter: string | undefined = body.tab ?? undefined
+  const collectionOverride: string | undefined = body.collectionOverride ?? undefined
+  const resolutionMap = new Map<string, MetafieldResolution>(resolutions.map(r => [r.columnHeader, r]))
+
+  const stream = new ReadableStream({
+    async start(controller) {
+      const send = (event: CreationStreamEvent) => controller.enqueue(encode(event))
+      try {
+        const [existingRows, shopifyProducts] = await Promise.all([
+          prisma.productCreation.findMany({ select: { sheetTab: true, sheetRow: true } }),
+          fetchAllShopifyProducts(),
+        ])
+        const alreadyCreated = new Set(existingRows.map(e => `${e.sheetTab}:${e.sheetRow}`))
+        const shopifyRefs = new Set(shopifyProducts.map(p => p.ref.trim().toLowerCase()))
+        const pending = await fetchPendingProducts(alreadyCreated, tabFilter)
+        const total = pending.length
+
+        if (total === 0) {
+          send({ type: 'done', summary: { created: 0, skipped: 0, errors: 0, status: 'success' } })
+          controller.close()
+          return
+        }
+
+        // Crée les définitions manquantes en amont
+        for (const resolution of resolutions) {
+          if (resolution.action === 'create') await ensureMetafieldDefinition(resolution)
+        }
+
+        let created = 0
+        let skipped = 0
+        let errors = 0
+
+        for (let i = 0; i < pending.length; i++) {
+          const product = pending[i]
+
+          // Vérifier si le produit existe déjà dans Shopify par SKU
+          if (shopifyRefs.has(product.sku.trim().toLowerCase())) {
+            send({ type: 'skipped', title: product.title, sku: product.sku })
+            skipped++
+            continue
+          }
+
+          send({ type: 'progress', current: i + 1, total, tab: product.tab, title: product.title, step: 'Génération descriptions…' })
+          try {
+            const { longDesc } = await generateDescriptions({
+              title: product.title,
+              rawDescription: '',
+              comment: product.comment,
+              vendor: product.vendor,
+              famille: product.famille,
+            })
+            send({ type: 'progress', current: i + 1, total, tab: product.tab, title: product.title, step: 'Création produit Shopify…' })
+            console.log(`[creation] ${product.sku} stock=${product.stock}`)
+            const shopifyId = await createShopifyProduct({
+              ref: product.sku,
+              handle: product.sku.toLowerCase().replace(/[^a-z0-9]+/g, '-'),
+              title: product.title,
+              description: longDesc,
+              price: product.priceActual || '0.00',
+              stock: product.stock,
+              weightKg: product.weightKg,
+              status: 'active',
+            })
+            const effectiveCollectionId = product.collectionId || collectionOverride || ''
+            if (effectiveCollectionId) await addProductToCollection(shopifyId, effectiveCollectionId)
+            if (product.subCollectionId) await addProductToCollection(shopifyId, product.subCollectionId)
+            send({ type: 'progress', current: i + 1, total, tab: product.tab, title: product.title, step: 'Métachamps…' })
+            for (const [colHeader, value] of Object.entries(product.specificFields)) {
+              const resolution = resolutionMap.get(colHeader)
+              if (!resolution || resolution.action === 'skip') continue
+              await setProductMetafield(shopifyId, resolution, value)
+            }
+            await prisma.productCreation.create({
+              data: { userId, sheetTab: product.tab, sheetRow: product.rowNumber, shopifyId, sku: product.sku, title: product.title, status: 'success' },
+            })
+            await writeShopifyIdToSheet(product.tab, product.rowNumber, shopifyId)
+            created++
+          } catch (err) {
+            const message = err instanceof Error ? err.message : 'Erreur inconnue'
+            send({ type: 'error', title: product.title, message })
+            await prisma.productCreation.create({
+              data: { userId, sheetTab: product.tab, sheetRow: product.rowNumber, shopifyId: '', sku: product.sku, title: product.title, status: 'error', errorMessage: message },
+            })
+            errors++
+          }
+        }
+        const status = errors === 0 ? 'success' : created === 0 ? 'error' : 'partial'
+        send({ type: 'done', summary: { created, skipped, errors, status } })
+      } catch (err) {
+        const message = err instanceof Error ? err.message : 'Erreur inconnue'
+        send({ type: 'done', summary: { created: 0, skipped: 0, errors: 1, status: 'error' } })
+        console.error('[creation/execute]', message)
+      } finally {
+        controller.close()
+      }
+    },
+  })
+
+  return new Response(stream, {
+    headers: { 'Content-Type': 'application/x-ndjson', 'Transfer-Encoding': 'chunked' },
+  })
+}

src/app/api/creation/metafields/route.test.ts

@@ -0,0 +1,37 @@
+import { GET } from './route'
+import * as shopifyMetafields from '@/lib/shopifyMetafields'
+import { getServerSession } from 'next-auth'
+
+jest.mock('next-auth')
+jest.mock('@/lib/shopifyMetafields')
+
+const mockSession = getServerSession as jest.MockedFunction<typeof getServerSession>
+const mockFetchDefs = shopifyMetafields.fetchMetafieldDefinitions as jest.MockedFunction<typeof shopifyMetafields.fetchMetafieldDefinitions>
+const mockMatch = shopifyMetafields.matchMetafields as jest.MockedFunction<typeof shopifyMetafields.matchMetafields>
+
+describe('GET /api/creation/metafields', () => {
+  beforeEach(() => {
+    mockSession.mockResolvedValue({ user: { id: 'u1', role: 'admin' } } as never)
+    mockFetchDefs.mockResolvedValue([
+      { id: '1', namespace: 'custom', key: 'puissance', name: 'Puissance', type: 'single_line_text_field' },
+    ])
+    mockMatch.mockReturnValue({
+      matched: { 'Puissance (AN)': { columnHeader: 'Puissance (AN)', action: 'map', namespace: 'custom', key: 'puissance', existingDefinitionId: '1' } },
+      unmatched: ['Batterie (AP)'],
+    })
+  })
+
+  it('retourne 401 sans session', async () => {
+    mockSession.mockResolvedValue(null)
+    const res = await GET(new Request('http://localhost/api/creation/metafields?columns=Puissance') as never)
+    expect(res.status).toBe(401)
+  })
+
+  it('retourne définitions + matching', async () => {
+    const res = await GET(new Request('http://localhost/api/creation/metafields?columns=Puissance+%28AN%29%2CBatterie+%28AP%29') as never)
+    const body = await res.json()
+    expect(body.definitions).toHaveLength(1)
+    expect(body.matched['Puissance (AN)'].key).toBe('puissance')
+    expect(body.unmatched).toContain('Batterie (AP)')
+  })
+})

src/app/api/creation/metafields/route.ts

@@ -0,0 +1,20 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { fetchMetafieldDefinitions, matchMetafields } from '@/lib/shopifyMetafields'
+
+export async function GET(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+  try {
+    const { searchParams } = new URL(req.url)
+    const columnsParam = searchParams.get('columns') ?? ''
+    const columns = columnsParam ? columnsParam.split(',').map(c => c.trim()).filter(Boolean) : []
+    const definitions = await fetchMetafieldDefinitions()
+    const { matched, unmatched } = matchMetafields(columns, definitions)
+    return NextResponse.json({ definitions, matched, unmatched })
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur inconnue'
+    return NextResponse.json({ error: message }, { status: 500 })
+  }
+}

src/app/api/creation/preview/route.test.ts

@@ -0,0 +1,50 @@
+import { GET } from './route'
+import * as creationSheets from '@/lib/creationSheets'
+import { getServerSession } from 'next-auth'
+
+jest.mock('next-auth')
+jest.mock('@/lib/creationSheets')
+jest.mock('@/lib/prisma', () => ({
+  prisma: { productCreation: { findMany: jest.fn().mockResolvedValue([]) } },
+}))
+
+const mockSession = getServerSession as jest.MockedFunction<typeof getServerSession>
+const mockFetch = creationSheets.fetchPendingProducts as jest.MockedFunction<typeof creationSheets.fetchPendingProducts>
+
+const makePending = (tab: string, row: number, specific: Record<string, string> = {}) => ({
+  tab, rowNumber: row, sku: `SKU-${row}`, title: `Produit ${row}`,
+  priceMarket: '99', priceActual: '79', stock: 5, weightKg: 2,
+  vendor: 'BOSCH', famille: tab, sousFamille: '', comment: '',
+  collectionId: '10', subCollectionId: '', hasPhoto: false,
+  specificFields: specific,
+})
+
+describe('GET /api/creation/preview', () => {
+  beforeEach(() => {
+    mockSession.mockResolvedValue({ user: { id: 'u1', role: 'admin' } } as never)
+    mockFetch.mockResolvedValue([
+      makePending('OUTILLAGE', 2, { 'Puissance (AN)': '1500W' }),
+      makePending('CARRELAGE', 3),
+    ])
+  })
+
+  it('retourne 401 sans session', async () => {
+    mockSession.mockResolvedValue(null)
+    const res = await GET(new Request('http://localhost') as never)
+    expect(res.status).toBe(401)
+  })
+
+  it('retourne les produits groupés par onglet', async () => {
+    const res = await GET(new Request('http://localhost') as never)
+    const body = await res.json()
+    expect(body.byTab['OUTILLAGE']).toHaveLength(1)
+    expect(body.byTab['CARRELAGE']).toHaveLength(1)
+    expect(body.total).toBe(2)
+  })
+
+  it('liste les colonnes spécifiques uniques', async () => {
+    const res = await GET(new Request('http://localhost') as never)
+    const body = await res.json()
+    expect(body.specificColumns).toContain('Puissance (AN)')
+  })
+})

src/app/api/creation/preview/route.ts

@@ -0,0 +1,28 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { fetchPendingProducts } from '@/lib/creationSheets'
+import { prisma } from '@/lib/prisma'
+import type { PendingProduct } from '@/types/creation'
+
+export async function GET(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+  const tab = new URL(req.url).searchParams.get('tab') ?? undefined
+  try {
+    const existing = await prisma.productCreation.findMany({ select: { sheetTab: true, sheetRow: true } })
+    const alreadyCreated = new Set(existing.map(e => `${e.sheetTab}:${e.sheetRow}`))
+    const pending = await fetchPendingProducts(alreadyCreated, tab)
+    const byTab: Record<string, PendingProduct[]> = {}
+    const specificColumns = new Set<string>()
+    for (const p of pending) {
+      if (!byTab[p.tab]) byTab[p.tab] = []
+      byTab[p.tab].push(p)
+      Object.keys(p.specificFields).forEach(k => specificColumns.add(k))
+    }
+    return NextResponse.json({ byTab, total: pending.length, specificColumns: Array.from(specificColumns).sort() })
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur inconnue'
+    return NextResponse.json({ error: message }, { status: 500 })
+  }
+}

src/app/api/creation/resolutions/route.ts

@@ -0,0 +1,20 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { loadResolutionCache, saveResolutionCache } from '@/lib/resolutionCache'
+import type { MetafieldResolution } from '@/types/creation'
+
+export async function GET() {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+  const cache = await loadResolutionCache()
+  return NextResponse.json(cache)
+}
+
+export async function PUT(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+  const body = await req.json() as Record<string, MetafieldResolution>
+  await saveResolutionCache(body)
+  return NextResponse.json({ ok: true })
+}

src/app/api/creation/sync-stock-reverse/route.ts

@@ -0,0 +1,181 @@
+import { NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { findColIndex, writeShopifyIdToSheet } from '@/lib/creationSheets'
+import { getConfig } from '@/lib/shopifySync'
+
+void writeShopifyIdToSheet // réutilise le même mécanisme d'auth Google
+
+export async function POST() {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+
+  const stream = new ReadableStream({
+    async start(controller) {
+      const send = (obj: object) => controller.enqueue(new TextEncoder().encode(JSON.stringify(obj) + '\n'))
+      const sleep = (ms: number) => new Promise(r => setTimeout(r, ms))
+
+      const shopifyFetch = async (url: string, opts: RequestInit = {}, retries = 3): Promise<Response> => {
+        const res = await fetch(url, opts)
+        if (res.status === 429 && retries > 0) {
+          const retryAfter = parseInt(res.headers.get('Retry-After') ?? '2', 10)
+          await sleep(retryAfter * 1000)
+          return shopifyFetch(url, opts, retries - 1)
+        }
+        return res
+      }
+
+      try {
+        const { baseUrl, headers: shopifyHeaders } = getConfig()
+
+        // Récupérer le location_id
+        const locRes = await shopifyFetch(`${baseUrl}/locations.json`, { headers: shopifyHeaders })
+        if (!locRes.ok) throw new Error(`Shopify locations error: ${locRes.status}`)
+        const locData = await locRes.json() as { locations: Array<{ id: number }> }
+        const locationId = locData.locations[0]?.id
+        if (!locationId) throw new Error('Aucune location Shopify trouvée')
+
+        // Auth Google Sheets
+        const sheetId = process.env.GOOGLE_SHEETS_ID
+        const email = process.env.GOOGLE_SERVICE_ACCOUNT_EMAIL
+        const rawKey = process.env.GOOGLE_SERVICE_ACCOUNT_KEY
+        if (!sheetId || !email || !rawKey) throw new Error('Credentials Google manquants')
+        const apiKey = process.env.GOOGLE_API_KEY
+        if (!apiKey) throw new Error('GOOGLE_API_KEY manquant')
+
+        const privateKey = rawKey.replace(/\\n/g, '\n')
+        const now = Math.floor(Date.now() / 1000)
+        const header = Buffer.from(JSON.stringify({ alg: 'RS256', typ: 'JWT' })).toString('base64url')
+        const payload = Buffer.from(JSON.stringify({
+          iss: email,
+          scope: 'https://www.googleapis.com/auth/spreadsheets',
+          aud: 'https://oauth2.googleapis.com/token',
+          iat: now, exp: now + 3600,
+        })).toString('base64url')
+        const { createSign } = await import('crypto')
+        const sign = createSign('RSA-SHA256')
+        sign.update(`${header}.${payload}`)
+        const signature = sign.sign(privateKey, 'base64url')
+        const jwt = `${header}.${payload}.${signature}`
+        const tokenRes = await fetch('https://oauth2.googleapis.com/token', {
+          method: 'POST', headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+          body: new URLSearchParams({ grant_type: 'urn:ietf:params:oauth:grant-type:jwt-bearer', assertion: jwt }),
+        })
+        if (!tokenRes.ok) throw new Error(`Google token error: ${tokenRes.status}`)
+        const { access_token } = await tokenRes.json() as { access_token: string }
+
+        // Lire tous les onglets
+        const metaRes = await fetch(
+          `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}?key=${apiKey}&fields=sheets.properties.title`,
+        )
+        if (!metaRes.ok) throw new Error(`Sheets metadata error: ${metaRes.status}`)
+        const meta = await metaRes.json()
+        const tabs = (meta.sheets as Array<{ properties: { title: string } }>).map(s => s.properties.title)
+
+        type Entry = { shopifyId: string; tab: string; row: number; stockColLetter: string }
+        const entries: Entry[] = []
+
+        for (const tab of tabs) {
+          const range = encodeURIComponent(`${tab}!A1:BZ`)
+          const res = await fetch(`https://sheets.googleapis.com/v4/spreadsheets/${sheetId}/values/${range}?key=${apiKey}`)
+          if (!res.ok) continue
+          const data = await res.json()
+          const rows = (data.values ?? []) as string[][]
+          if (rows.length < 2) continue
+          const headerRowIdx = rows.findIndex(r => (r[0] ?? '').trim() === 'ID')
+          if (headerRowIdx === -1) continue
+          const hdrs = rows[headerRowIdx]
+          if (findColIndex(hdrs, 'Publié') === -1) continue
+
+          const stockCdtIdx = findColIndex(hdrs, 'Stock conditionné')
+          const stockIdx = findColIndex(hdrs, 'Stock (en pièce)') !== -1
+            ? findColIndex(hdrs, 'Stock (en pièce)')
+            : findColIndex(hdrs, 'Stock (pièce)')
+
+          // Choisir la colonne cible (Stock conditionné en priorité)
+          const targetColIdx = stockCdtIdx !== -1 ? stockCdtIdx : stockIdx
+          if (targetColIdx === -1) continue
+
+          const colLetter = targetColIdx < 26
+            ? String.fromCharCode(65 + targetColIdx)
+            : String.fromCharCode(64 + Math.floor(targetColIdx / 26)) + String.fromCharCode(65 + (targetColIdx % 26))
+
+          const get = (row: string[], i: number) => (i >= 0 ? (row[i] ?? '').trim() : '')
+
+          for (let ri = 0; ri < rows.slice(headerRowIdx + 1).length; ri++) {
+            const row = rows[headerRowIdx + 1 + ri]
+            const shopifyId = get(row, 0)
+            if (!shopifyId || !/^\d+$/.test(shopifyId)) continue
+            entries.push({ shopifyId, tab, row: headerRowIdx + 2 + ri, stockColLetter: colLetter })
+          }
+        }
+
+        send({ type: 'total', total: entries.length })
+
+        let updated = 0
+        let errors = 0
+        const batchByTab: Record<string, Array<{ range: string; values: string[][] }>> = {}
+
+        for (let i = 0; i < entries.length; i++) {
+          const { shopifyId, tab, row, stockColLetter } = entries[i]
+          send({ type: 'progress', current: i + 1, total: entries.length })
+          try {
+            await sleep(300)
+            const pRes = await shopifyFetch(`${baseUrl}/products/${shopifyId}.json?fields=variants`, { headers: shopifyHeaders })
+            if (pRes.status === 404) continue
+            if (!pRes.ok) { errors++; continue }
+
+            const pData = await pRes.json() as { product: { variants: Array<{ inventory_item_id: number }> } }
+            const inventoryItemId = pData.product.variants[0]?.inventory_item_id
+            if (!inventoryItemId) { errors++; continue }
+
+            await sleep(300)
+            const invRes = await shopifyFetch(
+              `${baseUrl}/inventory_levels.json?inventory_item_ids=${inventoryItemId}&location_ids=${locationId}`,
+              { headers: shopifyHeaders }
+            )
+            if (!invRes.ok) { errors++; continue }
+
+            const invData = await invRes.json() as { inventory_levels: Array<{ available: number }> }
+            const available = invData.inventory_levels[0]?.available ?? 0
+
+            if (!batchByTab[tab]) batchByTab[tab] = []
+            batchByTab[tab].push({ range: `${tab}!${stockColLetter}${row}`, values: [[String(available)]] })
+            updated++
+          } catch {
+            errors++
+          }
+        }
+
+        // Écrire tous les stocks dans le Sheet en batch par tab
+        const allData = Object.values(batchByTab).flat()
+        if (allData.length > 0) {
+          const batchRes = await fetch(
+            `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}/values:batchUpdate`,
+            {
+              method: 'POST',
+              headers: { Authorization: `Bearer ${access_token}`, 'Content-Type': 'application/json' },
+              body: JSON.stringify({ valueInputOption: 'RAW', data: allData }),
+            }
+          )
+          if (!batchRes.ok) {
+            const txt = await batchRes.text()
+            throw new Error(`Sheets batchUpdate error: ${batchRes.status} — ${txt}`)
+          }
+        }
+
+        send({ type: 'done', updated, errors })
+      } catch (err) {
+        const message = err instanceof Error ? err.message : 'Erreur inconnue'
+        console.error('[sync-stock-reverse] fatal:', message)
+        send({ type: 'done', updated: 0, errors: 1, fatalError: message })
+      } finally {
+        controller.close()
+      }
+    },
+  })
+
+  return new Response(stream, {
+    headers: { 'Content-Type': 'application/x-ndjson', 'Transfer-Encoding': 'chunked' },
+  })
+}

src/app/api/creation/sync-stock/route.ts

@@ -0,0 +1,150 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { findColIndex } from '@/lib/creationSheets'
+import { getConfig } from '@/lib/shopifySync'
+
+export async function POST(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+
+  const { tab } = await req.json().catch(() => ({})) as { tab?: string }
+
+  const stream = new ReadableStream({
+    async start(controller) {
+      const send = (obj: object) => controller.enqueue(new TextEncoder().encode(JSON.stringify(obj) + '\n'))
+
+      try {
+        const { baseUrl, headers } = getConfig()
+
+        // Récupérer le location_id une seule fois
+        const locRes = await fetch(`${baseUrl}/locations.json`, { headers })
+        if (!locRes.ok) throw new Error(`Shopify locations error: ${locRes.status}`)
+        const locData = await locRes.json() as { locations: Array<{ id: number }> }
+        const locationId = locData.locations[0]?.id
+        if (!locationId) throw new Error('Aucune location Shopify trouvée')
+
+        // Lire tous les onglets avec un ID Shopify en colonne A
+        const apiKey = process.env.GOOGLE_API_KEY
+        const sheetId = process.env.GOOGLE_SHEETS_ID
+        if (!apiKey || !sheetId) throw new Error('GOOGLE_API_KEY et GOOGLE_SHEETS_ID requis')
+
+        let tabs: string[]
+        if (tab) {
+          tabs = [tab]
+        } else {
+          const metaRes = await fetch(
+            `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}?key=${apiKey}&fields=sheets.properties.title`,
+          )
+          if (!metaRes.ok) throw new Error(`Sheets metadata error: ${metaRes.status}`)
+          const meta = await metaRes.json()
+          tabs = (meta.sheets as Array<{ properties: { title: string } }>).map(s => s.properties.title)
+        }
+
+        type StockEntry = { shopifyId: string; stock: number; title: string; tab: string }
+        const entries: StockEntry[] = []
+
+        for (const t of tabs) {
+          const range = encodeURIComponent(`${t}!A1:BZ`)
+          const res = await fetch(`https://sheets.googleapis.com/v4/spreadsheets/${sheetId}/values/${range}?key=${apiKey}`)
+          if (!res.ok) continue
+          const data = await res.json()
+          const rows = (data.values ?? []) as string[][]
+          if (rows.length < 2) continue
+
+          const headerRowIdx = rows.findIndex(r => (r[0] ?? '').trim() === 'ID')
+          if (headerRowIdx === -1) continue
+          const hdrs = rows[headerRowIdx]
+          if (findColIndex(hdrs, 'Publié') === -1) continue
+
+          const idIdx = 0
+          const nomIdx = findColIndex(hdrs, 'Nom')
+          const stockIdx = findColIndex(hdrs, 'Stock (en pièce)') !== -1
+            ? findColIndex(hdrs, 'Stock (en pièce)')
+            : findColIndex(hdrs, 'Stock (pièce)')
+          const stockCdtIdx = findColIndex(hdrs, 'Stock conditionné')
+
+          const get = (row: string[], i: number) => (i >= 0 ? (row[i] ?? '').trim() : '')
+
+          for (const row of rows.slice(headerRowIdx + 1)) {
+            const shopifyId = get(row, idIdx)
+            if (!shopifyId || !/^\d+$/.test(shopifyId)) continue
+            const rawStock = get(row, stockCdtIdx) || get(row, stockIdx)
+            const stock = parseInt(rawStock || '0', 10) || 0
+            entries.push({ shopifyId, stock, title: get(row, nomIdx), tab: t })
+          }
+        }
+
+        send({ type: 'total', total: entries.length })
+
+        let updated = 0
+        let errors = 0
+
+        const sleep = (ms: number) => new Promise(r => setTimeout(r, ms))
+
+        const shopifyFetch = async (url: string, opts: RequestInit, retries = 3): Promise<Response> => {
+          const res = await fetch(url, opts)
+          if (res.status === 429 && retries > 0) {
+            const retryAfter = parseInt(res.headers.get('Retry-After') ?? '2', 10)
+            await sleep(retryAfter * 1000)
+            return shopifyFetch(url, opts, retries - 1)
+          }
+          return res
+        }
+
+        for (let i = 0; i < entries.length; i++) {
+          const { shopifyId, stock, title } = entries[i]
+          send({ type: 'progress', current: i + 1, total: entries.length, title })
+          try {
+            await sleep(300) // éviter le rate limiting (2 req/s max)
+
+            const pRes = await shopifyFetch(`${baseUrl}/products/${shopifyId}.json?fields=variants`, { headers })
+            if (pRes.status === 404) continue
+            if (!pRes.ok) {
+              send({ type: 'error', title, message: `Produit ${shopifyId} erreur (${pRes.status})` })
+              errors++
+              continue
+            }
+            const pData = await pRes.json() as { product: { variants: Array<{ inventory_item_id: number }> } }
+            const inventoryItemId = pData.product.variants[0]?.inventory_item_id
+            if (!inventoryItemId) { errors++; continue }
+
+            await sleep(300)
+            await shopifyFetch(`${baseUrl}/inventory_levels/connect.json`, {
+              method: 'POST', headers,
+              body: JSON.stringify({ location_id: locationId, inventory_item_id: inventoryItemId }),
+            })
+
+            await sleep(300)
+            const setRes = await shopifyFetch(`${baseUrl}/inventory_levels/set.json`, {
+              method: 'POST', headers,
+              body: JSON.stringify({ location_id: locationId, inventory_item_id: inventoryItemId, available: stock }),
+            })
+            if (!setRes.ok) {
+              const txt = await setRes.text()
+              send({ type: 'error', title, message: `stock set failed: ${setRes.status} — ${txt}` })
+              errors++
+            } else {
+              updated++
+            }
+          } catch (err) {
+            send({ type: 'error', title, message: err instanceof Error ? err.message : 'Erreur inconnue' })
+            errors++
+          }
+        }
+
+        send({ type: 'done', updated, errors })
+      } catch (err) {
+        const message = err instanceof Error ? err.message : 'Erreur inconnue'
+        console.error('[sync-stock] fatal:', message)
+        send({ type: 'done', updated: 0, errors: 1, fatalError: message })
+      } finally {
+        controller.close()
+      }
+    },
+  })
+
+  return new Response(stream, {
+    headers: { 'Content-Type': 'application/x-ndjson', 'Transfer-Encoding': 'chunked' },
+  })
+}

src/app/api/dashboard/pending/route.ts

@@ -0,0 +1,20 @@
+import { NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { fetchPendingProducts } from '@/lib/creationSheets'
+import { prisma } from '@/lib/prisma'
+
+export async function GET() {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+
+  try {
+    const existing = await prisma.productCreation.findMany({ select: { sheetTab: true, sheetRow: true } })
+    const alreadyCreated = new Set(existing.map((e) => `${e.sheetTab}:${e.sheetRow}`))
+    const pending = await fetchPendingProducts(alreadyCreated)
+    return NextResponse.json({ count: pending.length })
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur inconnue'
+    return NextResponse.json({ error: message }, { status: 500 })
+  }
+}

src/app/api/dashboard/stats/route.ts

@@ -0,0 +1,114 @@
+import { NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { prisma } from '@/lib/prisma'
+
+const API_VERSION = '2024-01'
+
+function getShopifyConfig() {
+  const domain = process.env.SHOPIFY_STORE_DOMAIN
+  const token = process.env.SHOPIFY_ADMIN_API_TOKEN
+  if (!domain || !token) throw new Error('SHOPIFY_STORE_DOMAIN et SHOPIFY_ADMIN_API_TOKEN requis')
+  return {
+    baseUrl: `https://${domain}/admin/api/${API_VERSION}`,
+    headers: { 'X-Shopify-Access-Token': token, 'Content-Type': 'application/json' },
+  }
+}
+
+function extractNextUrl(linkHeader: string | null): string | null {
+  if (!linkHeader) return null
+  const match = linkHeader.match(/<([^>]+)>;\s*rel="next"/)
+  return match ? match[1] : null
+}
+
+interface LightProduct {
+  id: number
+  status: string
+  images: Array<{ id: number }>
+}
+
+async function fetchProductsLight(status: 'active' | 'draft'): Promise<LightProduct[]> {
+  const { baseUrl, headers } = getShopifyConfig()
+  const all: LightProduct[] = []
+  let url: string | null =
+    `${baseUrl}/products.json?limit=250&fields=id,status,images&status=${status}`
+
+  while (url) {
+    const res = await fetch(url, { headers, cache: 'no-store' })
+    if (!res.ok) throw new Error(`Shopify fetch error (${status}): ${res.status}`)
+    const data = await res.json()
+    all.push(...(data.products as LightProduct[]))
+    url = extractNextUrl(res.headers.get('Link'))
+  }
+  return all
+}
+
+async function fetchSheetModifiedTime(): Promise<string | null> {
+  const apiKey = process.env.GOOGLE_API_KEY
+  const sheetId = process.env.GOOGLE_SHEETS_ID
+  if (!apiKey || !sheetId) return null
+  try {
+    const res = await fetch(
+      `https://www.googleapis.com/drive/v3/files/${sheetId}?fields=modifiedTime&key=${apiKey}`,
+      { cache: 'no-store' },
+    )
+    if (!res.ok) return null
+    const data = await res.json()
+    return (data.modifiedTime as string) ?? null
+  } catch {
+    return null
+  }
+}
+
+export async function GET() {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+
+  try {
+    const [activeProducts, draftProducts, lastSyncRun, sheetModifiedTime] = await Promise.all([
+      fetchProductsLight('active'),
+      fetchProductsLight('draft'),
+      prisma.syncRun.findFirst({
+        orderBy: { createdAt: 'desc' },
+        include: { user: { select: { name: true } } },
+      }),
+      fetchSheetModifiedTime(),
+    ])
+
+    const allProducts = [...activeProducts, ...draftProducts]
+    const withoutImages = allProducts.filter((p) => p.images.length === 0).length
+
+    const lastSync = lastSyncRun
+      ? {
+          createdAt: lastSyncRun.createdAt.toISOString(),
+          userName: lastSyncRun.user.name,
+          status: lastSyncRun.status,
+          created: lastSyncRun.created,
+          updated: lastSyncRun.updated,
+          deactivated: lastSyncRun.deactivated,
+          errors: lastSyncRun.errors,
+        }
+      : null
+
+    // Drift : Sheets modifié après la dernière sync réussie
+    const sheetDrift =
+      sheetModifiedTime !== null &&
+      lastSyncRun !== null &&
+      new Date(sheetModifiedTime) > lastSyncRun.createdAt
+
+    return NextResponse.json({
+      products: {
+        active: activeProducts.length,
+        draft: draftProducts.length,
+        total: allProducts.length,
+        withoutImages,
+      },
+      lastSync,
+      sheetDrift,
+      sheetModifiedAt: sheetModifiedTime,
+    })
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur inconnue'
+    return NextResponse.json({ error: message }, { status: 500 })
+  }
+}

src/app/api/images/convert-heic/route.ts

@@ -0,0 +1,35 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import convert from 'heic-convert'
+
+export async function POST(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+
+  try {
+    const formData = await req.formData()
+    const file = formData.get('file') as File | null
+    if (!file) return NextResponse.json({ error: 'Fichier manquant' }, { status: 400 })
+
+    const inputBuffer = Buffer.from(await file.arrayBuffer())
+    // heic-convert utilise libheif WASM — supporte HEIC/HEIF sur tous les environnements
+    const outputBuffer = await convert({
+      buffer: inputBuffer,
+      format: 'JPEG',
+      quality: 0.92,
+    })
+
+    const jpeg = Buffer.from(outputBuffer)
+    return new NextResponse(jpeg.buffer as ArrayBuffer, {
+      headers: {
+        'Content-Type': 'image/jpeg',
+        'Content-Length': String(jpeg.length),
+      },
+    })
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur conversion'
+    console.error('[convert-heic API]', message)
+    return NextResponse.json({ error: message }, { status: 500 })
+  }
+}

src/app/api/images/proxy/route.ts

@@ -0,0 +1,18 @@
+import { NextRequest } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+
+export async function GET(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session) return new Response('Non authentifié', { status: 401 })
+
+  const url = req.nextUrl.searchParams.get('url')
+  if (!url) return new Response('url requis', { status: 400 })
+
+  const res = await fetch(url)
+  if (!res.ok) return new Response('Fetch failed', { status: 502 })
+
+  const buffer = await res.arrayBuffer()
+  const contentType = res.headers.get('content-type') ?? 'image/jpeg'
+  return new Response(buffer, { headers: { 'Content-Type': contentType } })
+}

src/app/api/images/upload/route.ts

@@ -0,0 +1,32 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { uploadProductImage } from '@/lib/shopify'
+
+export async function POST(req: NextRequest) {
+  let body: Record<string, unknown>
+  try {
+    body = await req.json()
+  } catch {
+    return NextResponse.json({ error: 'Corps JSON invalide' }, { status: 400 })
+  }
+
+  const { shopifyProductId, imageBase64, filename } = body
+
+  if (!shopifyProductId || typeof shopifyProductId !== 'string') {
+    return NextResponse.json({ error: 'shopifyProductId requis' }, { status: 400 })
+  }
+  if (!imageBase64 || typeof imageBase64 !== 'string') {
+    return NextResponse.json({ error: 'imageBase64 requis' }, { status: 400 })
+  }
+  if (!filename || typeof filename !== 'string') {
+    return NextResponse.json({ error: 'filename requis' }, { status: 400 })
+  }
+
+  try {
+    const result = await uploadProductImage(shopifyProductId, imageBase64, filename)
+    return NextResponse.json(result)
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur inconnue'
+    const status = (err as { status?: number }).status === 404 ? 404 : 500
+    return NextResponse.json({ error: message }, { status })
+  }
+}

src/app/api/mockup/generate/route.ts

@@ -0,0 +1,89 @@
+import { NextRequest } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { readFile } from 'fs/promises'
+import { getTemplateImagePath, listTemplates } from '@/lib/mockupTemplates'
+import type { MockupGenerateRequest } from '@/types/mockup'
+
+function buildPrompt(req: MockupGenerateRequest): string {
+  if (req.family === 'Carrelage') {
+    let surface = 'floor or wall'
+    let restriction = ''
+    if (req.placement === 'mur') {
+      surface = 'wall'
+      restriction = ' Apply tiles only to the wall surface, not the floor.'
+    } else if (req.placement === 'sol') {
+      surface = 'floor'
+      restriction = ' Apply tiles only to the floor surface, not the walls.'
+    }
+    const dimClause = req.dimensions
+      ? ` The real-world tile size is ${req.dimensions}.`
+      : ''
+    const instructionClause = req.instruction ? ` Additional instruction: ${req.instruction}.` : ''
+
+    return `Replace the ${surface} covering in the reference scene with the provided tile image (${req.productName}).${dimClause}${restriction} CRITICAL RULES — you MUST follow all of them:
+1. Every single tile in the entire image must be EXACTLY the same size — no exceptions anywhere in the scene.
+2. The tile pattern must be a perfectly uniform grid: identical tile dimensions repeated consistently across the entire ${surface}.
+3. Tiles may be partially cut at edges, corners, or where the ${surface} meets other surfaces — but each visible portion must match the same grid unit size.
+4. NEVER vary the tile scale or apparent size in different parts of the image, even for artistic or perspective reasons.
+5. Copy the tile design, texture, color, and proportions from the provided image exactly — do not alter them.
+6. Maintain realistic lighting and perspective consistent with the reference scene.${instructionClause}`
+  }
+
+  const familyContext: Record<string, string> = {
+    'Menuiserie': 'door installed in a residential entrance or hallway, visible wall and floor context',
+    'Baies vitrées': 'bay window or sliding door installed in a living room with garden view',
+  }
+  const context = familyContext[req.family] ?? 'product installed in an appropriate room setting'
+  const dimClause = req.dimensions
+    ? ` The product dimensions are exactly ${req.dimensions} — preserve these exact proportions, do NOT resize or distort the product to fit the scene.`
+    : ''
+  const instructionClause = req.instruction ? ` Additional instruction: ${req.instruction}.` : ''
+
+  return `Replace the product in the reference scene with the provided product image (${req.productName}). Show the ${context}.${dimClause} Keep the product's exact design, texture, colors and proportions identical to the provided image. Maintain realistic perspective and lighting consistent with the scene.${instructionClause}`
+}
+
+export async function POST(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session) return Response.json({ error: 'Non authentifié' }, { status: 401 })
+
+  const apiKey = process.env.OPENAI_API_KEY
+  if (!apiKey) return Response.json({ error: 'OPENAI_API_KEY manquant' }, { status: 500 })
+
+  const body = await req.json() as MockupGenerateRequest
+
+  const templates = await listTemplates()
+  const template = templates.find(t => t.id === body.templateId)
+  if (!template) return Response.json({ error: 'Template introuvable' }, { status: 404 })
+
+  const templateBuffer = await readFile(getTemplateImagePath(template.filename))
+  const templateExt = template.filename.split('.').pop() ?? 'jpg'
+  const templateMime = templateExt === 'png' ? 'image/png' : 'image/jpeg'
+
+  const productBuffer = Buffer.from(body.productImageBase64, 'base64')
+
+  const form = new FormData()
+  form.append('model', 'gpt-image-1')
+  form.append('prompt', buildPrompt(body))
+  form.append('n', '1')
+  form.append('size', '1024x1024')
+  form.append('image[]', new Blob([templateBuffer], { type: templateMime }), `template.${templateExt}`)
+  form.append('image[]', new Blob([productBuffer], { type: 'image/png' }), 'product.png')
+
+  const openaiRes = await fetch('https://api.openai.com/v1/images/edits', {
+    method: 'POST',
+    headers: { Authorization: `Bearer ${apiKey}` },
+    body: form,
+  })
+
+  if (!openaiRes.ok) {
+    const err = await openaiRes.text()
+    return Response.json({ error: `OpenAI error: ${err}` }, { status: 502 })
+  }
+
+  const data = await openaiRes.json() as { data: Array<{ b64_json?: string }> }
+  const b64 = data.data?.[0]?.b64_json
+  if (!b64) return Response.json({ error: 'Pas de résultat OpenAI' }, { status: 502 })
+
+  return Response.json({ imageBase64: b64 })
+}

src/app/api/mockup/product-meta/[shopifyId]/route.ts

@@ -0,0 +1,30 @@
+import { NextRequest } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+
+const API_VERSION = '2024-01'
+
+export async function GET(_req: NextRequest, { params }: { params: { shopifyId: string } }) {
+  const session = await getServerSession(authOptions)
+  if (!session) return Response.json({ error: 'Non authentifié' }, { status: 401 })
+
+  const domain = process.env.SHOPIFY_STORE_DOMAIN
+  const token = process.env.SHOPIFY_ADMIN_API_TOKEN
+  if (!domain || !token) return Response.json({ error: 'Config Shopify manquante' }, { status: 500 })
+
+  const res = await fetch(
+    `https://${domain}/admin/api/${API_VERSION}/products/${params.shopifyId}/metafields.json`,
+    { headers: { 'X-Shopify-Access-Token': token, 'Content-Type': 'application/json' } },
+  )
+  if (!res.ok) return Response.json({ error: `Shopify error: ${res.status}` }, { status: 502 })
+
+  const data = await res.json()
+  const metafields = (data.metafields ?? []) as Array<{
+    namespace: string
+    key: string
+    value: string
+    type: string
+  }>
+
+  return Response.json({ metafields })
+}

src/app/api/mockup/templates/[id]/route.ts

@@ -0,0 +1,10 @@
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { deleteTemplate } from '@/lib/mockupTemplates'
+
+export async function DELETE(_req: Request, { params }: { params: { id: string } }) {
+  const session = await getServerSession(authOptions)
+  if (!session) return Response.json({ error: 'Non authentifié' }, { status: 401 })
+  await deleteTemplate(params.id)
+  return Response.json({ ok: true })
+}

src/app/api/mockup/templates/image/[filename]/route.ts

@@ -0,0 +1,14 @@
+import { readFile } from 'fs/promises'
+import { getTemplateImagePath } from '@/lib/mockupTemplates'
+
+export async function GET(_req: Request, { params }: { params: { filename: string } }) {
+  try {
+    const filePath = getTemplateImagePath(params.filename)
+    const buffer = await readFile(filePath)
+    const ext = params.filename.split('.').pop() ?? 'jpg'
+    const contentType = ext === 'png' ? 'image/png' : 'image/jpeg'
+    return new Response(buffer, { headers: { 'Content-Type': contentType } })
+  } catch {
+    return new Response('Not found', { status: 404 })
+  }
+}

src/app/api/mockup/templates/route.ts

@@ -0,0 +1,32 @@
+import { NextRequest } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { listTemplates, saveTemplate } from '@/lib/mockupTemplates'
+
+export async function GET() {
+  const session = await getServerSession(authOptions)
+  if (!session) return Response.json({ error: 'Non authentifié' }, { status: 401 })
+  const templates = await listTemplates()
+  return Response.json(templates)
+}
+
+export async function POST(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session) return Response.json({ error: 'Non authentifié' }, { status: 401 })
+
+  const form = await req.formData()
+  const name = form.get('name') as string
+  const family = form.get('family') as string
+  const placement = (form.get('placement') as string) || undefined
+  const description = (form.get('description') as string) ?? ''
+  const imageFile = form.get('image') as File
+
+  if (!name || !family || !imageFile) {
+    return Response.json({ error: 'name, family et image requis' }, { status: 400 })
+  }
+
+  const buffer = Buffer.from(await imageFile.arrayBuffer())
+  const ext = imageFile.name.split('.').pop() ?? 'jpg'
+  const template = await saveTemplate({ name, family, placement, description, filename: '' }, buffer, ext)
+  return Response.json(template)
+}

src/app/api/products/[id]/route.ts

@@ -0,0 +1,20 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { deleteShopifyProduct } from '@/lib/shopifySync'
+
+export async function DELETE(
+  _req: NextRequest,
+  { params }: { params: { id: string } },
+) {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+
+  try {
+    await deleteShopifyProduct(params.id)
+    return NextResponse.json({ ok: true })
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur inconnue'
+    return NextResponse.json({ error: message }, { status: 500 })
+  }
+}

src/app/api/products/duplicates/route.ts

@@ -0,0 +1,59 @@
+import { NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { fetchAllShopifyProducts } from '@/lib/shopifySync'
+import type { ShopifyProductFull } from '@/types/sync'
+
+export interface DuplicateGroup {
+  ref: string
+  products: Array<{
+    shopifyId: string
+    title: string
+    status: string
+    handle: string
+    shopifyUrl: string
+  }>
+}
+
+export async function GET() {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+
+  try {
+    const domain = process.env.SHOPIFY_STORE_DOMAIN ?? ''
+    const all = await fetchAllShopifyProducts()
+
+    // Grouper par ref (SKU)
+    const byRef = new Map<string, ShopifyProductFull[]>()
+    for (const p of all) {
+      const key = p.ref.trim().toLowerCase()
+      if (!byRef.has(key)) byRef.set(key, [])
+      byRef.get(key)!.push(p)
+    }
+
+    const groups: DuplicateGroup[] = []
+    for (const products of Array.from(byRef.values())) {
+      if (products.length < 2) continue
+      // Trier : le plus ancien (ID numérique le plus petit) en premier
+      products.sort((a: ShopifyProductFull, b: ShopifyProductFull) => Number(a.shopifyId) - Number(b.shopifyId))
+      groups.push({
+        ref: products[0].ref,
+        products: products.map((p: ShopifyProductFull) => ({
+          shopifyId: p.shopifyId,
+          title: p.title,
+          status: p.status,
+          handle: p.handle,
+          shopifyUrl: `https://${domain}/admin/products/${p.shopifyId}`,
+        })),
+      })
+    }
+
+    // Trier les groupes par ref
+    groups.sort((a, b) => a.ref.localeCompare(b.ref))
+
+    return NextResponse.json({ groups, total: groups.length })
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur inconnue'
+    return NextResponse.json({ error: message }, { status: 500 })
+  }
+}

src/app/api/products/list/route.test.ts

@@ -0,0 +1,59 @@
+import { GET } from './route'
+import * as shopifySync from '@/lib/shopifySync'
+import type { ShopifyProductFull } from '@/types/sync'
+
+jest.mock('@/lib/shopifySync')
+const mockFetch = shopifySync.fetchAllShopifyProducts as jest.MockedFunction<typeof shopifySync.fetchAllShopifyProducts>
+
+const PRODUCTS: ShopifyProductFull[] = [
+  { shopifyId: '1', ref: 'REF-001', handle: 'ref-001', title: 'Brique rouge', description: '', price: '12.50', stock: 100, status: 'active' },
+  { shopifyId: '2', ref: 'REF-002', handle: 'ref-002', title: 'Parpaing', description: '', price: '5.00', stock: 0, status: 'draft' },
+  { shopifyId: '3', ref: 'REF-003', handle: 'ref-003', title: 'Ardoise', description: '', price: '80.00', stock: 20, status: 'active' },
+]
+
+describe('GET /api/products/list', () => {
+  beforeEach(() => {
+    process.env.SHOPIFY_STORE_DOMAIN = 'test.myshopify.com'
+    process.env.SHOPIFY_ADMIN_API_TOKEN = 'token'
+    mockFetch.mockResolvedValue(PRODUCTS)
+  })
+  afterEach(() => jest.clearAllMocks())
+
+  it('retourne tous les produits sans filtre', async () => {
+    const req = new Request('http://localhost/api/products/list')
+    const res = await GET(req as never)
+    const body = await res.json()
+    expect(body.total).toBe(3)
+    expect(body.products).toHaveLength(3)
+  })
+
+  it('filtre par status=active', async () => {
+    const req = new Request('http://localhost/api/products/list?status=active')
+    const res = await GET(req as never)
+    const body = await res.json()
+    expect(body.total).toBe(2)
+    body.products.forEach((p: { status: string }) => expect(p.status).toBe('active'))
+  })
+
+  it('filtre par status=draft', async () => {
+    const req = new Request('http://localhost/api/products/list?status=draft')
+    const res = await GET(req as never)
+    const body = await res.json()
+    expect(body.total).toBe(1)
+    expect(body.products[0].ref).toBe('REF-002')
+  })
+
+  it('retourne shopifyUrl pour chaque produit', async () => {
+    const req = new Request('http://localhost/api/products/list')
+    const res = await GET(req as never)
+    const body = await res.json()
+    expect(body.products[0].shopifyUrl).toContain('test.myshopify.com/admin/products/1')
+  })
+
+  it('retourne 500 si Shopify inaccessible', async () => {
+    mockFetch.mockRejectedValue(new Error('network error'))
+    const req = new Request('http://localhost/api/products/list')
+    const res = await GET(req as never)
+    expect(res.status).toBe(500)
+  })
+})

src/app/api/products/list/route.ts

@@ -0,0 +1,34 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { fetchAllShopifyProducts } from '@/lib/shopifySync'
+import type { CatalogProduct, ProductListResponse } from '@/types/products'
+
+export async function GET(req: NextRequest): Promise<NextResponse<ProductListResponse | { error: string }>> {
+  try {
+    const { searchParams } = new URL(req.url)
+    const statusFilter = searchParams.get('status') ?? 'all'
+
+    const domain = process.env.SHOPIFY_STORE_DOMAIN ?? ''
+    const shopifyProducts = await fetchAllShopifyProducts()
+
+    let products: CatalogProduct[] = shopifyProducts.map((p) => ({
+      shopifyId: p.shopifyId,
+      ref: p.ref,
+      handle: p.handle,
+      title: p.title,
+      price: p.price,
+      stock: p.stock,
+      status: p.status as CatalogProduct['status'],
+      shopifyUrl: `https://${domain}/admin/products/${p.shopifyId}`,
+      images: p.images ?? [],
+    }))
+
+    if (statusFilter !== 'all') {
+      products = products.filter((p) => p.status === statusFilter)
+    }
+
+    return NextResponse.json({ products, total: products.length })
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur inconnue'
+    return NextResponse.json({ error: message }, { status: 500 })
+  }
+}

src/app/api/products/search-list/route.ts

@@ -0,0 +1,42 @@
+import { NextRequest, NextResponse } from 'next/server'
+
+const API_VERSION = '2024-01'
+
+// GET /api/products/search-list?q=peinture
+// Retourne jusqu'à 10 produits correspondant à la recherche (titre ou SKU)
+export async function GET(req: NextRequest) {
+  const q = new URL(req.url).searchParams.get('q')?.trim()
+  if (!q || q.length < 2) return NextResponse.json([])
+
+  const domain = process.env.SHOPIFY_STORE_DOMAIN
+  const token = process.env.SHOPIFY_ADMIN_API_TOKEN
+  if (!domain || !token) return NextResponse.json([], { status: 500 })
+
+  const headers = { 'X-Shopify-Access-Token': token }
+  const baseUrl = `https://${domain}/admin/api/${API_VERSION}`
+
+  try {
+    // Recherche par titre
+    const res = await fetch(
+      `${baseUrl}/products.json?title=${encodeURIComponent(q)}&limit=10&fields=id,title,variants`,
+      { headers },
+    )
+    if (!res.ok) return NextResponse.json([])
+    const data = await res.json()
+    const products = (data.products ?? []) as Array<{
+      id: number
+      title: string
+      variants: Array<{ sku: string }>
+    }>
+
+    const results = products.map(p => ({
+      shopifyId: String(p.id),
+      title: p.title,
+      sku: p.variants[0]?.sku ?? '',
+    }))
+
+    return NextResponse.json(results)
+  } catch {
+    return NextResponse.json([])
+  }
+}

src/app/api/products/search-sheets/route.ts

@@ -0,0 +1,73 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+
+/**
+ * Cherche un produit dans Google Sheets par sa référence (UGS, col C).
+ * Retourne le Shopify ID (col A) et le titre (col D) si trouvé.
+ * Parcourt tous les onglets.
+ */
+export async function GET(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ found: false }, { status: 401 })
+
+  const { searchParams } = new URL(req.url)
+  const ref = searchParams.get('ref')?.trim()
+  if (!ref) return NextResponse.json({ found: false }, { status: 400 })
+
+  const apiKey = process.env.GOOGLE_API_KEY
+  const sheetId = process.env.GOOGLE_SHEETS_ID
+  if (!apiKey || !sheetId) {
+    return NextResponse.json({ found: false, error: 'GOOGLE_API_KEY et GOOGLE_SHEETS_ID requis' }, { status: 500 })
+  }
+
+  try {
+    // Récupère la liste des onglets
+    const metaRes = await fetch(
+      `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}?key=${apiKey}&fields=sheets.properties.title`,
+    )
+    if (!metaRes.ok) throw new Error(`Sheets metadata error: ${metaRes.status}`)
+    const meta = await metaRes.json()
+    const tabs: string[] = (meta.sheets as Array<{ properties: { title: string } }>).map(
+      s => s.properties.title,
+    )
+
+    let bestMatch: { shopifyId: string; title: string; ugsLength: number } | null = null
+
+    for (const tab of tabs) {
+      const range = encodeURIComponent(`${tab}!A2:D`)
+      const res = await fetch(
+        `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}/values/${range}?key=${apiKey}`,
+      )
+      if (!res.ok) continue
+      const data = await res.json()
+      const rows = (data.values ?? []) as string[][]
+
+      for (const row of rows) {
+        const shopifyId = (row[0] ?? '').trim()
+        const ugs = (row[2] ?? '').trim()
+
+        const refLower = ref.toLowerCase()
+        const ugsLower = ugs.toLowerCase()
+        const wordBoundary = new RegExp(`(^|[^a-z0-9])${ugsLower.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')}([^a-z0-9]|$)`)
+        // Ne requiert pas shopifyId pour le match UGS — ID peut être absent si produit externe
+        const isMatch = ugs && wordBoundary.test(refLower)
+
+        if (isMatch && shopifyId) {
+          const title = (row[3] ?? '').trim()
+          if (!bestMatch || ugs.length > bestMatch.ugsLength) {
+            bestMatch = { shopifyId, title, ugsLength: ugs.length }
+          }
+        }
+      }
+    }
+
+    if (bestMatch) {
+      return NextResponse.json({ found: true, shopifyId: bestMatch.shopifyId, title: bestMatch.title })
+    }
+    return NextResponse.json({ found: false })
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur'
+    return NextResponse.json({ found: false, error: message }, { status: 500 })
+  }
+}

src/app/api/products/search/route.ts

@@ -0,0 +1,20 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { searchProductByRef } from '@/lib/shopify'
+
+export async function GET(req: NextRequest) {
+  const ref = req.nextUrl.searchParams.get('ref')
+
+  if (!ref || ref.trim() === '') {
+    return NextResponse.json({ error: 'Paramètre ref requis' }, { status: 400 })
+  }
+
+  try {
+    const result = await searchProductByRef(ref.trim())
+    console.log(`[search] ref="${ref.trim()}" → found=${result.found} id=${(result as {shopifyId?: string}).shopifyId ?? '-'}`)
+    return NextResponse.json(result)
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur inconnue'
+    console.error(`[search] ref="${ref.trim()}" → ERROR: ${message}`)
+    return NextResponse.json({ error: message }, { status: 500 })
+  }
+}

src/app/api/products/sheet-info/route.ts

@@ -0,0 +1,19 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { readSheetProducts } from '@/lib/googleSheets'
+
+export async function GET(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+
+  const ref = new URL(req.url).searchParams.get('ref')
+  if (!ref) return NextResponse.json({ error: 'Paramètre ref manquant' }, { status: 400 })
+
+  const products = await readSheetProducts()
+  const product = products.find(p => p.ref.toLowerCase() === ref.toLowerCase())
+
+  if (!product) return NextResponse.json({ error: 'Produit non trouvé' }, { status: 404 })
+
+  return NextResponse.json({ product })
+}

src/app/api/sheets/tabs/route.ts

@@ -0,0 +1,31 @@
+import { NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+
+export async function GET() {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+
+  const apiKey = process.env.GOOGLE_API_KEY
+  const sheetId = process.env.GOOGLE_SHEETS_ID
+  if (!apiKey || !sheetId) {
+    return NextResponse.json({ error: 'GOOGLE_API_KEY et GOOGLE_SHEETS_ID requis' }, { status: 500 })
+  }
+
+  try {
+    const url = `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}?key=${apiKey}&fields=sheets.properties.title`
+    const res = await fetch(url, { cache: 'no-store' })
+    if (!res.ok) {
+      const err = await res.text()
+      throw new Error(`Google Sheets API error: ${res.status} — ${err}`)
+    }
+    const data = await res.json()
+    const tabs: string[] = (data.sheets as Array<{ properties: { title: string } }>).map(
+      (s) => s.properties.title,
+    )
+    return NextResponse.json({ tabs })
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur inconnue'
+    return NextResponse.json({ error: message }, { status: 500 })
+  }
+}

src/app/api/sync/execute/route.ts

@@ -0,0 +1,113 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { prisma } from '@/lib/prisma'
+import {
+  createShopifyProduct,
+  updateShopifyProduct,
+  deactivateShopifyProduct,
+  getFirstVariantId,
+} from '@/lib/shopifySync'
+import type { SyncChange, SyncLogEntry, SyncStreamEvent } from '@/types/sync'
+
+export async function POST(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session?.user) {
+    return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+  }
+
+  let changes: SyncChange[]
+  try {
+    const body = await req.json()
+    changes = body.changes
+  } catch {
+    return NextResponse.json({ error: 'Corps JSON invalide' }, { status: 400 })
+  }
+
+  if (!Array.isArray(changes) || changes.length === 0) {
+    return NextResponse.json({ error: 'Aucun changement à appliquer' }, { status: 400 })
+  }
+
+  const userId = (session.user as { id: string }).id
+  const encoder = new TextEncoder()
+
+  const stream = new ReadableStream({
+    async start(controller) {
+      const send = (event: SyncStreamEvent) => {
+        controller.enqueue(encoder.encode(JSON.stringify(event) + '\n'))
+      }
+
+      const log: SyncLogEntry[] = []
+      let created = 0, updated = 0, deactivated = 0, errors = 0
+      const total = changes.filter((c) => c.type !== 'unchanged').length
+      let current = 0
+
+      for (const change of changes) {
+        if (change.type === 'unchanged') continue
+        current++
+
+        try {
+          if (change.type === 'create') {
+            await createShopifyProduct(change.sheetProduct!)
+            created++
+            const msg = `✓ ${change.ref} créé`
+            log.push({ ref: change.ref, action: 'create', status: 'success', message: msg })
+            send({ type: 'progress', current, total, message: msg })
+
+          } else if (change.type === 'update') {
+            const variantId = await getFirstVariantId(change.shopifyProduct!.shopifyId)
+            await updateShopifyProduct(
+              change.shopifyProduct!.shopifyId,
+              change.sheetProduct!,
+              variantId,
+            )
+            updated++
+            const fields = change.changedFields?.map((f) => f.field).join(', ') ?? ''
+            const msg = `✓ ${change.ref} mis à jour (${fields})`
+            log.push({ ref: change.ref, action: 'update', status: 'success', message: msg })
+            send({ type: 'progress', current, total, message: msg })
+
+          } else if (change.type === 'deactivate') {
+            await deactivateShopifyProduct(change.shopifyProduct!.shopifyId)
+            deactivated++
+            const msg = `✓ ${change.ref} désactivé`
+            log.push({ ref: change.ref, action: 'deactivate', status: 'success', message: msg })
+            send({ type: 'progress', current, total, message: msg })
+          }
+        } catch (err) {
+          errors++
+          const msg = `✗ ${change.ref} : ${(err as Error).message}`
+          log.push({ ref: change.ref, action: change.type as SyncLogEntry['action'], status: 'error', message: msg })
+          send({ type: 'progress', current, total, message: msg })
+        }
+      }
+
+      const syncStatus = errors === 0 ? 'success' : errors === total ? 'error' : 'partial'
+      try {
+        await prisma.syncRun.create({
+          data: {
+            userId,
+            status: syncStatus,
+            created,
+            updated,
+            deactivated,
+            errors,
+            log: JSON.stringify(log),
+          },
+        })
+      } catch (dbErr) {
+        console.error('Erreur sauvegarde SyncRun:', dbErr)
+      }
+
+      send({
+        type: 'done',
+        summary: { created, updated, deactivated, errors, status: syncStatus },
+      })
+      controller.close()
+    },
+  })
+
+  return new Response(stream, {
+    headers: { 'Content-Type': 'application/x-ndjson; charset=utf-8' },
+  })
+}

src/app/api/sync/history/route.ts

@@ -0,0 +1,33 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { prisma } from '@/lib/prisma'
+import type { SyncHistoryEntry, SyncLogEntry } from '@/types/sync'
+
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+export async function GET(_req: NextRequest) {
+  try {
+    const runs = await prisma.syncRun.findMany({
+      orderBy: { createdAt: 'desc' },
+      take: 20,
+      include: { user: { select: { name: true } } },
+    })
+
+    const entries: SyncHistoryEntry[] = runs.map((run) => ({
+      id: run.id,
+      createdAt: run.createdAt.toISOString(),
+      userName: run.user.name,
+      status: run.status as SyncHistoryEntry['status'],
+      created: run.created,
+      updated: run.updated,
+      deactivated: run.deactivated,
+      errors: run.errors,
+      log: (() => {
+        try { return JSON.parse(run.log) as SyncLogEntry[] } catch { return [] }
+      })(),
+    }))
+
+    return NextResponse.json(entries)
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur inconnue'
+    return NextResponse.json({ error: message }, { status: 500 })
+  }
+}

src/app/api/sync/preview/route.ts

@@ -0,0 +1,20 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { readSheetProducts } from '@/lib/googleSheets'
+import { fetchAllShopifyProducts } from '@/lib/shopifySync'
+import { computeDiff } from '@/lib/syncDiff'
+
+export async function GET(req: NextRequest) {
+  const tab = new URL(req.url).searchParams.get('tab') ?? undefined
+  try {
+    const [sheetProducts, shopifyProducts] = await Promise.all([
+      readSheetProducts(tab),
+      fetchAllShopifyProducts(),
+    ])
+
+    const diff = computeDiff(sheetProducts, shopifyProducts, tab)
+    return NextResponse.json(diff)
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur inconnue'
+    return NextResponse.json({ error: message }, { status: 500 })
+  }
+}

src/app/api/theme/product-banner-data/route.ts

@@ -0,0 +1,85 @@
+import { NextRequest, NextResponse } from 'next/server'
+
+const API_VERSION = '2024-01'
+
+function getShopifyConfig() {
+  const domain = process.env.SHOPIFY_STORE_DOMAIN
+  const token = process.env.SHOPIFY_ADMIN_API_TOKEN
+  if (!domain || !token) throw new Error('Config Shopify manquante')
+  return {
+    baseUrl: `https://${domain}/admin/api/${API_VERSION}`,
+    headers: { 'X-Shopify-Access-Token': token, 'Content-Type': 'application/json' },
+  }
+}
+
+export interface BannerProductData {
+  id: string
+  title: string
+  price: string
+  compareAtPrice: string | null
+  sku: string
+  imageUrl: string | null
+  allImages: string[]
+}
+
+export async function GET(req: NextRequest) {
+  const { searchParams } = new URL(req.url)
+  const ref = searchParams.get('ref')
+  const id = searchParams.get('id')
+
+  try {
+    const { baseUrl, headers } = getShopifyConfig()
+
+    let product: Record<string, unknown> | null = null
+
+    if (id) {
+      const res = await fetch(`${baseUrl}/products/${id}.json?fields=id,title,variants,images`, { headers })
+      if (res.ok) {
+        const data = await res.json()
+        product = data.product
+      }
+    } else if (ref) {
+      // Recherche par SKU via GraphQL
+      const domain = process.env.SHOPIFY_STORE_DOMAIN
+      const gqlRes = await fetch(`https://${domain}/admin/api/${API_VERSION}/graphql.json`, {
+        method: 'POST',
+        headers,
+        body: JSON.stringify({
+          query: `{ productVariants(first: 5, query: "sku:${ref.replace(/"/g, '')}") {
+            edges { node { sku product { id legacyResourceId title } } }
+          } }`,
+        }),
+      })
+      const gqlData = await gqlRes.json()
+      const edges = gqlData?.data?.productVariants?.edges ?? []
+      const match = edges.find((e: { node: { sku: string } }) =>
+        e.node.sku.toLowerCase() === ref.toLowerCase()
+      )
+      if (match) {
+        const legacyId = match.node.product.legacyResourceId
+        const res = await fetch(`${baseUrl}/products/${legacyId}.json?fields=id,title,variants,images`, { headers })
+        if (res.ok) product = (await res.json()).product
+      }
+    }
+
+    if (!product) return NextResponse.json({ error: 'Produit introuvable' }, { status: 404 })
+
+    const variants = product.variants as Array<{ price: string; compare_at_price: string | null; sku: string }>
+    const images = product.images as Array<{ src: string }>
+    const variant = variants[0]
+
+    const result: BannerProductData = {
+      id: String(product.id),
+      title: product.title as string,
+      price: variant?.price ?? '',
+      compareAtPrice: variant?.compare_at_price ?? null,
+      sku: variant?.sku ?? '',
+      imageUrl: images[0]?.src ?? null,
+      allImages: images.map(i => i.src),
+    }
+
+    return NextResponse.json(result)
+  } catch (err) {
+    return NextResponse.json({ error: (err as Error).message }, { status: 500 })
+  }
+}

src/app/api/theme/slideshow/route.ts

@@ -0,0 +1,33 @@
+import { NextRequest, NextResponse } from 'next/server'
+import {
+  getActiveThemeId,
+  getHomepageTemplate,
+  extractSlideshow,
+  applySlideshow,
+  saveHomepageTemplate,
+} from '@/lib/shopifyTheme'
+import type { SlideshowSection } from '@/lib/shopifyTheme'
+
+export async function GET() {
+  try {
+    const themeId = await getActiveThemeId()
+    const template = await getHomepageTemplate(themeId)
+    const slideshow = extractSlideshow(template)
+    if (!slideshow) return NextResponse.json({ error: 'Section slideshow-custom introuvable' }, { status: 404 })
+    return NextResponse.json({ slideshow, themeId })
+  } catch (err) {
+    return NextResponse.json({ error: (err as Error).message }, { status: 500 })
+  }
+}
+
+export async function PUT(req: NextRequest) {
+  try {
+    const body = await req.json() as { slideshow: SlideshowSection; themeId: string }
+    const template = await getHomepageTemplate(body.themeId)
+    const updated = applySlideshow(template, body.slideshow)
+    await saveHomepageTemplate(body.themeId, updated)
+    return NextResponse.json({ ok: true })
+  } catch (err) {
+    return NextResponse.json({ error: (err as Error).message }, { status: 500 })
+  }
+}

src/app/api/theme/upload-file/route.ts

@@ -0,0 +1,15 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { uploadFileToShopify } from '@/lib/shopifyTheme'
+
+export async function POST(req: NextRequest) {
+  try {
+    const { imageBase64, filename } = await req.json() as { imageBase64: string; filename: string }
+    if (!imageBase64 || !filename) {
+      return NextResponse.json({ error: 'imageBase64 et filename requis' }, { status: 400 })
+    }
+    const shopifyRef = await uploadFileToShopify(imageBase64, filename)
+    return NextResponse.json({ shopifyRef })
+  } catch (err) {
+    return NextResponse.json({ error: (err as Error).message }, { status: 500 })
+  }
+}

src/app/layout.tsx

@@ -13,6 +13,24 @@ export const metadata: Metadata = {
 export default function RootLayout({ children }: { children: React.ReactNode }) {
   return (
     <html lang="fr">
+      <head>
+        {/* Import map requis par @imgly/background-removal chargé depuis CDN.
+            Doit être placé avant tout script module — Next.js le respecte car
+            le layout est rendu côté serveur avant injection des chunks. */}
+        <script
+          type="importmap"
+          // eslint-disable-next-line react/no-danger
+          dangerouslySetInnerHTML={{
+            __html: JSON.stringify({
+              imports: {
+                'onnxruntime-web': 'https://cdn.jsdelivr.net/npm/onnxruntime-web@1.21.0/dist/ort.all.min.mjs',
+                'onnxruntime-web/webgpu': 'https://cdn.jsdelivr.net/npm/onnxruntime-web@1.21.0/dist/ort.webgpu.min.mjs',
+                'onnxruntime-web/wasm': 'https://cdn.jsdelivr.net/npm/onnxruntime-web@1.21.0/dist/ort.wasm.min.mjs',
+              },
+            }),
+          }}
+        />
+      </head>
       <body className={inter.className}>
         <SessionProvider>{children}</SessionProvider>
       </body>

src/components/bannieres/BannerBuilder.tsx

@@ -0,0 +1,417 @@
+'use client'
+import { useState, useEffect, useRef, useCallback } from 'react'
+import { COLOR_SCHEMES, renderBanner } from '@/lib/client/bannerRenderer'
+import type { BannerConfig, ColorScheme } from '@/lib/client/bannerRenderer'
+import type { BannerProductData } from '@/app/api/theme/product-banner-data/route'
+
+interface Props {
+  onApply: (shopifyRef: string) => void
+  onClose: () => void
+}
+
+interface SearchSuggestion {
+  shopifyId: string
+  title: string
+  sku: string
+}
+
+function formatPrice(price: string): string {
+  if (!price) return ''
+  const n = parseFloat(price)
+  return isNaN(n) ? price : `${Math.round(n)} €`
+}
+
+function blobToBase64(blob: Blob): Promise<string> {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader()
+    reader.onload = () => resolve((reader.result as string).split(',')[1])
+    reader.onerror = reject
+    reader.readAsDataURL(blob)
+  })
+}
+
+export function BannerBuilder({ onApply, onClose }: Props) {
+  // Combobox produit
+  const [inputValue, setInputValue] = useState('')
+  const [suggestions, setSuggestions] = useState<SearchSuggestion[]>([])
+  const [showSuggestions, setShowSuggestions] = useState(false)
+  const [loadingSuggestions, setLoadingSuggestions] = useState(false)
+  const [loadingProduct, setLoadingProduct] = useState(false)
+  const [product, setProduct] = useState<BannerProductData | null>(null)
+  const [searchError, setSearchError] = useState<string | null>(null)
+  const comboRef = useRef<HTMLDivElement>(null)
+
+  // Banner config
+  const [scheme, setScheme] = useState<ColorScheme>('dark-blue')
+  const [promoLabel, setPromoLabel] = useState('Destockage - Durée limitée')
+  const [title, setTitle] = useState('')
+  const [price, setPrice] = useState('')
+  const [comparePrice, setComparePrice] = useState('')
+  const [selectedImageUrl, setSelectedImageUrl] = useState<string | null>(null)
+  const [backgroundBlob, setBackgroundBlob] = useState<Blob | null>(null)
+  const [backgroundPreview, setBackgroundPreview] = useState<string | null>(null)
+  const bgFileRef = useRef<HTMLInputElement>(null)
+
+  // Generation
+  const [rendering, setRendering] = useState(false)
+  const [previewUrl, setPreviewUrl] = useState<string | null>(null)
+  const [uploading, setUploading] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+
+  const previewRef = useRef<string | null>(null)
+
+  // Ferme les suggestions si clic extérieur
+  useEffect(() => {
+    const handler = (e: MouseEvent) => {
+      if (comboRef.current && !comboRef.current.contains(e.target as Node)) {
+        setShowSuggestions(false)
+      }
+    }
+    document.addEventListener('mousedown', handler)
+    return () => document.removeEventListener('mousedown', handler)
+  }, [])
+
+  // Recherche des suggestions (debounce 300ms)
+  useEffect(() => {
+    const q = inputValue.trim()
+    if (q.length < 2) { setSuggestions([]); setShowSuggestions(false); return }
+    const t = setTimeout(async () => {
+      setLoadingSuggestions(true)
+      try {
+        const res = await fetch(`/api/products/search-list?q=${encodeURIComponent(q)}`)
+        if (!res.ok) return
+        const data = await res.json() as SearchSuggestion[]
+        setSuggestions(data)
+        setShowSuggestions(data.length > 0)
+      } catch { /* silencieux */ } finally {
+        setLoadingSuggestions(false)
+      }
+    }, 300)
+    return () => clearTimeout(t)
+  }, [inputValue])
+
+  const selectSuggestion = async (s: SearchSuggestion) => {
+    setInputValue(s.title)
+    setShowSuggestions(false)
+    setSuggestions([])
+    setLoadingProduct(true)
+    setSearchError(null)
+    setProduct(null)
+    setPreviewUrl(null)
+    try {
+      const res = await fetch(`/api/theme/product-banner-data?id=${s.shopifyId}`)
+      const data = await res.json()
+      if (!res.ok) throw new Error(data.error)
+      const p = data as BannerProductData
+      setProduct(p)
+      setTitle(p.title.toUpperCase())
+      setPrice(formatPrice(p.price))
+      setComparePrice(p.compareAtPrice ? formatPrice(p.compareAtPrice) : '')
+      setSelectedImageUrl(p.imageUrl)
+    } catch (e) {
+      setSearchError((e as Error).message)
+    } finally {
+      setLoadingProduct(false)
+    }
+  }
+
+  const handleBgFile = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0]
+    if (!file) return
+    setBackgroundBlob(file)
+    const url = URL.createObjectURL(file)
+    if (backgroundPreview) URL.revokeObjectURL(backgroundPreview)
+    setBackgroundPreview(url)
+    e.target.value = ''
+  }
+
+  const removeBg = () => {
+    if (backgroundPreview) URL.revokeObjectURL(backgroundPreview)
+    setBackgroundBlob(null)
+    setBackgroundPreview(null)
+  }
+
+  const getConfig = useCallback((): BannerConfig => ({
+    scheme,
+    promoLabel,
+    title,
+    price,
+    comparePrice,
+    productImageUrl: selectedImageUrl,
+    backgroundImageBlob: backgroundBlob,
+  }), [scheme, promoLabel, title, price, comparePrice, selectedImageUrl, backgroundBlob])
+
+  const generate = useCallback(async () => {
+    setRendering(true)
+    setError(null)
+    try {
+      const blob = await renderBanner(getConfig())
+      const url = URL.createObjectURL(blob)
+      if (previewRef.current) URL.revokeObjectURL(previewRef.current)
+      previewRef.current = url
+      setPreviewUrl(url)
+    } catch (e) {
+      setError((e as Error).message)
+    } finally {
+      setRendering(false)
+    }
+  }, [getConfig])
+
+  // Régénère automatiquement quand les paramètres changent (debounce 600ms)
+  useEffect(() => {
+    if (!title && !product) return
+    const t = setTimeout(() => { generate() }, 600)
+    return () => clearTimeout(t)
+  }, [scheme, promoLabel, title, price, comparePrice, selectedImageUrl, backgroundBlob]) // eslint-disable-line react-hooks/exhaustive-deps
+
+  const applyToSlide = async () => {
+    if (!previewRef.current) return
+    setUploading(true)
+    setError(null)
+    try {
+      // Convertit l'objectURL en blob
+      const res = await fetch(previewRef.current)
+      const blob = await res.blob()
+      const base64 = await blobToBase64(blob)
+      const filename = `banniere-${(product?.sku ?? 'custom').toLowerCase().replace(/[^a-z0-9]/g, '-')}-${Date.now()}.jpg`
+
+      const uploadRes = await fetch('/api/theme/upload-file', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ imageBase64: base64, filename }),
+      })
+      const uploadData = await uploadRes.json()
+      if (!uploadRes.ok) throw new Error(uploadData.error)
+      onApply(uploadData.shopifyRef)
+    } catch (e) {
+      setError((e as Error).message)
+    } finally {
+      setUploading(false)
+    }
+  }
+
+  const schemeEntries = Object.entries(COLOR_SCHEMES) as [ColorScheme, typeof COLOR_SCHEMES[ColorScheme]][]
+
+  return (
+    <div
+      className="fixed inset-0 z-50 flex items-center justify-center bg-black/80 p-4"
+      onClick={e => { if (e.target === e.currentTarget) onClose() }}
+    >
+      <div className="bg-slate-800 border border-slate-700 rounded-xl w-full max-w-5xl max-h-[95vh] flex flex-col">
+
+        {/* Header */}
+        <div className="flex items-center justify-between p-4 border-b border-slate-700">
+          <h2 className="text-white font-semibold text-sm">Créer une bannière</h2>
+          <button type="button" onClick={onClose} className="text-gray-400 hover:text-white text-lg leading-none">✕</button>
+        </div>
+
+        <div className="flex flex-1 overflow-hidden">
+          {/* ── Panneau gauche : configuration ─────────────────────────────── */}
+          <div className="w-80 flex-shrink-0 overflow-y-auto border-r border-slate-700 p-4 space-y-5">
+
+            {/* Recherche produit — combobox */}
+            <section>
+              <h3 className="text-xs font-semibold text-gray-300 uppercase tracking-wide mb-2">Produit</h3>
+              <div className="relative" ref={comboRef}>
+                <div className="relative">
+                  <input
+                    type="text"
+                    value={inputValue}
+                    onChange={e => { setInputValue(e.target.value); setProduct(null) }}
+                    onFocus={() => suggestions.length > 0 && setShowSuggestions(true)}
+                    placeholder="Rechercher par nom ou référence…"
+                    className="w-full bg-slate-700 border border-slate-600 rounded px-2 py-1.5 pr-7 text-xs text-white focus:outline-none focus:ring-1 focus:ring-indigo-500"
+                  />
+                  <span className="absolute right-2 top-1/2 -translate-y-1/2 text-slate-400 text-xs pointer-events-none">
+                    {loadingSuggestions || loadingProduct ? '⏳' : '🔍'}
+                  </span>
+                </div>
+                {showSuggestions && suggestions.length > 0 && (
+                  <div className="absolute z-20 w-full mt-1 bg-slate-700 border border-slate-600 rounded shadow-xl max-h-52 overflow-y-auto">
+                    {suggestions.map(s => (
+                      <button
+                        key={s.shopifyId}
+                        type="button"
+                        onMouseDown={e => { e.preventDefault(); selectSuggestion(s) }}
+                        className="w-full text-left px-3 py-2 hover:bg-slate-600 border-b border-slate-600 last:border-0"
+                      >
+                        <p className="text-xs text-white truncate">{s.title}</p>
+                        <p className="text-xs text-slate-400 font-mono">{s.sku}</p>
+                      </button>
+                    ))}
+                  </div>
+                )}
+              </div>
+              {searchError && <p className="text-xs text-red-400 mt-1">{searchError}</p>}
+              {product && (
+                <div className="mt-2 p-2 bg-slate-700 rounded text-xs">
+                  <p className="text-white font-medium truncate">{product.title}</p>
+                  <p className="text-slate-400">{product.sku} · {formatPrice(product.price)}</p>
+                  {product.allImages.length > 1 && (
+                    <div className="mt-2">
+                      <p className="text-slate-400 mb-1">Choisir l&apos;image :</p>
+                      <div className="flex gap-1 flex-wrap">
+                        {product.allImages.map((url, i) => (
+                          <button
+                            key={i}
+                            type="button"
+                            onClick={() => setSelectedImageUrl(url)}
+                            className={`rounded overflow-hidden border-2 transition-all ${selectedImageUrl === url ? 'border-indigo-500' : 'border-slate-600'}`}
+                          >
+                            <img src={url} alt={`img ${i}`} className="w-12 h-12 object-cover" />
+                          </button>
+                        ))}
+                      </div>
+                    </div>
+                  )}
+                </div>
+              )}
+            </section>
+
+            {/* Image de fond */}
+            <section>
+              <h3 className="text-xs font-semibold text-gray-300 uppercase tracking-wide mb-2">Image de fond</h3>
+              {backgroundPreview ? (
+                <div className="relative rounded overflow-hidden border border-slate-600">
+                  <img src={backgroundPreview} alt="Fond" className="w-full h-24 object-cover" />
+                  <button
+                    type="button"
+                    onClick={removeBg}
+                    className="absolute top-1 right-1 bg-black/70 hover:bg-red-900 text-white text-xs px-1.5 py-0.5 rounded"
+                  >
+                    ✕ Retirer
+                  </button>
+                </div>
+              ) : (
+                <button
+                  type="button"
+                  onClick={() => bgFileRef.current?.click()}
+                  className="w-full py-3 border-2 border-dashed border-slate-600 hover:border-indigo-500 rounded text-xs text-slate-400 hover:text-indigo-400 transition-colors"
+                >
+                  + Uploader une image de fond
+                </button>
+              )}
+              <input ref={bgFileRef} type="file" accept="image/*" className="hidden" onChange={handleBgFile} />
+              {backgroundPreview && (
+                <p className="text-xs text-slate-500 mt-1">Un overlay sombre est appliqué automatiquement pour la lisibilité du texte.</p>
+              )}
+            </section>
+
+            {/* Thème couleur */}
+            <section>
+              <h3 className="text-xs font-semibold text-gray-300 uppercase tracking-wide mb-2">
+                {backgroundPreview ? 'Couleur du texte' : 'Thème couleur'}
+              </h3>
+              <div className="grid grid-cols-2 gap-1.5">
+                {schemeEntries.map(([key, s]) => (
+                  <button
+                    key={key}
+                    type="button"
+                    onClick={() => setScheme(key)}
+                    style={{ background: s.bg, borderColor: scheme === key ? '#6366f1' : '#475569' }}
+                    className={`px-3 py-2 rounded text-xs border-2 font-medium transition-all`}
+                  >
+                    <span style={{ color: s.titleColor }}>{s.label}</span>
+                  </button>
+                ))}
+              </div>
+            </section>
+
+            {/* Textes */}
+            <section>
+              <h3 className="text-xs font-semibold text-gray-300 uppercase tracking-wide mb-2">Textes</h3>
+              <div className="space-y-2">
+                <div>
+                  <label className="block text-xs text-slate-400 mb-0.5">Badge promotionnel</label>
+                  <input
+                    type="text"
+                    value={promoLabel}
+                    onChange={e => setPromoLabel(e.target.value)}
+                    className="w-full bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-xs text-white focus:outline-none focus:ring-1 focus:ring-indigo-500"
+                  />
+                </div>
+                <div>
+                  <label className="block text-xs text-slate-400 mb-0.5">Titre produit</label>
+                  <textarea
+                    value={title}
+                    onChange={e => setTitle(e.target.value)}
+                    rows={3}
+                    className="w-full bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-xs text-white focus:outline-none focus:ring-1 focus:ring-indigo-500 resize-none"
+                  />
+                </div>
+                <div className="flex gap-2">
+                  <div className="flex-1">
+                    <label className="block text-xs text-slate-400 mb-0.5">Prix affiché</label>
+                    <input
+                      type="text"
+                      value={price}
+                      onChange={e => setPrice(e.target.value)}
+                      className="w-full bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-xs text-white focus:outline-none focus:ring-1 focus:ring-indigo-500"
+                    />
+                  </div>
+                  <div className="flex-1">
+                    <label className="block text-xs text-slate-400 mb-0.5">Prix barré</label>
+                    <input
+                      type="text"
+                      value={comparePrice}
+                      onChange={e => setComparePrice(e.target.value)}
+                      placeholder="optionnel"
+                      className="w-full bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-xs text-white focus:outline-none focus:ring-1 focus:ring-indigo-500"
+                    />
+                  </div>
+                </div>
+              </div>
+            </section>
+          </div>
+
+          {/* ── Panneau droit : aperçu ──────────────────────────────────────── */}
+          <div className="flex-1 flex flex-col overflow-hidden">
+            <div className="flex-1 flex items-center justify-center bg-slate-900 p-4 overflow-auto">
+              {rendering && (
+                <p className="text-slate-500 text-sm">Génération en cours…</p>
+              )}
+              {!rendering && previewUrl && (
+                <img
+                  src={previewUrl}
+                  alt="Aperçu bannière"
+                  className="max-w-full rounded shadow-lg"
+                  style={{ maxHeight: '60vh' }}
+                />
+              )}
+              {!rendering && !previewUrl && (
+                <div className="text-center text-slate-600">
+                  <p className="text-4xl mb-2">🎨</p>
+                  <p className="text-sm">Recherchez un produit pour commencer</p>
+                </div>
+              )}
+            </div>
+
+            {/* Footer actions */}
+            <div className="p-4 border-t border-slate-700 flex items-center justify-between gap-3">
+              <div className="flex items-center gap-3">
+                {error && <p className="text-xs text-red-400">{error}</p>}
+                <span className="text-xs text-slate-500">Format : 1500 × 500 px</span>
+              </div>
+              <div className="flex gap-2">
+                <button
+                  onClick={generate}
+                  disabled={rendering || (!title && !product)}
+                  className="px-4 py-2 text-xs bg-slate-700 hover:bg-slate-600 text-white rounded font-medium disabled:opacity-40"
+                >
+                  {rendering ? '⏳ Rendu…' : '↺ Régénérer'}
+                </button>
+                <button
+                  onClick={applyToSlide}
+                  disabled={!previewUrl || uploading || rendering}
+                  className="px-4 py-2 text-xs bg-green-700 hover:bg-green-600 text-white rounded font-medium disabled:opacity-40"
+                >
+                  {uploading ? '⬆️ Upload…' : '✓ Appliquer à la slide'}
+                </button>
+              </div>
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}

src/components/common/ErrorBoundary.tsx

@@ -0,0 +1,42 @@
+'use client'
+import { Component, type ReactNode } from 'react'
+
+interface Props {
+  children: ReactNode
+  fallback?: (error: Error, reset: () => void) => ReactNode
+}
+
+interface State {
+  error: Error | null
+}
+
+export class ErrorBoundary extends Component<Props, State> {
+  state: State = { error: null }
+
+  static getDerivedStateFromError(error: Error): State {
+    return { error }
+  }
+
+  reset = () => this.setState({ error: null })
+
+  render() {
+    if (this.state.error) {
+      if (this.props.fallback) return this.props.fallback(this.state.error, this.reset)
+      return (
+        <div className="p-6">
+          <div className="bg-red-900/30 border border-red-700 rounded-xl p-6 text-center space-y-3">
+            <p className="text-red-300 font-semibold">Une erreur est survenue</p>
+            <p className="text-red-400 text-sm font-mono">{this.state.error.message}</p>
+            <button
+              onClick={this.reset}
+              className="px-4 py-2 bg-slate-700 hover:bg-slate-600 text-white rounded-lg text-sm"
+            >
+              Réessayer
+            </button>
+          </div>
+        </div>
+      )
+    }
+    return this.props.children
+  }
+}

src/components/common/FamilySelector.tsx

@@ -0,0 +1,59 @@
+'use client'
+import { useEffect, useState } from 'react'
+
+interface Props {
+  onSelect: (tab: string) => void
+}
+
+export function FamilySelector({ onSelect }: Props) {
+  const [tabs, setTabs] = useState<string[]>([])
+  const [loading, setLoading] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    fetch('/api/sheets/tabs')
+      .then((r) => r.json())
+      .then((data) => {
+        if (data.error) throw new Error(data.error)
+        setTabs(data.tabs)
+      })
+      .catch((e: Error) => setError(e.message))
+      .finally(() => setLoading(false))
+  }, [])
+
+  if (loading) {
+    return (
+      <div className="flex items-center gap-2 text-slate-400 text-sm py-8 justify-center">
+        <span className="animate-spin">⏳</span> Chargement des familles…
+      </div>
+    )
+  }
+
+  if (error) {
+    return (
+      <div className="p-4 bg-red-900/30 border border-red-700 rounded-lg text-red-300 text-sm">
+        Impossible de charger les familles : {error}
+      </div>
+    )
+  }
+
+  return (
+    <div className="space-y-3">
+      <p className="text-slate-300 text-sm">
+        Choisissez une famille (onglet Google Sheets) pour travailler uniquement sur celle-ci.
+      </p>
+      <div className="grid grid-cols-2 sm:grid-cols-3 lg:grid-cols-4 gap-2">
+        {tabs.map((tab) => (
+          <button
+            key={tab}
+            onClick={() => onSelect(tab)}
+            className="flex items-center gap-2 px-4 py-3 bg-slate-700 hover:bg-indigo-700 border border-slate-600 hover:border-indigo-500 rounded-xl text-sm text-slate-200 hover:text-white font-medium transition-all text-left group"
+          >
+            <span className="text-base group-hover:scale-110 transition-transform">📂</span>
+            <span className="truncate">{tab}</span>
+          </button>
+        ))}
+      </div>
+    </div>
+  )
+}

src/components/creation/CreationProgress.tsx

@@ -0,0 +1,66 @@
+'use client'
+import type { CreationStreamEvent } from '@/types/creation'
+
+interface Props {
+  events: CreationStreamEvent[]
+  done: boolean
+}
+
+export function CreationProgress({ events, done }: Props) {
+  const lastProgress = [...events].reverse().find(e => e.type === 'progress') as Extract<CreationStreamEvent, { type: 'progress' }> | undefined
+  const doneEvent = events.find(e => e.type === 'done') as Extract<CreationStreamEvent, { type: 'done' }> | undefined
+  const errors = events.filter(e => e.type === 'error') as Array<Extract<CreationStreamEvent, { type: 'error' }>>
+  const skipped = events.filter(e => e.type === 'skipped') as Array<Extract<CreationStreamEvent, { type: 'skipped' }>>
+
+  return (
+    <div className="space-y-4">
+      {lastProgress && !done && (
+        <div>
+          <div className="flex justify-between text-sm text-gray-300 mb-1">
+            <span>{lastProgress.step}</span>
+            <span>{lastProgress.current}/{lastProgress.total}</span>
+          </div>
+          <div className="w-full bg-slate-700 rounded-full h-2">
+            <div className="bg-indigo-600 h-2 rounded-full transition-all"
+              style={{ width: `${(lastProgress.current / lastProgress.total) * 100}%` }} />
+          </div>
+          <p className="text-xs text-gray-400 mt-1 truncate">{lastProgress.tab} — {lastProgress.title}</p>
+        </div>
+      )}
+      {skipped.length > 0 && (
+        <div className="space-y-1">
+          {skipped.map((e, i) => (
+            <div key={i} className="flex gap-2 p-2 bg-amber-900/20 border border-amber-800/40 rounded text-xs text-amber-300">
+              <span>⚠️</span>
+              <span className="font-medium">{e.title}</span>
+              <span className="text-amber-500">— SKU {e.sku} déjà présent dans Shopify, ignoré</span>
+            </div>
+          ))}
+        </div>
+      )}
+      {errors.length > 0 && (
+        <div className="space-y-1">
+          {errors.map((e, i) => (
+            <div key={i} className="flex gap-2 p-2 bg-red-900/30 rounded text-xs text-red-300">
+              <span className="font-medium">{e.title}</span>
+              <span className="text-red-400">— {e.message}</span>
+            </div>
+          ))}
+        </div>
+      )}
+      {doneEvent && (
+        <div className={`p-4 rounded-lg ${doneEvent.summary.status === 'success' ? 'bg-green-900/30 border border-green-700' : doneEvent.summary.status === 'partial' ? 'bg-yellow-900/30 border border-yellow-700' : 'bg-red-900/30 border border-red-700'}`}>
+          <p className={`font-semibold ${doneEvent.summary.status === 'success' ? 'text-green-300' : doneEvent.summary.status === 'partial' ? 'text-yellow-300' : 'text-red-300'}`}>
+            {doneEvent.summary.status === 'success' ? '✓ Terminé' : doneEvent.summary.status === 'partial' ? '⚠ Partiel' : '✗ Erreur'}
+          </p>
+          <p className="text-sm text-gray-300 mt-1">
+            {doneEvent.summary.created} créé{doneEvent.summary.created > 1 ? 's' : ''}
+            {doneEvent.summary.skipped > 0 && ` — ${doneEvent.summary.skipped} déjà existant${doneEvent.summary.skipped > 1 ? 's' : ''} (ignorés)`}
+            {doneEvent.summary.errors > 0 && ` — ${doneEvent.summary.errors} erreur${doneEvent.summary.errors > 1 ? 's' : ''}`}
+          </p>
+        </div>
+      )}
+      {!done && !lastProgress && <p className="text-gray-400 text-sm">Démarrage…</p>}
+    </div>
+  )
+}

src/components/creation/MetafieldResolver.tsx

@@ -0,0 +1,219 @@
+'use client'
+import { useState, useEffect, useRef } from 'react'
+import type { MetafieldDefinition, MetafieldResolution } from '@/types/creation'
+import { normalizeMetafieldKey } from '@/lib/shopifyMetafields'
+
+interface Props {
+  specificColumns: string[]
+  onResolved: (resolutions: MetafieldResolution[]) => void
+}
+
+export function MetafieldResolver({ specificColumns, onResolved }: Props) {
+  const [definitions, setDefinitions] = useState<MetafieldDefinition[]>([])
+  const [matched, setMatched] = useState<Record<string, MetafieldResolution>>({})
+  const [unmatched, setUnmatched] = useState<string[]>([])
+  const [resolutions, setResolutions] = useState<Record<string, MetafieldResolution>>({})
+  const [loading, setLoading] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+  const [searches, setSearches] = useState<Record<string, string>>({})
+  const [openDropdown, setOpenDropdown] = useState<string | null>(null)
+  const dropdownRef = useRef<HTMLDivElement>(null)
+  const saveTimeoutRef = useRef<ReturnType<typeof setTimeout> | null>(null)
+
+  useEffect(() => {
+    if (specificColumns.length === 0) { setLoading(false); onResolved([]); return }
+    const params = specificColumns.map(c => encodeURIComponent(c)).join(',')
+    Promise.all([
+      fetch(`/api/creation/metafields?columns=${params}`).then(r => r.json()),
+      fetch('/api/creation/resolutions').then(r => r.json()),
+    ])
+      .then(([data, cache]: [{ error?: string; definitions: MetafieldDefinition[]; matched: Record<string, MetafieldResolution>; unmatched: string[] }, Record<string, MetafieldResolution>]) => {
+        if (data.error) throw new Error(data.error)
+        setDefinitions(data.definitions)
+        setMatched(data.matched)
+        setUnmatched(data.unmatched)
+        const init: Record<string, MetafieldResolution> = { ...data.matched }
+        data.unmatched.forEach((col: string) => {
+          // Utilise le cache persisté si disponible, sinon 'skip' par défaut
+          init[col] = cache[col] ?? { columnHeader: col, action: 'skip', namespace: 'custom', key: normalizeMetafieldKey(col) }
+        })
+        setResolutions(init)
+      })
+      .catch(e => setError((e as Error).message))
+      .finally(() => setLoading(false))
+  // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [specificColumns.join(',')])
+
+  useEffect(() => {
+    if (!loading) onResolved(Object.values(resolutions))
+  // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [resolutions, loading])
+
+  const updateResolution = (col: string, partial: Partial<MetafieldResolution>) => {
+    setResolutions(prev => {
+      const next = { ...prev, [col]: { ...prev[col], ...partial } }
+      // Sauvegarde en différé pour éviter un appel par frappe
+      if (saveTimeoutRef.current) clearTimeout(saveTimeoutRef.current)
+      saveTimeoutRef.current = setTimeout(() => {
+        fetch('/api/creation/resolutions', {
+          method: 'PUT',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify(next),
+        }).catch(() => null)
+      }, 800)
+      return next
+    })
+  }
+
+  const filteredDefs = (col: string) => {
+    const q = (searches[col] ?? '').toLowerCase()
+    if (!q) return definitions
+    return definitions.filter(d =>
+      d.name.toLowerCase().includes(q) ||
+      d.key.toLowerCase().includes(q) ||
+      d.namespace.toLowerCase().includes(q)
+    )
+  }
+
+  if (loading) return <p className="text-gray-400 text-sm">Analyse des métachamps Shopify…</p>
+  if (error) return <p className="text-red-400 text-sm">{error}</p>
+  if (specificColumns.length === 0) return <p className="text-gray-400 text-sm">Aucune colonne spécifique détectée.</p>
+
+  return (
+    <div className="space-y-4">
+      {Object.entries(matched).length > 0 && (
+        <div>
+          <h3 className="text-sm font-medium text-green-400 mb-2">
+            ✓ {Object.entries(matched).length} colonne{Object.entries(matched).length > 1 ? 's' : ''} avec correspondance automatique
+          </h3>
+          <div className="space-y-1">
+            {Object.entries(matched).map(([col, res]) => (
+              <div key={col} className="flex items-center gap-3 px-3 py-2 bg-slate-700/50 rounded text-sm">
+                <span className="text-gray-300 flex-1">{col}</span>
+                <span className="text-green-400 text-xs">→ {res.namespace}.{res.key}</span>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+      {unmatched.length > 0 && (
+        <div>
+          <div className="mb-3 p-3 bg-slate-700/50 rounded-lg border border-slate-600">
+            <p className="text-xs text-gray-400">
+              Ces colonnes n&apos;ont pas de métachamp correspondant dans Shopify.
+              Choisissez pour chacune : <span className="text-indigo-300 font-medium">Créer nouveau</span> (nouveau métachamp Shopify),
+              <span className="text-blue-300 font-medium"> Associer</span> (utiliser un existant), ou
+              <span className="text-gray-300 font-medium"> Ignorer</span> (ne pas synchroniser).
+            </p>
+          </div>
+          <div className="space-y-2">
+            {unmatched.map(col => {
+              const res = resolutions[col]
+              if (!res) return null
+              return (
+                <div key={col} className={`p-3 rounded-lg space-y-2 border ${res.action === 'skip' ? 'bg-slate-700/40 border-slate-700' : res.action === 'create' ? 'bg-indigo-900/20 border-indigo-700/50' : 'bg-blue-900/20 border-blue-700/50'}`}>
+                  <div className="flex items-center justify-between">
+                    <p className="text-sm text-white font-medium">{col}</p>
+                    {res.action === 'create' && <span className="text-xs text-indigo-300">✓ Sera créé dans Shopify</span>}
+                    {res.action === 'map' && <span className="text-xs text-blue-300">✓ Associé à un existant</span>}
+                    {res.action === 'skip' && <span className="text-xs text-gray-500">— Ignoré</span>}
+                  </div>
+                  <div className="flex gap-2">
+                    {(['create', 'map', 'skip'] as const).map(action => (
+                      <button
+                        key={action}
+                        type="button"
+                        onClick={() => updateResolution(col, { action })}
+                        className={`px-3 py-1 rounded text-xs font-medium transition-colors ${
+                          res.action === action
+                            ? action === 'create' ? 'bg-indigo-600 text-white'
+                              : action === 'map' ? 'bg-blue-600 text-white'
+                              : 'bg-slate-500 text-white'
+                            : 'bg-slate-600 text-gray-400 hover:bg-slate-500 hover:text-gray-200'
+                        }`}
+                      >
+                        {action === 'create' ? '+ Créer nouveau' : action === 'map' ? '↔ Associer existant' : '✕ Ignorer'}
+                      </button>
+                    ))}
+                  </div>
+                  {res.action === 'create' && (
+                    <div className="flex gap-2 mt-1">
+                      <div className="flex-1">
+                        <label className="block text-xs text-gray-400 mb-1">Clé Shopify</label>
+                        <input
+                          type="text"
+                          value={res.key}
+                          onChange={e => updateResolution(col, { key: e.target.value })}
+                          placeholder="ex: puissance"
+                          className="w-full bg-slate-600 border border-slate-500 rounded px-2 py-1 text-xs text-white focus:outline-none focus:ring-1 focus:ring-indigo-500"
+                        />
+                      </div>
+                      <div className="w-28">
+                        <label className="block text-xs text-gray-400 mb-1">Namespace</label>
+                        <input
+                          type="text"
+                          value={res.namespace}
+                          onChange={e => updateResolution(col, { namespace: e.target.value })}
+                          placeholder="custom"
+                          className="w-full bg-slate-600 border border-slate-500 rounded px-2 py-1 text-xs text-white focus:outline-none focus:ring-1 focus:ring-indigo-500"
+                        />
+                      </div>
+                    </div>
+                  )}
+                  {res.action === 'map' && (
+                    <div className="relative" ref={openDropdown === col ? dropdownRef : undefined}>
+                      <label className="block text-xs text-gray-400 mb-1">Métachamp existant</label>
+                      {res.existingDefinitionId ? (
+                        <div className="flex items-center gap-2">
+                          <span className="flex-1 text-xs text-blue-300 bg-slate-600 border border-slate-500 rounded px-2 py-1 truncate">
+                            {definitions.find(d => d.id === res.existingDefinitionId)?.name ?? res.key} ({res.namespace}.{res.key})
+                          </span>
+                          <button type="button" onClick={() => { updateResolution(col, { existingDefinitionId: undefined, key: normalizeMetafieldKey(col), namespace: 'custom' }); setSearches(p => ({ ...p, [col]: '' })); setOpenDropdown(col) }} className="text-xs text-gray-400 hover:text-white px-1">✕</button>
+                        </div>
+                      ) : (
+                        <div>
+                          <input
+                            type="text"
+                            autoFocus
+                            value={searches[col] ?? ''}
+                            onChange={e => { setSearches(p => ({ ...p, [col]: e.target.value })); setOpenDropdown(col) }}
+                            onFocus={() => setOpenDropdown(col)}
+                            placeholder="Rechercher un métachamp…"
+                            className="w-full bg-slate-600 border border-slate-500 rounded px-2 py-1 text-xs text-white focus:outline-none focus:ring-1 focus:ring-blue-500"
+                          />
+                          {openDropdown === col && (
+                            <div className="absolute z-10 mt-1 w-full bg-slate-700 border border-slate-600 rounded shadow-lg max-h-48 overflow-y-auto">
+                              {filteredDefs(col).length === 0 ? (
+                                <p className="text-xs text-gray-400 px-3 py-2">Aucun résultat</p>
+                              ) : filteredDefs(col).map(d => (
+                                <button
+                                  key={d.id}
+                                  type="button"
+                                  onMouseDown={() => { updateResolution(col, { existingDefinitionId: d.id, key: d.key, namespace: d.namespace, type: d.type }); setOpenDropdown(null) }}
+                                  className="w-full text-left px-3 py-1.5 text-xs text-white hover:bg-slate-600 flex justify-between gap-2"
+                                >
+                                  <span>{d.name}</span>
+                                  <span className="text-gray-400 shrink-0">{d.namespace}.{d.key}</span>
+                                </button>
+                              ))}
+                            </div>
+                          )}
+                        </div>
+                      )}
+                    </div>
+                  )}
+                </div>
+              )
+            })}
+          </div>
+          {/* Résumé des actions */}
+          <div className="mt-3 flex gap-4 text-xs text-gray-400">
+            <span className="text-indigo-300 font-medium">{Object.values(resolutions).filter(r => r.action === 'create').length} à créer</span>
+            <span className="text-blue-300 font-medium">{Object.values(resolutions).filter(r => r.action === 'map').length} à associer</span>
+            <span>{Object.values(resolutions).filter(r => r.action === 'skip').length} ignorés</span>
+          </div>
+        </div>
+      )}
+    </div>
+  )
+}

src/components/creation/PendingRowsTable.tsx

@@ -0,0 +1,54 @@
+'use client'
+import type { PendingProduct } from '@/types/creation'
+
+interface Props {
+  byTab: Record<string, PendingProduct[]>
+  total: number
+}
+
+export function PendingRowsTable({ byTab, total }: Props) {
+  if (total === 0) {
+    return (
+      <div className="text-center py-12 text-gray-400 text-sm">
+        Aucun produit en attente (Publié=1 et ID vide).
+      </div>
+    )
+  }
+  return (
+    <div className="space-y-6">
+      {Object.entries(byTab).map(([tab, products]) => (
+        <div key={tab}>
+          <h3 className="text-sm font-semibold text-indigo-300 mb-2 uppercase tracking-wide">
+            {tab} — {products.length} produit{products.length > 1 ? 's' : ''}
+          </h3>
+          <div className="overflow-x-auto">
+            <table className="w-full text-sm">
+              <thead>
+                <tr className="text-left text-gray-400 border-b border-slate-700">
+                  <th className="pb-2 pr-4 font-medium">SKU</th>
+                  <th className="pb-2 pr-4 font-medium">Titre</th>
+                  <th className="pb-2 pr-4 font-medium">Prix</th>
+                  <th className="pb-2 pr-4 font-medium">Stock</th>
+                  <th className="pb-2 font-medium">Métachamps</th>
+                </tr>
+              </thead>
+              <tbody>
+                {products.map((p) => (
+                  <tr key={`${p.tab}-${p.rowNumber}`} className="border-b border-slate-700/50">
+                    <td className="py-2 pr-4 font-mono text-indigo-300 text-xs">{p.sku}</td>
+                    <td className="py-2 pr-4 text-white">{p.title}</td>
+                    <td className="py-2 pr-4 text-gray-300">{p.priceActual} €</td>
+                    <td className="py-2 pr-4 text-gray-300">{p.stock}</td>
+                    <td className="py-2 text-gray-400 text-xs">
+                      {Object.keys(p.specificFields).length} champ{Object.keys(p.specificFields).length > 1 ? 's' : ''}
+                    </td>
+                  </tr>
+                ))}
+              </tbody>
+            </table>
+          </div>
+        </div>
+      ))}
+    </div>
+  )
+}

src/components/images/DropZone.tsx

@@ -0,0 +1,73 @@
+'use client'
+import { useCallback, useRef, useState } from 'react'
+
+interface DropZoneProps {
+  onFiles: (files: File[]) => void
+  disabled?: boolean
+}
+
+const ACCEPTED_TYPES = ['.heic', '.heif', '.jpg', '.jpeg', '.png', '.zip']
+const ACCEPT_ATTR = ACCEPTED_TYPES.join(',')
+
+export function DropZone({ onFiles, disabled = false }: DropZoneProps) {
+  const [isDragging, setIsDragging] = useState(false)
+  const inputRef = useRef<HTMLInputElement>(null)
+
+  const handleFiles = useCallback(
+    (fileList: FileList | null) => {
+      if (!fileList) return
+      const files = Array.from(fileList).filter((f) => {
+        const ext = '.' + f.name.split('.').pop()?.toLowerCase()
+        return ACCEPTED_TYPES.includes(ext)
+      })
+      if (files.length > 0) onFiles(files)
+    },
+    [onFiles],
+  )
+
+  const onDragOver = (e: React.DragEvent) => {
+    e.preventDefault()
+    if (!disabled) setIsDragging(true)
+  }
+
+  const onDragLeave = () => setIsDragging(false)
+
+  const onDrop = (e: React.DragEvent) => {
+    e.preventDefault()
+    setIsDragging(false)
+    if (!disabled) handleFiles(e.dataTransfer.files)
+  }
+
+  return (
+    <div
+      onDragOver={onDragOver}
+      onDragLeave={onDragLeave}
+      onDrop={onDrop}
+      onClick={() => !disabled && inputRef.current?.click()}
+      className={`border-2 border-dashed rounded-xl p-8 text-center cursor-pointer transition-colors ${
+        isDragging
+          ? 'border-indigo-400 bg-indigo-950/30'
+          : disabled
+            ? 'border-slate-700 bg-slate-800/20 cursor-not-allowed'
+            : 'border-slate-600 bg-slate-800/10 hover:border-indigo-500 hover:bg-indigo-950/20'
+      }`}
+    >
+      <div className="text-3xl mb-2">🖼️</div>
+      <p className="text-sm font-semibold text-slate-300">
+        Déposez vos images ici ou cliquez pour parcourir
+      </p>
+      <p className="text-xs text-slate-500 mt-1">
+        HEIC, JPG, PNG, ZIP — le nom du fichier = référence produit
+      </p>
+      <input
+        ref={inputRef}
+        type="file"
+        multiple
+        accept={ACCEPT_ATTR}
+        className="hidden"
+        onChange={(e) => handleFiles(e.target.files)}
+        disabled={disabled}
+      />
+    </div>
+  )
+}

src/components/images/GlobalActions.tsx

@@ -0,0 +1,37 @@
+'use client'
+import type { ImageItem } from '@/types/images'
+
+interface GlobalActionsProps {
+  items: ImageItem[]
+  onUploadAll: () => void
+}
+
+export function GlobalActions({ items, onUploadAll }: GlobalActionsProps) {
+  if (items.length === 0) return null
+
+  const ready     = items.filter((i) => i.status === 'ready').length
+  const processing = items.filter((i) => ['pending', 'converting', 'processing', 'searching', 'uploading'].includes(i.status)).length
+  const notFound  = items.filter((i) => i.status === 'not_found').length
+  const uploaded  = items.filter((i) => i.status === 'uploaded').length
+  const errors    = items.filter((i) => i.status === 'error').length
+
+  return (
+    <div className="bg-slate-900 border border-slate-700 rounded-xl px-4 py-3 flex items-center gap-6 flex-wrap">
+      <div className="flex gap-4 text-xs text-slate-400 flex-1 flex-wrap">
+        {processing > 0 && <span>⏳ {processing} en traitement</span>}
+        {ready      > 0 && <span className="text-green-400 font-semibold">✓ {ready} prêtes</span>}
+        {notFound   > 0 && <span className="text-red-400">❌ {notFound} introuvables</span>}
+        {errors     > 0 && <span className="text-red-400">⚠️ {errors} erreurs</span>}
+        {uploaded   > 0 && <span className="text-slate-500">✅ {uploaded} uploadées</span>}
+      </div>
+      {ready > 0 && (
+        <button
+          onClick={onUploadAll}
+          className="bg-indigo-600 hover:bg-indigo-500 text-white text-sm font-semibold px-4 py-2 rounded-lg transition-colors"
+        >
+          ⬆️ Tout uploader ({ready})
+        </button>
+      )}
+    </div>
+  )
+}

src/components/images/ImageCard.tsx

@@ -0,0 +1,272 @@
+'use client'
+import { useEffect, useState } from 'react'
+import type { ImageItem } from '@/types/images'
+
+interface ImageCardProps {
+  item: ImageItem
+  selected?: boolean
+  onSelect?: (id: string, selected: boolean) => void
+  onFeatherChange: (id: string, value: number) => void
+  onAlphaThresholdChange: (id: string, value: number) => void
+  onRotate: (id: string, direction: 'cw' | 'ccw') => void
+  onUpload: (id: string) => void
+  onRemove: (id: string) => void
+  onOpenLightbox: (item: ImageItem) => void
+  onAssignProduct: (id: string, shopifyProductId: string, shopifyProductTitle: string) => void
+  onReprocess: (id: string) => void
+  onDetour: (id: string) => void
+  onMockup: (id: string) => void
+}
+
+const STATUS_LABELS: Record<string, { label: string; color: string }> = {
+  pending:    { label: '⏳ En attente',         color: 'text-slate-400' },
+  converting: { label: '🔄 Conversion HEIC',    color: 'text-yellow-400' },
+  searching:  { label: '🔍 Recherche…',         color: 'text-purple-400' },
+  converted:  { label: '✓ Prêt (sans détourage)', color: 'text-amber-400' },
+  processing: { label: '🤖 Détourage IA',       color: 'text-blue-400' },
+  ready:      { label: '✓ Détouré',             color: 'text-green-400' },
+  uploading:  { label: '⬆️ Upload…',            color: 'text-blue-400' },
+  uploaded:   { label: '✅ Uploadé',            color: 'text-green-500' },
+  skipped:    { label: '⏭️ Déjà sur Shopify',   color: 'text-slate-400' },
+  not_found:  { label: '❌ Réf. introuvable',   color: 'text-red-400' },
+  error:      { label: '❌ Erreur',              color: 'text-red-400' },
+}
+
+function BlobThumbnail({ blob, alt }: { blob: Blob; alt: string }) {
+  const [url, setUrl] = useState<string | null>(null)
+
+  useEffect(() => {
+    const objectUrl = URL.createObjectURL(blob)
+    setUrl(objectUrl)
+    return () => URL.revokeObjectURL(objectUrl)
+  }, [blob])
+
+  if (!url) return <div className="w-full h-full bg-slate-700 animate-pulse" />
+  return <img src={url} alt={alt} className="w-full h-full object-contain" />
+}
+
+function ProductSearch({ itemId, onAssign }: { itemId: string; onAssign: (id: string, shopifyProductId: string, title: string) => void }) {
+  const [query, setQuery] = useState('')
+  const [results, setResults] = useState<{ shopifyId: string; title: string }[]>([])
+  const [loading, setLoading] = useState(false)
+
+  async function search() {
+    if (!query.trim()) return
+    setLoading(true)
+    try {
+      const res = await fetch(`/api/products/search?ref=${encodeURIComponent(query.trim())}`)
+      const data = await res.json()
+      if (data.found) setResults([{ shopifyId: data.shopifyId, title: data.title }])
+      else setResults([])
+    } finally {
+      setLoading(false)
+    }
+  }
+
+  return (
+    <div className="flex flex-col gap-1.5 mt-1">
+      <div className="flex gap-1">
+        <input
+          type="text"
+          value={query}
+          onChange={(e) => setQuery(e.target.value)}
+          onKeyDown={(e) => e.key === 'Enter' && search()}
+          placeholder="Rechercher un produit…"
+          className="flex-1 px-2 py-1 text-xs bg-slate-800 border border-slate-600 rounded text-slate-200 placeholder-slate-500 focus:outline-none focus:border-indigo-500"
+        />
+        <button
+          onClick={search}
+          disabled={loading}
+          className="px-2 py-1 text-xs bg-slate-700 hover:bg-slate-600 rounded text-slate-300 disabled:opacity-50"
+        >
+          {loading ? '…' : '🔍'}
+        </button>
+      </div>
+      {results.length === 0 && !loading && query && (
+        <p className="text-xs text-slate-500">Aucun résultat</p>
+      )}
+      {results.map((r) => (
+        <button
+          key={r.shopifyId}
+          onClick={() => onAssign(itemId, r.shopifyId, r.title)}
+          className="text-left px-2 py-1.5 text-xs bg-slate-800 hover:bg-indigo-900 border border-slate-600 hover:border-indigo-500 rounded text-slate-200 truncate"
+        >
+          {r.title}
+        </button>
+      ))}
+    </div>
+  )
+}
+
+export function ImageCard({
+  item,
+  selected = false,
+  onSelect,
+  onFeatherChange,
+  onAlphaThresholdChange,
+  onRotate,
+  onUpload,
+  onRemove,
+  onOpenLightbox,
+  onAssignProduct,
+  onReprocess,
+  onDetour,
+  onMockup,
+}: ImageCardProps) {
+  const statusInfo = STATUS_LABELS[item.status] ?? { label: item.status, color: 'text-slate-400' }
+  const isProcessing = ['pending', 'converting', 'processing', 'searching', 'uploading'].includes(item.status)
+  const canAdjust = !!item.rawPngBlob && !isProcessing
+  const canUpload = (item.status === 'ready' || item.status === 'converted') && !!item.shopifyProductId
+  const canDetour = (item.status === 'converted' || item.status === 'error' || item.status === 'not_found') && !isProcessing
+
+  return (
+    <div className={`bg-slate-900 border rounded-xl overflow-hidden flex flex-col ${selected ? 'border-indigo-500 ring-1 ring-indigo-500' : 'border-slate-700'}`}>
+      {/* Miniatures avant / après */}
+      <div
+        className="relative h-40 bg-slate-800 cursor-pointer"
+        onClick={() => onOpenLightbox(item)}
+      >
+        {onSelect && (
+          <div className="absolute top-2 left-2 z-10" onClick={e => e.stopPropagation()}>
+            <input
+              type="checkbox"
+              checked={selected}
+              onChange={e => onSelect(item.id, e.target.checked)}
+              className="w-4 h-4 accent-indigo-500 cursor-pointer"
+            />
+          </div>
+        )}
+        <div className={`absolute top-0 bottom-0 left-0 overflow-hidden ${item.processedBlob ? 'w-1/2' : 'w-full'}`}>
+          <BlobThumbnail blob={item.originalBlob} alt="Original" />
+        </div>
+        {item.processedBlob && (
+          <div className="absolute top-0 bottom-0 right-0 w-1/2 overflow-hidden border-l-2 border-indigo-500">
+            <BlobThumbnail blob={item.processedBlob} alt="Traité" />
+          </div>
+        )}
+        {/* Barre de progression pendant l'IA */}
+        {item.status === 'processing' && item.progress && (
+          <div className="absolute bottom-0 inset-x-0 bg-black/60 px-2 py-1">
+            <div className="h-1 bg-slate-700 rounded">
+              <div
+                className="h-1 bg-indigo-500 rounded transition-all"
+                style={{ width: `${item.progress.percent}%` }}
+              />
+            </div>
+            <p className="text-xs text-slate-400 mt-0.5">{item.progress.key} — {item.progress.percent}%</p>
+          </div>
+        )}
+      </div>
+
+      {/* Infos */}
+      <div className="p-3 flex flex-col gap-2 flex-1">
+        <div>
+          <p className="text-xs font-mono text-slate-300 truncate" title={item.filename}>{item.filename}</p>
+          <p className="text-xs text-slate-500 truncate">Réf : {item.ref}</p>
+          {item.shopifyProductTitle && (
+            <p className="text-xs text-slate-500 truncate">{item.shopifyProductTitle}</p>
+          )}
+          <p className={`text-xs font-semibold mt-0.5 ${statusInfo.color}`}>{statusInfo.label}</p>
+          {item.error && <p className="text-xs text-red-400 mt-0.5 truncate" title={item.error}>{item.error}</p>}
+        </div>
+
+        {item.status === 'not_found' && (
+          <ProductSearch itemId={item.id} onAssign={onAssignProduct} />
+        )}
+
+        {/* Contrôles feather + tolérance + rotation */}
+        <div className={canAdjust ? '' : 'opacity-40 pointer-events-none'}>
+          <label className="block text-xs text-slate-500 mb-1">
+            Bords : {item.feather} px
+          </label>
+          <input
+            type="range"
+            min={0}
+            max={5}
+            step={1}
+            value={item.feather}
+            onChange={(e) => onFeatherChange(item.id, Number(e.target.value))}
+            className="w-full accent-indigo-500"
+          />
+
+          <label className="block text-xs text-slate-500 mb-1 mt-2">
+            Tolérance verre : {item.alphaThreshold}
+          </label>
+          <input
+            type="range"
+            min={0}
+            max={100}
+            step={5}
+            value={item.alphaThreshold}
+            onChange={(e) => onAlphaThresholdChange(item.id, Number(e.target.value))}
+            className="w-full accent-amber-500"
+          />
+
+          <div className="flex gap-1 mt-2">
+            <button
+              onClick={() => onRotate(item.id, 'ccw')}
+              className="flex-1 py-1 text-xs bg-slate-800 hover:bg-slate-700 rounded text-slate-300"
+            >↺ -90°</button>
+            <button
+              onClick={() => onRotate(item.id, 'cw')}
+              className="flex-1 py-1 text-xs bg-slate-800 hover:bg-slate-700 rounded text-slate-300"
+            >↻ +90°</button>
+          </div>
+        </div>
+
+        {/* Boutons d'action */}
+        <div className="flex gap-2 mt-auto pt-1">
+          {canUpload && (
+            <button
+              onClick={() => onUpload(item.id)}
+              className="flex-1 py-1.5 text-xs bg-indigo-600 hover:bg-indigo-500 text-white font-semibold rounded"
+            >
+              ⬆️ Uploader
+            </button>
+          )}
+          {canDetour && (
+            <button
+              onClick={() => onDetour(item.id)}
+              title="Lancer le détourage IA"
+              className="flex-1 py-1.5 text-xs bg-purple-700 hover:bg-purple-600 text-white font-semibold rounded"
+            >
+              ✂️ Détourer
+            </button>
+          )}
+          {(item.status === 'ready' || item.status === 'uploaded' || item.status === 'skipped' || item.status === 'converted') && (
+            <button
+              onClick={() => onMockup(item.id)}
+              title="Créer un mockup"
+              className="py-1.5 px-2 text-xs bg-slate-800 hover:bg-teal-900 text-slate-400 hover:text-teal-300 rounded"
+            >
+              🖼️
+            </button>
+          )}
+          {(item.status === 'ready' || item.status === 'uploaded' || item.status === 'skipped' || item.status === 'error') && item.rawPngBlob && (
+            <button
+              onClick={() => onReprocess(item.id)}
+              title="Relancer le détourage IA"
+              className="py-1.5 px-2 text-xs bg-slate-800 hover:bg-amber-900 text-slate-400 hover:text-amber-300 rounded"
+            >
+              🔄
+            </button>
+          )}
+          {item.status === 'uploaded' && item.uploadedUrl && (
+            <a
+              href={item.uploadedUrl}
+              target="_blank"
+              rel="noopener noreferrer"
+              className="flex-1 py-1.5 text-xs bg-green-800 hover:bg-green-700 text-white font-semibold rounded text-center"
+            >
+              Voir sur Shopify →
+            </a>
+          )}
+          <button
+            onClick={() => onRemove(item.id)}
+            className="py-1.5 px-2 text-xs bg-slate-800 hover:bg-red-900 text-slate-400 hover:text-red-300 rounded"
+          >✕</button>
+        </div>
+      </div>
+    </div>
+  )
+}

src/components/images/Lightbox.tsx

@@ -0,0 +1,70 @@
+'use client'
+import { useEffect, useState } from 'react'
+import type { ImageItem } from '@/types/images'
+
+interface LightboxProps {
+  item: ImageItem | null
+  onClose: () => void
+}
+
+function BlobImg({ blob, alt }: { blob: Blob; alt: string }) {
+  const [url, setUrl] = useState<string | null>(null)
+
+  useEffect(() => {
+    const u = URL.createObjectURL(blob)
+    setUrl(u)
+    return () => URL.revokeObjectURL(u)
+  }, [blob])
+
+  if (!url) return null
+  return <img src={url} alt={alt} className="max-h-full max-w-full object-contain" />
+}
+
+export function Lightbox({ item, onClose }: LightboxProps) {
+  useEffect(() => {
+    const onKey = (e: KeyboardEvent) => { if (e.key === 'Escape') onClose() }
+    document.addEventListener('keydown', onKey)
+    return () => document.removeEventListener('keydown', onKey)
+  }, [onClose])
+
+  if (!item) return null
+
+  return (
+    <div
+      className="fixed inset-0 z-50 bg-black/90 flex items-center justify-center p-4"
+      onClick={onClose}
+    >
+      <div
+        className="bg-slate-900 rounded-xl max-w-5xl w-full max-h-[90vh] overflow-hidden flex flex-col"
+        onClick={(e) => e.stopPropagation()}
+      >
+        <div className="flex items-center justify-between px-4 py-3 border-b border-slate-700">
+          <div>
+            <span className="text-sm font-mono text-slate-300">{item.ref}</span>
+            {item.shopifyProductTitle && (
+              <span className="text-xs text-slate-500 ml-2">{item.shopifyProductTitle}</span>
+            )}
+          </div>
+          <button
+            onClick={onClose}
+            className="text-slate-400 hover:text-white text-xl leading-none"
+          >✕</button>
+        </div>
+
+        <div className="flex flex-1 overflow-hidden min-h-0">
+          <div className="flex-1 flex flex-col items-center justify-center p-4 bg-slate-950 border-r border-slate-700">
+            <p className="text-xs text-slate-500 mb-2">Avant</p>
+            <BlobImg blob={item.originalBlob} alt="Avant" />
+          </div>
+          <div className="flex-1 flex flex-col items-center justify-center p-4 bg-white/5">
+            <p className="text-xs text-slate-500 mb-2">Après</p>
+            {item.processedBlob
+              ? <BlobImg blob={item.processedBlob} alt="Après" />
+              : <p className="text-slate-600 text-sm">Traitement en cours…</p>
+            }
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}

src/components/layout/Sidebar.tsx

@@ -15,6 +15,9 @@ const NAV_ITEMS: NavItem[] = [
   { href: '/produits',   label: 'Produits',     icon: '📦' },
   { href: '/images',     label: 'Images',       icon: '🖼️' },
   { href: '/sync',       label: 'Sync Sheets',  icon: '🔄' },
+  { href: '/creation',   label: 'Création',     icon: '✨' },
+  { href: '/mockup',     label: 'Mockups',      icon: '🖼️' },
+  { href: '/bannieres',  label: 'Bannières',    icon: '🎨' },
   { href: '/parametres', label: 'Paramètres',   icon: '⚙️', adminOnly: true },
 ]
 

src/components/mockup/MockupGenerator.tsx

@@ -0,0 +1,170 @@
+'use client'
+import { useState, useEffect } from 'react'
+import type { MockupTemplate } from '@/types/mockup'
+
+interface Props {
+  productCutoutBase64: string
+  productName: string
+  shopifyId?: string
+  family: string
+  dimensions?: string
+  onUploaded?: (url: string) => void
+}
+
+export function MockupGenerator({ productCutoutBase64, productName, shopifyId, family, dimensions, onUploaded }: Props) {
+  const [templates, setTemplates] = useState<MockupTemplate[]>([])
+  const [selectedTemplate, setSelectedTemplate] = useState<string | null>(null)
+  const [instruction, setInstruction] = useState('')
+  const [generating, setGenerating] = useState(false)
+  const [resultB64, setResultB64] = useState<string | null>(null)
+  const [uploading, setUploading] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+  const [uploadedUrl, setUploadedUrl] = useState<string | null>(null)
+
+  useEffect(() => {
+    fetch('/api/mockup/templates')
+      .then(r => r.json())
+      .then((data: MockupTemplate[]) => {
+        const filtered = data.filter(t => !family || t.family === family || t.family === 'Tous')
+        setTemplates(filtered.length > 0 ? filtered : data)
+      })
+  }, [family])
+
+  const generate = async () => {
+    if (!selectedTemplate) return
+    setGenerating(true)
+    setError(null)
+    setResultB64(null)
+    try {
+      const res = await fetch('/api/mockup/generate', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          templateId: selectedTemplate,
+          productImageBase64: productCutoutBase64,
+          productName,
+          family,
+          dimensions: dimensions || undefined,
+          instruction: instruction || undefined,
+        }),
+      })
+      const data = await res.json()
+      if (!res.ok) throw new Error(data.error)
+      setResultB64(data.imageBase64)
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Erreur')
+    } finally {
+      setGenerating(false)
+    }
+  }
+
+  const upload = async () => {
+    if (!resultB64 || !shopifyId) return
+    setUploading(true)
+    try {
+      const filename = `${productName.toLowerCase().replace(/\s+/g, '-')}-mockup.jpg`
+      const res = await fetch('/api/images/upload', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ shopifyProductId: shopifyId, imageBase64: resultB64, filename }),
+      })
+      const data = await res.json()
+      if (!res.ok) throw new Error(data.error)
+      setUploadedUrl(data.url)
+      onUploaded?.(data.url)
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Erreur upload')
+    } finally {
+      setUploading(false)
+    }
+  }
+
+  return (
+    <div className="space-y-4">
+      <div>
+        <label className="block text-xs text-gray-400 mb-2">Template de mise en ambiance</label>
+        {templates.length === 0 ? (
+          <p className="text-xs text-gray-500">Aucun template disponible — ajoutez-en dans la bibliothèque.</p>
+        ) : (
+          <div className="grid grid-cols-2 gap-2">
+            {templates.map(t => (
+              <button
+                key={t.id}
+                type="button"
+                onClick={() => setSelectedTemplate(t.id)}
+                className={`relative rounded-lg overflow-hidden border-2 transition-all ${selectedTemplate === t.id ? 'border-indigo-500' : 'border-slate-600 hover:border-slate-400'}`}
+              >
+                <img
+                  src={`/api/mockup/templates/image/${t.filename}`}
+                  alt={t.name}
+                  className="w-full h-24 object-cover"
+                />
+                <div className="absolute bottom-0 left-0 right-0 bg-black/60 px-2 py-1">
+                  <p className="text-xs text-white truncate">{t.name}</p>
+                </div>
+              </button>
+            ))}
+          </div>
+        )}
+      </div>
+
+      {dimensions ? (
+        <p className="text-xs text-green-400">Dimensions : {dimensions}</p>
+      ) : (
+        <p className="text-xs text-amber-400">Dimensions non renseignées — le mockup peut ne pas être à l&apos;échelle.</p>
+      )}
+
+      <button
+        type="button"
+        onClick={generate}
+        disabled={!selectedTemplate || generating}
+        className="w-full py-2 px-4 rounded-lg bg-indigo-600 text-white text-sm font-medium disabled:opacity-40 hover:bg-indigo-500 transition-colors"
+      >
+        {generating ? 'Génération en cours…' : 'Générer le mockup'}
+      </button>
+
+      {error && <p className="text-xs text-red-400">{error}</p>}
+
+      {resultB64 && (
+        <div className="space-y-3">
+          <img
+            src={`data:image/jpeg;base64,${resultB64}`}
+            alt="Mockup généré"
+            className="w-full rounded-lg border border-slate-600"
+          />
+
+          <div className="flex gap-2">
+            <input
+              type="text"
+              value={instruction}
+              onChange={e => setInstruction(e.target.value)}
+              placeholder="Instruction supplémentaire (optionnel)…"
+              className="flex-1 bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-xs text-white focus:outline-none focus:ring-1 focus:ring-indigo-500"
+            />
+            <button
+              type="button"
+              onClick={generate}
+              disabled={generating}
+              className="px-3 py-1.5 rounded bg-slate-600 text-xs text-white hover:bg-slate-500 disabled:opacity-40"
+            >
+              {generating ? '…' : '↺ Regénérer'}
+            </button>
+          </div>
+
+          {uploadedUrl ? (
+            <p className="text-xs text-green-400">✓ Uploadé sur Shopify</p>
+          ) : (
+            <button
+              type="button"
+              onClick={upload}
+              disabled={uploading || !shopifyId}
+              className="w-full py-2 px-4 rounded-lg bg-emerald-600 text-white text-sm font-medium disabled:opacity-40 hover:bg-emerald-500 transition-colors"
+            >
+              {uploading ? 'Upload…' : shopifyId ? '↑ Uploader sur Shopify' : 'Produit Shopify requis pour uploader'}
+            </button>
+          )}
+        </div>
+      )}
+    </div>
+  )
+}

src/components/mockup/MockupModal.tsx

@@ -0,0 +1,348 @@
+'use client'
+import { useState, useEffect, useRef } from 'react'
+import type { CatalogProduct } from '@/types/products'
+import type { MockupTemplate } from '@/types/mockup'
+
+interface Props {
+  product: CatalogProduct
+  onClose: () => void
+}
+
+interface Metafield {
+  namespace: string
+  key: string
+  value: string
+  type: string
+}
+
+async function urlToBase64(url: string): Promise<string> {
+  const res = await fetch(`/api/images/proxy?url=${encodeURIComponent(url)}`)
+  if (!res.ok) throw new Error('Impossible de charger l\'image')
+  const blob = await res.blob()
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader()
+    reader.onload = () => resolve((reader.result as string).split(',')[1])
+    reader.onerror = reject
+    reader.readAsDataURL(blob)
+  })
+}
+
+export function MockupModal({ product, onClose }: Props) {
+  const [templates, setTemplates] = useState<MockupTemplate[]>([])
+  const [families, setFamilies] = useState<string[]>([])
+  const [metafields, setMetafields] = useState<Metafield[]>([])
+  const [loadingMeta, setLoadingMeta] = useState(true)
+
+  const [selectedTemplate, setSelectedTemplate] = useState<string | null>(null)
+  const [family, setFamily] = useState('')
+  const [placement, setPlacement] = useState<string>('')
+  const [selectedMeta, setSelectedMeta] = useState<string[]>([])
+  const [cutoutB64, setCutoutB64] = useState<string | null>(null)
+  const [selectedImageUrl, setSelectedImageUrl] = useState<string | null>(null)
+  const [loadingImage, setLoadingImage] = useState(false)
+
+  const [instruction, setInstruction] = useState('')
+  const [generating, setGenerating] = useState(false)
+  const [resultB64, setResultB64] = useState<string | null>(null)
+  const [uploading, setUploading] = useState(false)
+  const [uploadedUrl, setUploadedUrl] = useState<string | null>(null)
+  const [error, setError] = useState<string | null>(null)
+
+  const fileRef = useRef<HTMLInputElement>(null)
+  const templateFileRef = useRef<HTMLInputElement>(null)
+  const [uploadingTemplate, setUploadingTemplate] = useState(false)
+
+  useEffect(() => {
+    Promise.all([
+      fetch('/api/mockup/templates').then(r => r.json()),
+      fetch('/api/sheets/tabs').then(r => r.json()),
+      fetch(`/api/mockup/product-meta/${product.shopifyId}`).then(r => r.json()),
+      product.ref ? fetch(`/api/products/sheet-info?ref=${encodeURIComponent(product.ref)}`).then(r => r.ok ? r.json() : null) : Promise.resolve(null),
+    ]).then(([tplData, tabsData, metaData, sheetData]) => {
+      setTemplates(tplData as MockupTemplate[])
+      const tabs: string[] = (tabsData.tabs ?? []).filter((t: string) =>
+        !['COLLECTIONS', 'LIVRAISONS', 'ECOPART', 'RECAP'].some(x => t.toUpperCase().includes(x))
+      )
+      setFamilies(tabs)
+      const sheetFamille = sheetData?.product?.famille
+      setFamily(sheetFamille && tabs.includes(sheetFamille) ? sheetFamille : tabs[0] ?? '')
+      setMetafields(metaData.metafields ?? [])
+    }).finally(() => setLoadingMeta(false))
+  }, [product.shopifyId, product.ref])
+
+  const isCarrelage = family.toLowerCase().includes('carrelage')
+
+  const filteredTemplates = templates.filter(t => {
+    if (t.family !== family && t.family !== 'Tous') return false
+    if (isCarrelage && placement && t.placement && t.placement !== placement) return false
+    return true
+  })
+
+  const dimensionStr = selectedMeta.length > 0
+    ? selectedMeta.map(key => {
+        const mf = metafields.find(m => `${m.namespace}.${m.key}` === key)
+        return mf ? `${mf.key}: ${mf.value}` : ''
+      }).filter(Boolean).join(', ')
+    : undefined
+
+  const selectExistingImage = async (url: string) => {
+    setSelectedImageUrl(url)
+    setCutoutB64(null)
+    setLoadingImage(true)
+    setError(null)
+    try {
+      const b64 = await urlToBase64(url)
+      setCutoutB64(b64)
+    } catch {
+      setError('Impossible de charger cette image')
+      setSelectedImageUrl(null)
+    } finally {
+      setLoadingImage(false)
+    }
+  }
+
+  const handleFileUpload = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0]
+    if (!file) return
+    setSelectedImageUrl(null)
+    const reader = new FileReader()
+    reader.onload = ev => setCutoutB64((ev.target?.result as string).split(',')[1])
+    reader.readAsDataURL(file)
+  }
+
+  const uploadTemplate = async (e: React.ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0]
+    if (!file) return
+    setUploadingTemplate(true)
+    const form = new FormData()
+    form.append('name', file.name.replace(/\.[^.]+$/, ''))
+    form.append('family', family || 'Tous')
+    form.append('description', '')
+    form.append('image', file)
+    const res = await fetch('/api/mockup/templates', { method: 'POST', body: form })
+    const tpl = await res.json() as MockupTemplate
+    setTemplates(prev => [...prev, tpl])
+    setSelectedTemplate(tpl.id)
+    setUploadingTemplate(false)
+  }
+
+  const toggleMeta = (key: string) => {
+    setSelectedMeta(prev => prev.includes(key) ? prev.filter(k => k !== key) : [...prev, key])
+  }
+
+  const generate = async () => {
+    if (!selectedTemplate || !cutoutB64) return
+    setGenerating(true)
+    setError(null)
+    setResultB64(null)
+    try {
+      const res = await fetch('/api/mockup/generate', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          templateId: selectedTemplate,
+          productImageBase64: cutoutB64,
+          productName: product.title,
+          family: family || 'Tous',
+          placement: placement || undefined,
+          dimensions: dimensionStr,
+          instruction: instruction || undefined,
+        }),
+      })
+      const data = await res.json()
+      if (!res.ok) throw new Error(data.error)
+      setResultB64(data.imageBase64)
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Erreur')
+    } finally {
+      setGenerating(false)
+    }
+  }
+
+  const upload = async () => {
+    if (!resultB64) return
+    setUploading(true)
+    try {
+      const res = await fetch('/api/images/upload', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ shopifyProductId: product.shopifyId, imageBase64: resultB64, filename: `${product.ref}-mockup.jpg` }),
+      })
+      const data = await res.json()
+      if (!res.ok) throw new Error(data.error)
+      setUploadedUrl(data.url)
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Erreur upload')
+    } finally {
+      setUploading(false)
+    }
+  }
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/70 p-4"
+      onClick={e => { if (e.target === e.currentTarget) onClose() }}>
+      <div className="bg-slate-800 border border-slate-700 rounded-xl w-full max-w-2xl max-h-[90vh] overflow-y-auto">
+
+        {/* Header */}
+        <div className="flex items-center justify-between p-4 border-b border-slate-700 sticky top-0 bg-slate-800 z-10">
+          <div>
+            <h2 className="text-white font-semibold text-sm">Créer un mockup</h2>
+            <p className="text-gray-400 text-xs mt-0.5">
+              {product.title} <span className="font-mono text-indigo-300">{product.ref}</span>
+            </p>
+          </div>
+          <button type="button" onClick={onClose} className="text-gray-400 hover:text-white text-lg leading-none">✕</button>
+        </div>
+
+        <div className="p-4 space-y-5">
+
+          {/* 1. Image de base */}
+          <section>
+            <h3 className="text-xs font-semibold text-gray-300 uppercase tracking-wide mb-2">1. Image du produit</h3>
+            {product.images.length > 0 && (
+              <div className="mb-2">
+                <p className="text-xs text-gray-400 mb-1.5">Images existantes</p>
+                <div className="flex gap-2 flex-wrap">
+                  {product.images.map((url, i) => (
+                    <button key={i} type="button" onClick={() => selectExistingImage(url)}
+                      className={`relative rounded-lg overflow-hidden border-2 transition-all ${selectedImageUrl === url ? 'border-indigo-500' : 'border-slate-600 hover:border-slate-400'}`}>
+                      <img src={url} alt={`Image ${i + 1}`} className="w-16 h-16 object-cover" />
+                      {loadingImage && selectedImageUrl === url && (
+                        <div className="absolute inset-0 bg-black/50 flex items-center justify-center">
+                          <span className="text-xs text-white">…</span>
+                        </div>
+                      )}
+                    </button>
+                  ))}
+                </div>
+              </div>
+            )}
+            <div>
+              <p className="text-xs text-gray-400 mb-1">Ou uploader une image découpée (PNG)</p>
+              <input ref={fileRef} type="file" accept="image/*" onChange={handleFileUpload} className="text-xs text-gray-300" />
+            </div>
+            {cutoutB64 && !loadingImage && (
+              <p className="text-xs text-green-400 mt-1">✓ Image prête</p>
+            )}
+          </section>
+
+          {/* 2. Famille + placement */}
+          <section>
+            <h3 className="text-xs font-semibold text-gray-300 uppercase tracking-wide mb-2">2. Famille</h3>
+            {families.length > 0 ? (
+              <div className="space-y-2">
+                <select value={family} onChange={e => { setFamily(e.target.value); setPlacement('') }}
+                  className="w-full bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-sm text-white focus:outline-none focus:ring-1 focus:ring-indigo-500">
+                  {families.map(f => <option key={f}>{f}</option>)}
+                </select>
+                {isCarrelage && (
+                  <div>
+                    <p className="text-xs text-gray-400 mb-1.5">Placement</p>
+                    <div className="flex gap-2">
+                      {[{ val: 'sol', label: 'Sol' }, { val: 'mur', label: 'Mur (faïence)' }].map(({ val, label }) => (
+                        <button key={val} type="button" onClick={() => setPlacement(p => p === val ? '' : val)}
+                          className={`px-3 py-1.5 rounded text-xs font-medium transition-colors ${placement === val ? 'bg-indigo-600 text-white' : 'bg-slate-700 text-gray-300 hover:bg-slate-600'}`}>
+                          {label}
+                        </button>
+                      ))}
+                    </div>
+                  </div>
+                )}
+              </div>
+            ) : (
+              <p className="text-xs text-gray-500">{loadingMeta ? 'Chargement…' : 'Aucune famille disponible'}</p>
+            )}
+          </section>
+
+          {/* 3. Caractéristiques (metafields) */}
+          {metafields.length > 0 && (
+            <section>
+              <h3 className="text-xs font-semibold text-gray-300 uppercase tracking-wide mb-2">3. Caractéristiques à inclure dans le prompt</h3>
+              <div className="space-y-1 max-h-36 overflow-y-auto">
+                {metafields.map(mf => {
+                  const key = `${mf.namespace}.${mf.key}`
+                  return (
+                    <label key={key} className="flex items-center gap-2 cursor-pointer group">
+                      <input type="checkbox" checked={selectedMeta.includes(key)} onChange={() => toggleMeta(key)}
+                        className="rounded border-slate-600 bg-slate-700 text-indigo-500 focus:ring-indigo-500" />
+                      <span className="text-xs text-gray-300 group-hover:text-white">
+                        <span className="font-medium">{mf.key}</span>
+                        <span className="text-gray-500 ml-1">{mf.value}</span>
+                      </span>
+                    </label>
+                  )
+                })}
+              </div>
+              {dimensionStr && (
+                <p className="text-xs text-indigo-300 mt-1.5">Inclus dans le prompt : {dimensionStr}</p>
+              )}
+            </section>
+          )}
+
+          {/* 4. Template */}
+          <section>
+            <div className="flex items-center justify-between mb-2">
+              <h3 className="text-xs font-semibold text-gray-300 uppercase tracking-wide">
+                {metafields.length > 0 ? '4.' : '3.'} Image de référence (template)
+              </h3>
+              <button type="button" onClick={() => templateFileRef.current?.click()}
+                disabled={uploadingTemplate}
+                className="text-xs text-indigo-400 hover:text-indigo-300 disabled:opacity-40">
+                {uploadingTemplate ? 'Upload…' : '+ Uploader une nouvelle'}
+              </button>
+              <input ref={templateFileRef} type="file" accept="image/*" className="hidden" onChange={uploadTemplate} />
+            </div>
+            {filteredTemplates.length === 0 ? (
+              <p className="text-xs text-gray-500">Aucun template pour cette famille. Uploadez-en un ci-dessus.</p>
+            ) : (
+              <div className="grid grid-cols-4 gap-2">
+                {filteredTemplates.map(t => (
+                  <button key={t.id} type="button" onClick={() => setSelectedTemplate(t.id)}
+                    className={`relative rounded-lg overflow-hidden border-2 transition-all ${selectedTemplate === t.id ? 'border-indigo-500' : 'border-slate-600 hover:border-slate-400'}`}>
+                    <img src={`/api/mockup/templates/image/${t.filename}`} alt={t.name} className="w-full h-16 object-cover" />
+                    <div className="absolute bottom-0 left-0 right-0 bg-black/60 px-1 py-0.5">
+                      <p className="text-xs text-white truncate">{t.name}</p>
+                    </div>
+                  </button>
+                ))}
+              </div>
+            )}
+          </section>
+
+          {/* Generate */}
+          <button type="button" onClick={generate}
+            disabled={!selectedTemplate || !cutoutB64 || generating || loadingImage}
+            className="w-full py-2 rounded-lg bg-indigo-600 text-white text-sm font-medium disabled:opacity-40 hover:bg-indigo-500 transition-colors">
+            {generating ? 'Génération en cours…' : 'Générer le mockup'}
+          </button>
+
+          {error && <p className="text-xs text-red-400">{error}</p>}
+
+          {/* Result */}
+          {resultB64 && (
+            <div className="space-y-3">
+              <img src={`data:image/jpeg;base64,${resultB64}`} alt="Mockup" className="w-full rounded-lg border border-slate-600" />
+              <div className="flex gap-2">
+                <input type="text" value={instruction} onChange={e => setInstruction(e.target.value)}
+                  placeholder="Instruction pour regénérer (optionnel)…"
+                  className="flex-1 bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-xs text-white focus:outline-none focus:ring-1 focus:ring-indigo-500" />
+                <button type="button" onClick={generate} disabled={generating}
+                  className="px-3 py-1.5 rounded bg-slate-600 text-xs text-white hover:bg-slate-500 disabled:opacity-40">
+                  {generating ? '…' : '↺ Regénérer'}
+                </button>
+              </div>
+              {uploadedUrl ? (
+                <p className="text-xs text-green-400">✓ Uploadé sur Shopify</p>
+              ) : (
+                <button type="button" onClick={upload} disabled={uploading}
+                  className="w-full py-2 rounded-lg bg-emerald-600 text-white text-sm font-medium disabled:opacity-40 hover:bg-emerald-500 transition-colors">
+                  {uploading ? 'Upload…' : '↑ Uploader sur Shopify'}
+                </button>
+              )}
+            </div>
+          )}
+        </div>
+      </div>
+    </div>
+  )
+}

src/components/mockup/MockupModalFromImage.tsx

@@ -0,0 +1,288 @@
+'use client'
+import { useState, useEffect, useRef } from 'react'
+import type { ImageItem } from '@/types/images'
+import type { MockupTemplate } from '@/types/mockup'
+
+interface Props {
+  item: ImageItem
+  onClose: () => void
+}
+
+function blobToBase64(blob: Blob): Promise<string> {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader()
+    reader.onload = () => resolve((reader.result as string).split(',')[1])
+    reader.onerror = reject
+    reader.readAsDataURL(blob)
+  })
+}
+
+export function MockupModalFromImage({ item, onClose }: Props) {
+  const [templates, setTemplates] = useState<MockupTemplate[]>([])
+  const [families, setFamilies] = useState<string[]>([])
+  const [family, setFamily] = useState('')
+  const [dimensions, setDimensions] = useState('')
+  const [selectedTemplate, setSelectedTemplate] = useState<string | null>(null)
+  const [instruction, setInstruction] = useState('')
+  const [generating, setGenerating] = useState(false)
+  const [resultB64, setResultB64] = useState<string | null>(null)
+  const [uploading, setUploading] = useState(false)
+  const [uploadedUrl, setUploadedUrl] = useState<string | null>(null)
+  const [error, setError] = useState<string | null>(null)
+  const templateFileRef = useRef<HTMLInputElement>(null)
+  const [uploadingTemplate, setUploadingTemplate] = useState(false)
+
+  useEffect(() => {
+    Promise.all([
+      fetch('/api/mockup/templates').then(r => r.json()),
+      fetch('/api/sheets/tabs').then(r => r.json()),
+      item.ref ? fetch(`/api/products/sheet-info?ref=${encodeURIComponent(item.ref)}`).then(r => r.ok ? r.json() : null) : Promise.resolve(null),
+    ]).then(([tplData, tabsData, sheetData]) => {
+      setTemplates(tplData as MockupTemplate[])
+      const tabs: string[] = (tabsData.tabs ?? []).filter((t: string) =>
+        !['COLLECTIONS', 'LIVRAISONS', 'ECOPART', 'RECAP'].some(x => t.toUpperCase().includes(x))
+      )
+      setFamilies(tabs)
+      const sheetFamille = sheetData?.product?.famille
+      setFamily(sheetFamille && tabs.includes(sheetFamille) ? sheetFamille : tabs[0] ?? '')
+      const { longueur, largeur } = sheetData?.product ?? {}
+      if (longueur && largeur) setDimensions(`${longueur}x${largeur}cm`)
+      else if (longueur) setDimensions(`${longueur}cm`)
+    })
+  }, [item.ref])
+
+  const filteredTemplates = templates.filter(t =>
+    t.family === family || t.family === 'Tous'
+  )
+
+  const uploadTemplate = async (e: React.ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0]
+    if (!file) return
+    setUploadingTemplate(true)
+    const form = new FormData()
+    form.append('name', file.name.replace(/\.[^.]+$/, ''))
+    form.append('family', family || 'Tous')
+    form.append('description', '')
+    form.append('image', file)
+    const res = await fetch('/api/mockup/templates', { method: 'POST', body: form })
+    const tpl = await res.json() as MockupTemplate
+    setTemplates(prev => [...prev, tpl])
+    setSelectedTemplate(tpl.id)
+    setUploadingTemplate(false)
+  }
+
+  const generate = async () => {
+    if (!selectedTemplate) return
+    setGenerating(true)
+    setError(null)
+    setResultB64(null)
+    try {
+      // Utilise l'image détourée si disponible, sinon l'originale
+      const sourceBlob = item.processedBlob ?? item.originalBlob
+      const productImageBase64 = await blobToBase64(sourceBlob)
+      const res = await fetch('/api/mockup/generate', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          templateId: selectedTemplate,
+          productImageBase64,
+          productName: item.shopifyProductTitle ?? item.ref,
+          family: family || 'Tous',
+          dimensions: dimensions || undefined,
+          instruction: instruction || undefined,
+        }),
+      })
+      const data = await res.json()
+      if (!res.ok) throw new Error(data.error)
+      setResultB64(data.imageBase64)
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Erreur')
+    } finally {
+      setGenerating(false)
+    }
+  }
+
+  const upload = async () => {
+    if (!resultB64 || !item.shopifyProductId) return
+    setUploading(true)
+    try {
+      const res = await fetch('/api/images/upload', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          shopifyProductId: item.shopifyProductId,
+          imageBase64: resultB64,
+          filename: `${item.ref}-mockup.jpg`,
+        }),
+      })
+      const data = await res.json()
+      if (!res.ok) throw new Error(data.error)
+      setUploadedUrl(data.url)
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Erreur upload')
+    } finally {
+      setUploading(false)
+    }
+  }
+
+  const downloadResult = () => {
+    if (!resultB64) return
+    const link = document.createElement('a')
+    link.href = `data:image/jpeg;base64,${resultB64}`
+    link.download = `${item.ref}-mockup.jpg`
+    link.click()
+  }
+
+  const sourceLabel = item.processedBlob ? 'image détourée' : 'image originale'
+
+  return (
+    <div
+      className="fixed inset-0 z-50 flex items-center justify-center bg-black/70 p-4"
+      onClick={e => { if (e.target === e.currentTarget) onClose() }}
+    >
+      <div className="bg-slate-800 border border-slate-700 rounded-xl w-full max-w-xl max-h-[90vh] overflow-y-auto">
+
+        {/* Header */}
+        <div className="flex items-center justify-between p-4 border-b border-slate-700 sticky top-0 bg-slate-800 z-10">
+          <div>
+            <h2 className="text-white font-semibold text-sm">Créer un mockup</h2>
+            <p className="text-gray-400 text-xs mt-0.5">
+              {item.shopifyProductTitle ?? item.ref}
+              <span className="ml-2 text-indigo-300 font-mono">{item.ref}</span>
+              <span className="ml-2 text-slate-500">· {sourceLabel}</span>
+            </p>
+          </div>
+          <button type="button" onClick={onClose} className="text-gray-400 hover:text-white text-lg leading-none">✕</button>
+        </div>
+
+        <div className="p-4 space-y-5">
+
+          {/* Famille */}
+          <section>
+            <h3 className="text-xs font-semibold text-gray-300 uppercase tracking-wide mb-2">Famille</h3>
+            <select
+              value={family}
+              onChange={e => setFamily(e.target.value)}
+              className="w-full bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-sm text-white focus:outline-none focus:ring-1 focus:ring-indigo-500"
+            >
+              {families.map(f => <option key={f}>{f}</option>)}
+            </select>
+          </section>
+
+          {/* Template */}
+          <section>
+            <div className="flex items-center justify-between mb-2">
+              <h3 className="text-xs font-semibold text-gray-300 uppercase tracking-wide">Template</h3>
+              <button
+                type="button"
+                onClick={() => templateFileRef.current?.click()}
+                disabled={uploadingTemplate}
+                className="text-xs text-indigo-400 hover:text-indigo-300 disabled:opacity-40"
+              >
+                {uploadingTemplate ? 'Upload…' : '+ Nouveau'}
+              </button>
+              <input ref={templateFileRef} type="file" accept="image/*" className="hidden" onChange={uploadTemplate} />
+            </div>
+            {filteredTemplates.length === 0 ? (
+              <p className="text-xs text-gray-500">Aucun template pour cette famille. Uploadez-en un.</p>
+            ) : (
+              <div className="grid grid-cols-4 gap-2">
+                {filteredTemplates.map(t => (
+                  <button
+                    key={t.id}
+                    type="button"
+                    onClick={() => setSelectedTemplate(t.id)}
+                    className={`relative rounded-lg overflow-hidden border-2 transition-all ${selectedTemplate === t.id ? 'border-indigo-500' : 'border-slate-600 hover:border-slate-400'}`}
+                  >
+                    <img src={`/api/mockup/templates/image/${t.filename}`} alt={t.name} className="w-full h-16 object-cover" />
+                    <div className="absolute bottom-0 left-0 right-0 bg-black/60 px-1 py-0.5">
+                      <p className="text-xs text-white truncate">{t.name}</p>
+                    </div>
+                  </button>
+                ))}
+              </div>
+            )}
+          </section>
+
+          {/* Instruction libre */}
+          <section>
+            <label className="block text-xs font-semibold text-gray-300 uppercase tracking-wide mb-1">
+              Instruction personnalisée <span className="text-gray-500 font-normal normal-case">(optionnel)</span>
+            </label>
+            <input
+              type="text"
+              value={instruction}
+              onChange={e => setInstruction(e.target.value)}
+              placeholder="Ex: fond beige, lumière naturelle, ambiance chaleureuse…"
+              className="w-full bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-xs text-white focus:outline-none focus:ring-1 focus:ring-indigo-500"
+            />
+          </section>
+
+          <button
+            type="button"
+            onClick={generate}
+            disabled={!selectedTemplate || generating}
+            className="w-full py-2 rounded-lg bg-indigo-600 text-white text-sm font-medium disabled:opacity-40 hover:bg-indigo-500 transition-colors"
+          >
+            {generating ? 'Génération en cours…' : 'Générer le mockup'}
+          </button>
+
+          {error && <p className="text-xs text-red-400">{error}</p>}
+
+          {/* Résultat */}
+          {resultB64 && (
+            <div className="space-y-3">
+              <img
+                src={`data:image/jpeg;base64,${resultB64}`}
+                alt="Mockup"
+                className="w-full rounded-lg border border-slate-600"
+              />
+              <div className="flex gap-2">
+                <input
+                  type="text"
+                  value={instruction}
+                  onChange={e => setInstruction(e.target.value)}
+                  placeholder="Modifier l'instruction et regénérer…"
+                  className="flex-1 bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-xs text-white focus:outline-none focus:ring-1 focus:ring-indigo-500"
+                />
+                <button
+                  type="button"
+                  onClick={generate}
+                  disabled={generating}
+                  className="px-3 py-1.5 rounded bg-slate-600 text-xs text-white hover:bg-slate-500 disabled:opacity-40"
+                >
+                  {generating ? '…' : '↺'}
+                </button>
+              </div>
+              <div className="flex gap-2">
+                <button
+                  type="button"
+                  onClick={downloadResult}
+                  className="flex-1 py-2 rounded-lg bg-slate-700 hover:bg-slate-600 text-white text-sm font-medium transition-colors"
+                >
+                  ↓ Télécharger
+                </button>
+                {item.shopifyProductId ? (
+                  uploadedUrl ? (
+                    <p className="flex-1 py-2 text-center text-xs text-green-400 self-center">✓ Uploadé sur Shopify</p>
+                  ) : (
+                    <button
+                      type="button"
+                      onClick={upload}
+                      disabled={uploading}
+                      className="flex-1 py-2 rounded-lg bg-emerald-600 hover:bg-emerald-500 text-white text-sm font-medium disabled:opacity-40 transition-colors"
+                    >
+                      {uploading ? 'Upload…' : '↑ Uploader sur Shopify'}
+                    </button>
+                  )
+                ) : (
+                  <p className="flex-1 py-2 text-center text-xs text-slate-500 self-center">Pas de produit associé</p>
+                )}
+              </div>
+            </div>
+          )}
+        </div>
+      </div>
+    </div>
+  )
+}

src/components/mockup/TemplateLibrary.tsx

@@ -0,0 +1,186 @@
+'use client'
+import { useState, useEffect, useRef } from 'react'
+import type { MockupTemplate } from '@/types/mockup'
+
+const CARRELAGE_PLACEMENTS = ['sol', 'mur']
+
+export function TemplateLibrary() {
+  const [templates, setTemplates] = useState<MockupTemplate[]>([])
+  const [families, setFamilies] = useState<string[]>(['Tous'])
+  const [loading, setLoading] = useState(true)
+  const [uploading, setUploading] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+  const [name, setName] = useState('')
+  const [family, setFamily] = useState('Tous')
+  const [placement, setPlacement] = useState<string>('')
+  const [description, setDescription] = useState('')
+  const fileRef = useRef<HTMLInputElement>(null)
+
+  const load = () => {
+    setLoading(true)
+    Promise.all([
+      fetch('/api/mockup/templates').then(r => r.json()),
+      fetch('/api/sheets/tabs').then(r => r.json()),
+    ]).then(([tplData, tabsData]) => {
+      setTemplates(tplData as MockupTemplate[])
+      const tabs: string[] = (tabsData.tabs ?? []).filter((t: string) =>
+        !['COLLECTIONS', 'LIVRAISONS', 'ECOPART', 'RECAP'].some(x => t.toUpperCase().includes(x))
+      )
+      const allFamilies = ['Tous', ...tabs]
+      setFamilies(allFamilies)
+      if (!allFamilies.includes(family)) setFamily(allFamilies[0])
+    }).finally(() => setLoading(false))
+  }
+
+  useEffect(load, [])
+
+  const isCarrelage = family.toLowerCase().includes('carrelage')
+
+  const upload = async (e: React.FormEvent) => {
+    e.preventDefault()
+    const file = fileRef.current?.files?.[0]
+    if (!file || !name || !family) return
+    if (isCarrelage && !placement) return
+    setUploading(true)
+    setError(null)
+    try {
+      const form = new FormData()
+      form.append('name', name)
+      form.append('family', family)
+      form.append('description', description)
+      if (isCarrelage && placement) form.append('placement', placement)
+      form.append('image', file)
+      const res = await fetch('/api/mockup/templates', { method: 'POST', body: form })
+      if (!res.ok) throw new Error((await res.json()).error)
+      setName(''); setDescription(''); setPlacement('')
+      if (fileRef.current) fileRef.current.value = ''
+      load()
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Erreur')
+    } finally {
+      setUploading(false)
+    }
+  }
+
+  const remove = async (id: string) => {
+    await fetch(`/api/mockup/templates/${id}`, { method: 'DELETE' })
+    load()
+  }
+
+  const allUsedFamilies = Array.from(new Set(templates.map(t => t.family)))
+  const displayFamilies = families.filter(f => allUsedFamilies.includes(f) || f === 'Tous')
+
+  const groupedTemplates = (familyName: string) => {
+    const byFamily = templates.filter(t => t.family === familyName)
+    const isCarr = familyName.toLowerCase().includes('carrelage')
+    if (!isCarr) return [{ label: null, items: byFamily }]
+    return CARRELAGE_PLACEMENTS.map(p => ({
+      label: p === 'mur' ? 'Mur (faïence)' : 'Sol',
+      items: byFamily.filter(t => t.placement === p),
+    })).filter(g => g.items.length > 0)
+  }
+
+  return (
+    <div className="space-y-6">
+      {/* Upload form */}
+      <div className="bg-slate-800 rounded-xl p-4 border border-slate-700">
+        <h2 className="text-sm font-semibold text-white mb-3">Ajouter un template</h2>
+        <form onSubmit={upload} className="space-y-3">
+          <div className="grid grid-cols-2 gap-3">
+            <div>
+              <label className="block text-xs text-gray-400 mb-1">Nom</label>
+              <input value={name} onChange={e => setName(e.target.value)}
+                placeholder="ex: Salle de bain moderne"
+                className="w-full bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-sm text-white focus:outline-none focus:ring-1 focus:ring-indigo-500" />
+            </div>
+            <div>
+              <label className="block text-xs text-gray-400 mb-1">Famille</label>
+              <select value={family} onChange={e => { setFamily(e.target.value); setPlacement('') }}
+                className="w-full bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-sm text-white focus:outline-none focus:ring-1 focus:ring-indigo-500">
+                {families.map(f => <option key={f}>{f}</option>)}
+              </select>
+            </div>
+          </div>
+
+          {isCarrelage && (
+            <div>
+              <label className="block text-xs text-gray-400 mb-1">Placement <span className="text-red-400">*</span></label>
+              <div className="flex gap-2">
+                {CARRELAGE_PLACEMENTS.map(p => (
+                  <button key={p} type="button" onClick={() => setPlacement(p)}
+                    className={`px-4 py-1.5 rounded text-sm font-medium transition-colors ${placement === p ? 'bg-indigo-600 text-white' : 'bg-slate-700 text-gray-300 hover:bg-slate-600'}`}>
+                    {p === 'mur' ? 'Mur (faïence)' : 'Sol'}
+                  </button>
+                ))}
+              </div>
+            </div>
+          )}
+
+          <div>
+            <label className="block text-xs text-gray-400 mb-1">Description (optionnel)</label>
+            <input value={description} onChange={e => setDescription(e.target.value)}
+              placeholder="ex: Salle de bain lumineuse"
+              className="w-full bg-slate-700 border border-slate-600 rounded px-2 py-1.5 text-sm text-white focus:outline-none focus:ring-1 focus:ring-indigo-500" />
+          </div>
+          <div>
+            <label className="block text-xs text-gray-400 mb-1">Image</label>
+            <input ref={fileRef} type="file" accept="image/*" className="text-sm text-gray-300" />
+          </div>
+          {error && <p className="text-xs text-red-400">{error}</p>}
+          <button type="submit" disabled={uploading || !name || !family || (isCarrelage && !placement)}
+            className="px-4 py-2 bg-indigo-600 text-white text-sm rounded-lg disabled:opacity-40 hover:bg-indigo-500">
+            {uploading ? 'Ajout…' : '+ Ajouter'}
+          </button>
+        </form>
+      </div>
+
+      {/* Templates grouped by family */}
+      {loading ? (
+        <p className="text-sm text-gray-400">Chargement…</p>
+      ) : templates.length === 0 ? (
+        <p className="text-sm text-gray-500">Aucun template. Ajoutez-en un ci-dessus.</p>
+      ) : (
+        <div className="space-y-6">
+          {displayFamilies.map(f => {
+            const groups = groupedTemplates(f)
+            const total = groups.reduce((n, g) => n + g.items.length, 0)
+            if (total === 0) return null
+            return (
+              <div key={f}>
+                <h3 className="text-sm font-medium text-gray-300 mb-3 flex items-center gap-2">
+                  {f}
+                  <span className="text-xs text-gray-500">{total} template{total > 1 ? 's' : ''}</span>
+                </h3>
+                <div className="space-y-4">
+                  {groups.map((group, gi) => (
+                    <div key={gi}>
+                      {group.label && (
+                        <p className="text-xs text-gray-400 font-medium mb-2 uppercase tracking-wide">{group.label}</p>
+                      )}
+                      <div className="grid grid-cols-2 md:grid-cols-3 lg:grid-cols-4 gap-3">
+                        {group.items.map(t => (
+                          <div key={t.id} className="relative rounded-lg overflow-hidden border border-slate-600 group">
+                            <img src={`/api/mockup/templates/image/${t.filename}`} alt={t.name}
+                              className="w-full h-32 object-cover" />
+                            <div className="p-2 bg-slate-800">
+                              <p className="text-xs text-white font-medium truncate">{t.name}</p>
+                              {t.description && <p className="text-xs text-gray-400 truncate">{t.description}</p>}
+                            </div>
+                            <button type="button" onClick={() => remove(t.id)}
+                              className="absolute top-1 right-1 bg-red-600/80 hover:bg-red-500 text-white text-xs rounded px-1.5 py-0.5 opacity-0 group-hover:opacity-100 transition-opacity">
+                              ✕
+                            </button>
+                          </div>
+                        ))}
+                      </div>
+                    </div>
+                  ))}
+                </div>
+              </div>
+            )
+          })}
+        </div>
+      )}
+    </div>
+  )
+}

src/components/products/ProductFiltersBar.tsx

@@ -0,0 +1,38 @@
+'use client'
+import type { ProductFilters } from '@/types/products'
+
+interface Props {
+  filters: ProductFilters
+  total: number
+  onChange: (f: Partial<ProductFilters>) => void
+}
+
+export function ProductFiltersBar({ filters, total, onChange }: Props) {
+  return (
+    <div className="flex flex-wrap gap-3 items-center mb-4">
+      <input
+        type="text"
+        placeholder="Rechercher ref ou titre..."
+        value={filters.search}
+        onChange={(e) => onChange({ search: e.target.value })}
+        className="flex-1 min-w-48 bg-slate-700 border border-slate-600 rounded-lg px-3 py-2 text-sm text-white placeholder-gray-400 focus:outline-none focus:ring-2 focus:ring-indigo-500"
+      />
+      <div className="flex gap-2">
+        {(['all', 'active', 'draft'] as const).map((s) => (
+          <button
+            key={s}
+            onClick={() => onChange({ status: s })}
+            className={`px-3 py-2 rounded-lg text-sm font-medium transition-colors ${
+              filters.status === s
+                ? 'bg-indigo-600 text-white'
+                : 'bg-slate-700 text-gray-300 hover:bg-slate-600'
+            }`}
+          >
+            {s === 'all' ? 'Tous' : s === 'active' ? 'Actifs' : 'Inactifs'}
+          </button>
+        ))}
+      </div>
+      <span className="text-sm text-gray-400 ml-auto">{total} produit{total > 1 ? 's' : ''}</span>
+    </div>
+  )
+}

src/components/products/ProductTable.tsx

@@ -0,0 +1,109 @@
+'use client'
+import { useState } from 'react'
+import type { CatalogProduct } from '@/types/products'
+import { MockupModal } from '@/components/mockup/MockupModal'
+
+interface Props {
+  products: CatalogProduct[]
+  loading: boolean
+}
+
+const PAGE_SIZE = 50
+
+export function ProductTable({ products, loading }: Props) {
+  const [mockupProduct, setMockupProduct] = useState<CatalogProduct | null>(null)
+  if (loading) {
+    return (
+      <div className="flex items-center justify-center py-20 text-gray-400">
+        Chargement des produits…
+      </div>
+    )
+  }
+
+  if (products.length === 0) {
+    return (
+      <div className="text-center py-20 text-gray-400 text-sm">
+        Aucun produit trouvé.
+      </div>
+    )
+  }
+
+  const displayed = products.slice(0, PAGE_SIZE)
+
+  return (
+    <div className="overflow-x-auto">
+      <table className="w-full text-sm">
+        <thead>
+          <tr className="text-left text-gray-400 border-b border-slate-700">
+            <th className="pb-3 pr-4 font-medium">Référence</th>
+            <th className="pb-3 pr-4 font-medium">Images</th>
+            <th className="pb-3 pr-4 font-medium">Titre</th>
+            <th className="pb-3 pr-4 font-medium">Prix</th>
+            <th className="pb-3 pr-4 font-medium">Stock</th>
+            <th className="pb-3 pr-4 font-medium">Statut</th>
+            <th className="pb-3 pr-4 font-medium">Lien</th>
+            <th className="pb-3 font-medium"></th>
+          </tr>
+        </thead>
+        <tbody>
+          {displayed.map((p) => (
+            <tr key={p.shopifyId} className="border-b border-slate-700/50 hover:bg-slate-700/30 transition-colors">
+              <td className="py-3 pr-4 font-mono text-indigo-300">{p.ref}</td>
+              <td className="py-3 pr-4">
+                {p.images.length > 0 ? (
+                  <div className="flex items-center gap-1.5">
+                    <img src={p.images[0]} alt="" className="w-8 h-8 object-cover rounded border border-slate-600" />
+                    {p.images.length > 1 && (
+                      <span className="text-xs text-gray-400">+{p.images.length - 1}</span>
+                    )}
+                  </div>
+                ) : (
+                  <span className="text-xs text-gray-600">—</span>
+                )}
+              </td>
+              <td className="py-3 pr-4 text-white">{p.title}</td>
+              <td className="py-3 pr-4 text-gray-300">{p.price} €</td>
+              <td className="py-3 pr-4 text-gray-300">{p.stock}</td>
+              <td className="py-3 pr-4">
+                <span className={`inline-flex items-center px-2 py-0.5 rounded text-xs font-medium ${
+                  p.status === 'active'
+                    ? 'bg-green-900/50 text-green-300'
+                    : 'bg-gray-700 text-gray-400'
+                }`}>
+                  {p.status === 'active' ? 'Actif' : 'Inactif'}
+                </span>
+              </td>
+              <td className="py-3 pr-4">
+                <a
+                  href={p.shopifyUrl}
+                  target="_blank"
+                  rel="noopener noreferrer"
+                  className="text-indigo-400 hover:text-indigo-300 text-xs underline"
+                >
+                  Shopify ↗
+                </a>
+              </td>
+              <td className="py-3">
+                <button
+                  type="button"
+                  onClick={() => setMockupProduct(p)}
+                  className="text-xs px-2 py-1 rounded bg-slate-700 hover:bg-indigo-600 text-gray-300 hover:text-white transition-colors"
+                >
+                  Mockup
+                </button>
+              </td>
+            </tr>
+          ))}
+        </tbody>
+      </table>
+      {mockupProduct && (
+        <MockupModal product={mockupProduct} onClose={() => setMockupProduct(null)} />
+      )}
+      {products.length > PAGE_SIZE && (
+        <p className="text-center text-gray-400 text-xs mt-4">
+          Affichage des {PAGE_SIZE} premiers résultats sur {products.length}.
+        </p>
+      )}
+    </div>
+  )
+}

src/components/settings/ConnectionStatus.tsx

@@ -0,0 +1,66 @@
+'use client'
+import { useState } from 'react'
+
+interface TestResult {
+  ok: boolean
+  message: string
+}
+
+interface Results {
+  shopify: TestResult
+  sheets: TestResult
+}
+
+export function ConnectionStatus() {
+  const [results, setResults] = useState<Results | null>(null)
+  const [loading, setLoading] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+
+  const runTest = async () => {
+    setLoading(true)
+    setError(null)
+    try {
+      const res = await fetch('/api/admin/connections/test')
+      if (!res.ok) throw new Error('Accès refusé')
+      setResults(await res.json())
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Erreur')
+    } finally {
+      setLoading(false)
+    }
+  }
+
+  return (
+    <div className="bg-slate-800 rounded-xl p-6">
+      <h2 className="text-lg font-semibold text-white mb-4">Test des connexions</h2>
+      <button
+        onClick={runTest}
+        disabled={loading}
+        className="px-4 py-2 bg-indigo-600 hover:bg-indigo-700 disabled:opacity-50 text-white rounded-lg text-sm font-medium transition-colors mb-4"
+      >
+        {loading ? 'Test en cours…' : 'Tester les connexions'}
+      </button>
+      {error && <p className="text-red-400 text-sm mb-4">{error}</p>}
+      {results && (
+        <div className="space-y-3">
+          {(
+            [
+              { key: 'shopify', label: 'Shopify Admin API' },
+              { key: 'sheets', label: 'Google Sheets API' },
+            ] as const
+          ).map(({ key, label }) => (
+            <div key={key} className="flex items-center gap-3 p-3 bg-slate-700 rounded-lg">
+              <span className={`text-lg ${results[key].ok ? 'text-green-400' : 'text-red-400'}`}>
+                {results[key].ok ? '✓' : '✗'}
+              </span>
+              <div>
+                <p className="text-sm font-medium text-white">{label}</p>
+                <p className="text-xs text-gray-400">{results[key].message}</p>
+              </div>
+            </div>
+          ))}
+        </div>
+      )}
+    </div>
+  )
+}

src/components/settings/UsersManager.tsx

@@ -0,0 +1,151 @@
+'use client'
+import { useState, useEffect } from 'react'
+
+interface User {
+  id: string
+  email: string
+  name: string
+  role: string
+  createdAt: string
+}
+
+interface FormData {
+  email: string
+  name: string
+  password: string
+  role: 'admin' | 'gestionnaire'
+}
+
+const EMPTY_FORM: FormData = { email: '', name: '', password: '', role: 'gestionnaire' }
+
+export function UsersManager() {
+  const [users, setUsers] = useState<User[]>([])
+  const [loading, setLoading] = useState(true)
+  const [form, setForm] = useState<FormData>(EMPTY_FORM)
+  const [submitting, setSubmitting] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+  const [success, setSuccess] = useState<string | null>(null)
+
+  const load = () => {
+    setLoading(true)
+    fetch('/api/admin/users')
+      .then((r) => r.json())
+      .then(setUsers)
+      .catch(() => setError('Impossible de charger les utilisateurs'))
+      .finally(() => setLoading(false))
+  }
+
+  useEffect(load, [])
+
+  const handleCreate = async (e: React.FormEvent) => {
+    e.preventDefault()
+    setSubmitting(true)
+    setError(null)
+    setSuccess(null)
+    try {
+      const res = await fetch('/api/admin/users', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify(form),
+      })
+      const data = await res.json()
+      if (!res.ok) throw new Error(data.error)
+      setSuccess(`Utilisateur ${data.name} créé.`)
+      setForm(EMPTY_FORM)
+      load()
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Erreur')
+    } finally {
+      setSubmitting(false)
+    }
+  }
+
+  const handleDelete = async (id: string, name: string) => {
+    if (!confirm(`Supprimer ${name} ?`)) return
+    try {
+      const res = await fetch(`/api/admin/users/${id}`, { method: 'DELETE' })
+      const data = await res.json()
+      if (!res.ok) throw new Error(data.error)
+      load()
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Erreur suppression')
+    }
+  }
+
+  return (
+    <div className="bg-slate-800 rounded-xl p-6">
+      <h2 className="text-lg font-semibold text-white mb-4">Gestion des utilisateurs</h2>
+
+      {/* Liste */}
+      {loading ? (
+        <p className="text-gray-400 text-sm mb-6">Chargement…</p>
+      ) : (
+        <div className="mb-6 space-y-2">
+          {users.map((u) => (
+            <div key={u.id} className="flex items-center justify-between p-3 bg-slate-700 rounded-lg">
+              <div>
+                <p className="text-sm font-medium text-white">{u.name}</p>
+                <p className="text-xs text-gray-400">{u.email} — <span className="capitalize">{u.role}</span></p>
+              </div>
+              <button
+                onClick={() => handleDelete(u.id, u.name)}
+                className="text-red-400 hover:text-red-300 text-xs px-2 py-1 rounded hover:bg-red-900/30 transition-colors"
+              >
+                Supprimer
+              </button>
+            </div>
+          ))}
+          {users.length === 0 && <p className="text-gray-400 text-sm">Aucun utilisateur.</p>}
+        </div>
+      )}
+
+      {/* Formulaire création */}
+      <form onSubmit={handleCreate} className="space-y-3">
+        <h3 className="text-sm font-medium text-gray-300">Nouvel utilisateur</h3>
+        <div className="grid grid-cols-2 gap-3">
+          <input
+            required
+            type="email"
+            placeholder="Email"
+            value={form.email}
+            onChange={(e) => setForm((f) => ({ ...f, email: e.target.value }))}
+            className="bg-slate-700 border border-slate-600 rounded-lg px-3 py-2 text-sm text-white placeholder-gray-400 focus:outline-none focus:ring-2 focus:ring-indigo-500"
+          />
+          <input
+            required
+            type="text"
+            placeholder="Nom"
+            value={form.name}
+            onChange={(e) => setForm((f) => ({ ...f, name: e.target.value }))}
+            className="bg-slate-700 border border-slate-600 rounded-lg px-3 py-2 text-sm text-white placeholder-gray-400 focus:outline-none focus:ring-2 focus:ring-indigo-500"
+          />
+          <input
+            required
+            type="password"
+            placeholder="Mot de passe"
+            value={form.password}
+            onChange={(e) => setForm((f) => ({ ...f, password: e.target.value }))}
+            className="bg-slate-700 border border-slate-600 rounded-lg px-3 py-2 text-sm text-white placeholder-gray-400 focus:outline-none focus:ring-2 focus:ring-indigo-500"
+          />
+          <select
+            value={form.role}
+            onChange={(e) => setForm((f) => ({ ...f, role: e.target.value as FormData['role'] }))}
+            className="bg-slate-700 border border-slate-600 rounded-lg px-3 py-2 text-sm text-white focus:outline-none focus:ring-2 focus:ring-indigo-500"
+          >
+            <option value="gestionnaire">Gestionnaire</option>
+            <option value="admin">Admin</option>
+          </select>
+        </div>
+        {error && <p className="text-red-400 text-sm">{error}</p>}
+        {success && <p className="text-green-400 text-sm">{success}</p>}
+        <button
+          type="submit"
+          disabled={submitting}
+          className="px-4 py-2 bg-indigo-600 hover:bg-indigo-700 disabled:opacity-50 text-white rounded-lg text-sm font-medium transition-colors"
+        >
+          {submitting ? 'Création…' : "Créer l'utilisateur"}
+        </button>
+      </form>
+    </div>
+  )
+}

src/components/sync/DiffTable.tsx

@@ -0,0 +1,123 @@
+'use client'
+import { useState } from 'react'
+import type { SyncChangeType, DiffResult } from '@/types/sync'
+
+interface DiffTableProps {
+  diff: DiffResult
+}
+
+const TYPE_CONFIG: Record<SyncChangeType, { label: string; color: string; bg: string }> = {
+  create:     { label: '🟢 Nouveau',       color: 'text-green-400',  bg: 'bg-green-950/30' },
+  update:     { label: '🔵 Mis à jour',    color: 'text-blue-400',   bg: 'bg-blue-950/30' },
+  deactivate: { label: '🔴 Désactivé',     color: 'text-red-400',    bg: 'bg-red-950/30' },
+  unchanged:  { label: '⚫ Inchangé',      color: 'text-slate-500',  bg: '' },
+}
+
+const PAGE_SIZE = 20
+
+export function DiffTable({ diff }: DiffTableProps) {
+  const [filter, setFilter] = useState<SyncChangeType | 'all'>('all')
+  const [page, setPage] = useState(0)
+
+  const visible = diff.changes.filter((c) => c.type !== 'unchanged')
+  const filtered = filter === 'all' ? visible : visible.filter((c) => c.type === filter)
+  const paginated = filtered.slice(page * PAGE_SIZE, (page + 1) * PAGE_SIZE)
+  const totalPages = Math.ceil(filtered.length / PAGE_SIZE)
+
+  return (
+    <div className="flex flex-col gap-3">
+      {/* Résumé */}
+      <div className="flex gap-4 flex-wrap text-sm">
+        {(['create', 'update', 'deactivate', 'unchanged'] as SyncChangeType[]).map((type) => (
+          <span key={type} className={TYPE_CONFIG[type].color}>
+            {TYPE_CONFIG[type].label} : {diff.summary[type]}
+          </span>
+        ))}
+      </div>
+
+      {/* Filtres */}
+      <div className="flex gap-2 flex-wrap">
+        {(['all', 'create', 'update', 'deactivate'] as const).map((f) => (
+          <button
+            key={f}
+            onClick={() => { setFilter(f); setPage(0) }}
+            className={`px-3 py-1 text-xs rounded-full border transition-colors ${
+              filter === f
+                ? 'bg-indigo-600 border-indigo-500 text-white'
+                : 'border-slate-700 text-slate-400 hover:text-slate-200'
+            }`}
+          >
+            {f === 'all' ? 'Tous' : TYPE_CONFIG[f].label}
+          </button>
+        ))}
+      </div>
+
+      {/* Tableau */}
+      {paginated.length === 0 ? (
+        <p className="text-slate-600 text-sm py-4 text-center">Aucun changement dans cette catégorie.</p>
+      ) : (
+        <div className="border border-slate-700 rounded-xl overflow-x-auto">
+          <table className="w-full text-xs table-fixed">
+            <colgroup>
+              <col className="w-36" />
+              <col className="w-32" />
+              <col />
+            </colgroup>
+            <thead className="bg-slate-800 text-slate-400">
+              <tr>
+                <th className="px-3 py-2 text-left">Ref</th>
+                <th className="px-3 py-2 text-left">Type</th>
+                <th className="px-3 py-2 text-left">Détail</th>
+              </tr>
+            </thead>
+            <tbody>
+              {paginated.map((change) => (
+                <tr key={change.ref} className={`border-t border-slate-800 ${TYPE_CONFIG[change.type].bg}`}>
+                  <td className="px-3 py-2 font-mono text-slate-300 truncate max-w-0" title={change.ref}>{change.ref}</td>
+                  <td className={`px-3 py-2 font-semibold whitespace-nowrap ${TYPE_CONFIG[change.type].color}`}>
+                    {TYPE_CONFIG[change.type].label}
+                  </td>
+                  <td className="px-3 py-2 text-slate-400">
+                    {change.type === 'update' && change.changedFields?.map((f) => (
+                      <span key={f.field} className="inline-block mr-3">
+                        <span className="text-slate-500">{f.field} : </span>
+                        <span className="line-through text-red-400 mr-1">{f.from}</span>
+                        <span className="text-slate-500 mr-1">→</span>
+                        <span className="text-green-400">{f.to}</span>
+                      </span>
+                    ))}
+                    {change.type === 'create' && (
+                      <span className="text-green-400">{change.sheetProduct?.title}</span>
+                    )}
+                    {change.type === 'deactivate' && (
+                      <span className="text-red-400">{change.shopifyProduct?.title}</span>
+                    )}
+                  </td>
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        </div>
+      )}
+
+      {/* Pagination */}
+      {totalPages > 1 && (
+        <div className="flex gap-2 justify-end">
+          <button
+            onClick={() => setPage((p) => Math.max(0, p - 1))}
+            disabled={page === 0}
+            className="px-3 py-1 text-xs bg-slate-800 rounded disabled:opacity-40 text-slate-300"
+          >← Préc</button>
+          <span className="text-xs text-slate-500 self-center">
+            {page + 1} / {totalPages}
+          </span>
+          <button
+            onClick={() => setPage((p) => Math.min(totalPages - 1, p + 1))}
+            disabled={page >= totalPages - 1}
+            className="px-3 py-1 text-xs bg-slate-800 rounded disabled:opacity-40 text-slate-300"
+          >Suiv →</button>
+        </div>
+      )}
+    </div>
+  )
+}

src/components/sync/SyncHistory.tsx

@@ -0,0 +1,78 @@
+'use client'
+import { useState } from 'react'
+import React from 'react'
+import type { SyncHistoryEntry } from '@/types/sync'
+
+interface SyncHistoryProps {
+  entries: SyncHistoryEntry[]
+}
+
+const STATUS_STYLE = {
+  success: 'text-green-400',
+  partial: 'text-yellow-400',
+  error:   'text-red-400',
+}
+
+export function SyncHistory({ entries }: SyncHistoryProps) {
+  const [expandedId, setExpandedId] = useState<string | null>(null)
+
+  if (entries.length === 0) {
+    return <p className="text-slate-600 text-sm text-center py-6">Aucune synchronisation effectuée.</p>
+  }
+
+  return (
+    <div className="border border-slate-700 rounded-xl overflow-hidden">
+      <table className="w-full text-xs">
+        <thead className="bg-slate-800 text-slate-400">
+          <tr>
+            <th className="px-3 py-2 text-left">Date</th>
+            <th className="px-3 py-2 text-left">Utilisateur</th>
+            <th className="px-3 py-2 text-right">Créés</th>
+            <th className="px-3 py-2 text-right">MàJ</th>
+            <th className="px-3 py-2 text-right">Désactivés</th>
+            <th className="px-3 py-2 text-right">Erreurs</th>
+            <th className="px-3 py-2 text-left">Statut</th>
+          </tr>
+        </thead>
+        <tbody>
+          {entries.map((entry) => (
+            <React.Fragment key={entry.id}>
+              <tr
+                onClick={() => setExpandedId(expandedId === entry.id ? null : entry.id)}
+                className="border-t border-slate-800 hover:bg-slate-800/50 cursor-pointer"
+              >
+                <td className="px-3 py-2 text-slate-400">
+                  {new Date(entry.createdAt).toLocaleString('fr-FR', {
+                    day: '2-digit', month: '2-digit', year: '2-digit',
+                    hour: '2-digit', minute: '2-digit',
+                  })}
+                </td>
+                <td className="px-3 py-2 text-slate-300">{entry.userName}</td>
+                <td className="px-3 py-2 text-right text-green-400">{entry.created}</td>
+                <td className="px-3 py-2 text-right text-blue-400">{entry.updated}</td>
+                <td className="px-3 py-2 text-right text-red-400">{entry.deactivated}</td>
+                <td className="px-3 py-2 text-right text-yellow-400">{entry.errors || '—'}</td>
+                <td className={`px-3 py-2 font-semibold ${STATUS_STYLE[entry.status]}`}>
+                  {entry.status}
+                </td>
+              </tr>
+              {expandedId === entry.id && (
+                <tr className="border-t border-slate-800 bg-slate-950">
+                  <td colSpan={7} className="px-3 py-3">
+                    <div className="font-mono text-xs max-h-32 overflow-y-auto space-y-0.5">
+                      {entry.log.map((l, i) => (
+                        <p key={i} className={l.status === 'error' ? 'text-red-400' : 'text-slate-400'}>
+                          {l.message}
+                        </p>
+                      ))}
+                    </div>
+                  </td>
+                </tr>
+              )}
+            </React.Fragment>
+          ))}
+        </tbody>
+      </table>
+    </div>
+  )
+}

src/components/sync/SyncProgress.tsx

@@ -0,0 +1,65 @@
+'use client'
+
+interface SyncProgressProps {
+  log: string[]
+  progress: { current: number; total: number } | null
+  summary: { created: number; updated: number; deactivated: number; errors: number; status: string } | null
+}
+
+export function SyncProgress({ log, progress, summary }: SyncProgressProps) {
+  const percent = progress && progress.total > 0
+    ? Math.round((progress.current / progress.total) * 100)
+    : 0
+
+  return (
+    <div className="flex flex-col gap-4">
+      {/* Barre de progression */}
+      {progress && (
+        <div>
+          <div className="flex justify-between text-xs text-slate-400 mb-1">
+            <span>{progress.current} / {progress.total} produits</span>
+            <span>{percent}%</span>
+          </div>
+          <div className="h-2 bg-slate-800 rounded-full overflow-hidden">
+            <div
+              className="h-2 bg-indigo-500 rounded-full transition-all duration-300"
+              style={{ width: `${percent}%` }}
+            />
+          </div>
+        </div>
+      )}
+
+      {/* Log */}
+      <div className="bg-slate-950 rounded-xl border border-slate-800 p-3 h-48 overflow-y-auto font-mono text-xs">
+        {log.length === 0 && (
+          <p className="text-slate-600">Démarrage de la synchronisation…</p>
+        )}
+        {log.map((line, i) => (
+          <p
+            key={i}
+            className={line.startsWith('✗') ? 'text-red-400' : 'text-green-400'}
+          >
+            {line}
+          </p>
+        ))}
+      </div>
+
+      {/* Résultat final */}
+      {summary && (
+        <div className={`rounded-xl p-4 text-sm font-semibold border ${
+          summary.status === 'success'
+            ? 'bg-green-950/30 border-green-800 text-green-300'
+            : summary.status === 'partial'
+              ? 'bg-yellow-950/30 border-yellow-800 text-yellow-300'
+              : 'bg-red-950/30 border-red-800 text-red-300'
+        }`}>
+          {summary.status === 'success' && '✅ '}
+          {summary.status === 'partial' && '⚠️ '}
+          {summary.status === 'error' && '❌ '}
+          Sync terminée — {summary.created} créés, {summary.updated} mis à jour,{' '}
+          {summary.deactivated} désactivés, {summary.errors} erreur{summary.errors > 1 ? 's' : ''}
+        </div>
+      )}
+    </div>
+  )
+}

src/components/sync/SyncStepper.tsx

@@ -0,0 +1,46 @@
+'use client'
+
+const STEPS = [
+  { id: 1, label: 'Analyse Sheets' },
+  { id: 2, label: 'Aperçu diff' },
+  { id: 3, label: 'Confirmation' },
+  { id: 4, label: 'Synchronisation' },
+]
+
+interface SyncStepperProps {
+  currentStep: number  // 1–4
+}
+
+export function SyncStepper({ currentStep }: SyncStepperProps) {
+  return (
+    <div className="flex items-center gap-0">
+      {STEPS.map((step, i) => {
+        const done = currentStep > step.id
+        const active = currentStep === step.id
+        return (
+          <div key={step.id} className="flex items-center">
+            {i > 0 && (
+              <div className={`h-0.5 w-12 ${done ? 'bg-indigo-500' : 'bg-slate-700'}`} />
+            )}
+            <div className="flex flex-col items-center gap-1">
+              <div
+                className={`w-8 h-8 rounded-full flex items-center justify-center text-xs font-bold transition-colors ${
+                  done
+                    ? 'bg-indigo-500 text-white'
+                    : active
+                      ? 'bg-indigo-600 text-white ring-2 ring-indigo-400'
+                      : 'bg-slate-800 text-slate-500 border border-slate-700'
+                }`}
+              >
+                {done ? '✓' : step.id}
+              </div>
+              <span className={`text-xs ${active ? 'text-slate-200 font-semibold' : 'text-slate-500'}`}>
+                {step.label}
+              </span>
+            </div>
+          </div>
+        )
+      })}
+    </div>
+  )
+}

src/hooks/useImages.ts

@@ -0,0 +1,380 @@
+'use client'
+import { useReducer, useCallback, useRef } from 'react'
+import type { ImageItem, ImageStatus } from '@/types/images'
+
+// File d'attente avec concurrence limitée pour le pipeline IA
+const CONCURRENCY = 2
+
+function createQueue() {
+  let running = 0
+  const queue: Array<() => Promise<void>> = []
+
+  function next() {
+    if (running >= CONCURRENCY || queue.length === 0) return
+    running++
+    const task = queue.shift()!
+    task().finally(() => { running--; next() })
+  }
+
+  return {
+    enqueue(task: () => Promise<void>) {
+      queue.push(task)
+      next()
+    },
+  }
+}
+
+// ── Reducer ───────────────────────────────────────────────────────────────────
+
+type Action =
+  | { type: 'ADD'; items: ImageItem[] }
+  | { type: 'UPDATE'; id: string; patch: Partial<ImageItem> }
+  | { type: 'REMOVE'; id: string }
+
+function reducer(state: ImageItem[], action: Action): ImageItem[] {
+  switch (action.type) {
+    case 'ADD':
+      return [...state, ...action.items]
+    case 'UPDATE':
+      return state.map((item) =>
+        item.id === action.id ? { ...item, ...action.patch } : item,
+      )
+    case 'REMOVE':
+      return state.filter((item) => item.id !== action.id)
+  }
+}
+
+// ── Helpers ───────────────────────────────────────────────────────────────────
+
+function refFromFilename(filename: string): string {
+  const dot = filename.lastIndexOf('.')
+  const base = dot === -1 ? filename : filename.slice(0, dot)
+  // 1. Supprime le suffixe de numérotation "-N" (ex: "151721-2" → "151721", "29679-G-1" → "29679-G")
+  // 2. Supprime les tirets/espaces résiduels en fin (ex: "27228-GRIS-" → "27228-GRIS", "26774-" → "26774")
+  return base.replace(/-\d+$/, '').replace(/[-_\s]+$/, '')
+}
+
+function blobToBase64(blob: Blob): Promise<string> {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader()
+    reader.onload = () => {
+      const result = reader.result as string
+      const base64 = result.split(',')[1]
+      resolve(base64)
+    }
+    reader.onerror = () => reject(new Error('FileReader error'))
+    reader.readAsDataURL(blob)
+  })
+}
+
+// ── Hook ──────────────────────────────────────────────────────────────────────
+
+export function useImages() {
+  const [items, dispatch] = useReducer(reducer, [])
+  const queueRef = useRef(createQueue())
+
+  const update = useCallback((id: string, patch: Partial<ImageItem>) => {
+    dispatch({ type: 'UPDATE', id, patch })
+  }, [])
+
+  // Recherche produit Shopify
+  const searchProduct = useCallback(
+    async (id: string, ref: string) => {
+      update(id, { status: 'searching' })
+      try {
+        const sheetsRes = await fetch(`/api/products/search-sheets?ref=${encodeURIComponent(ref)}`)
+        const sheetsData = await sheetsRes.json()
+        if (sheetsData.found) {
+          update(id, {
+            status: 'converted',
+            shopifyProductId: sheetsData.shopifyId,
+            shopifyProductTitle: sheetsData.title,
+          })
+          return
+        }
+        const res = await fetch(`/api/products/search?ref=${encodeURIComponent(ref)}`)
+        const data = await res.json()
+        if (data.found) {
+          update(id, {
+            status: 'converted',
+            shopifyProductId: data.shopifyId,
+            shopifyProductTitle: data.title,
+          })
+        } else {
+          update(id, { status: 'not_found' })
+        }
+      } catch (err) {
+        update(id, { status: 'error', error: `Recherche produit : ${(err as Error).message}` })
+      }
+    },
+    [update],
+  )
+
+  // Pipeline léger : conversion HEIC + recherche produit (sans détourage IA)
+  const runConvertAndSearch = useCallback(
+    async (id: string, blob: Blob, ref: string) => {
+      const { convertHeicToJpeg } = await import('@/lib/client/heicConverter')
+
+      let jpegBlob = blob
+      if (blob.type === 'image/heic' || blob.type === 'image/heif' || blob.type === '') {
+        try {
+          update(id, { status: 'converting' })
+          jpegBlob = await convertHeicToJpeg(blob)
+          update(id, { originalBlob: jpegBlob })
+        } catch (err) {
+          update(id, { status: 'error', error: `Conversion HEIC : ${(err as Error).message}` })
+          return
+        }
+      } else {
+        update(id, { status: 'searching' })
+      }
+
+      await searchProduct(id, ref)
+    },
+    [update, searchProduct],
+  )
+
+  // Pipeline IA complet : détourage + composite + rotation
+  const runBgRemoval = useCallback(
+    async (id: string, blob: Blob, feather: number, rotation: number, alphaThreshold: number) => {
+      const { removeBackgroundRaw, compositeOnWhite } = await import('@/lib/client/bgRemover')
+      const { rotateBlob } = await import('@/lib/client/imageRotator')
+
+      let rawPng: Blob
+      try {
+        update(id, { status: 'processing', progress: null })
+        rawPng = await removeBackgroundRaw(blob, (p) => update(id, { progress: p }))
+      } catch (err) {
+        update(id, { status: 'error', error: `Détourage IA : ${(err as Error).message}` })
+        return
+      }
+
+      let finalBlob: Blob
+      try {
+        const composited = await compositeOnWhite(rawPng, feather, alphaThreshold)
+        finalBlob = await rotateBlob(composited, rotation)
+      } catch (err) {
+        update(id, { status: 'error', error: `Post-traitement : ${(err as Error).message}` })
+        return
+      }
+
+      update(id, { rawPngBlob: rawPng, processedBlob: finalBlob, status: 'ready' })
+    },
+    [update],
+  )
+
+  // Recomposite rapide (feather, alphaThreshold ou rotation changés) — ne relance pas l'IA
+  const recomposite = useCallback(
+    async (id: string, rawPngBlob: Blob, feather: number, rotation: number, alphaThreshold: number) => {
+      const { compositeOnWhite } = await import('@/lib/client/bgRemover')
+      const { rotateBlob } = await import('@/lib/client/imageRotator')
+      try {
+        const composited = await compositeOnWhite(rawPngBlob, feather, alphaThreshold)
+        const finalBlob = await rotateBlob(composited, rotation)
+        update(id, { processedBlob: finalBlob, feather, rotation, alphaThreshold })
+      } catch (err) {
+        update(id, { status: 'error', error: `Retraitement : ${(err as Error).message}` })
+      }
+    },
+    [update],
+  )
+
+  // ── Actions exposées ───────────────────────────────────────────────────────
+
+  const addFiles = useCallback(
+    async (files: File[]) => {
+      const { readImagesFromZip } = await import('@/lib/client/zipImporter')
+
+      for (const file of files) {
+        if (file.name.toLowerCase().endsWith('.zip')) {
+          const entries = await readImagesFromZip(file)
+          const newItems: ImageItem[] = entries.map((entry) => ({
+            id: crypto.randomUUID(),
+            filename: `${entry.folder}/${entry.filename}.${entry.ext}`,
+            ref: entry.folder,
+            originalBlob: entry.blob,
+            rawPngBlob: null,
+            processedBlob: null,
+            rotation: 0,
+            feather: 2,
+            alphaThreshold: 30,
+            shopifyProductId: null,
+            shopifyProductTitle: null,
+            uploadedUrl: null,
+            status: 'pending' as ImageStatus,
+            error: null,
+            progress: null,
+          }))
+          const itemsWithRef = newItems.map(item => {
+            const basename = item.filename.split('/').pop() ?? item.filename
+            return { ...item, ref: refFromFilename(basename) }
+          })
+          dispatch({ type: 'ADD', items: itemsWithRef })
+          for (const item of itemsWithRef) {
+            queueRef.current.enqueue(() => runConvertAndSearch(item.id, item.originalBlob, item.ref))
+          }
+        } else {
+          const ref = refFromFilename(file.name)
+          const newItem: ImageItem = {
+            id: crypto.randomUUID(),
+            filename: file.name,
+            ref,
+            originalBlob: file,
+            rawPngBlob: null,
+            processedBlob: null,
+            rotation: 0,
+            feather: 2,
+            alphaThreshold: 30,
+            shopifyProductId: null,
+            shopifyProductTitle: null,
+            uploadedUrl: null,
+            status: 'pending',
+            error: null,
+            progress: null,
+          }
+          dispatch({ type: 'ADD', items: [newItem] })
+          queueRef.current.enqueue(() => runConvertAndSearch(newItem.id, newItem.originalBlob, newItem.ref))
+        }
+      }
+    },
+    [runConvertAndSearch],
+  )
+
+  // Lancer le détourage IA sur une image (depuis statut converted ou error)
+  const detour = useCallback(
+    (id: string) => {
+      const item = items.find((i) => i.id === id)
+      if (!item) return
+      queueRef.current.enqueue(() =>
+        runBgRemoval(item.id, item.originalBlob, item.feather, item.rotation, item.alphaThreshold)
+      )
+    },
+    [items, runBgRemoval],
+  )
+
+  // Relancer le pipeline complet (conversion + détourage) sur une image déjà traitée
+  const reprocess = useCallback(
+    (id: string) => {
+      const item = items.find((i) => i.id === id)
+      if (!item) return
+      queueRef.current.enqueue(() =>
+        runBgRemoval(item.id, item.originalBlob, item.feather, item.rotation, item.alphaThreshold)
+      )
+    },
+    [items, runBgRemoval],
+  )
+
+  const setFeather = useCallback(
+    (id: string, value: number) => {
+      const item = items.find((i) => i.id === id)
+      if (!item || !item.rawPngBlob) return
+      recomposite(id, item.rawPngBlob, value, item.rotation, item.alphaThreshold)
+    },
+    [items, recomposite],
+  )
+
+  const setAlphaThreshold = useCallback(
+    (id: string, value: number) => {
+      const item = items.find((i) => i.id === id)
+      if (!item || !item.rawPngBlob) return
+      recomposite(id, item.rawPngBlob, item.feather, item.rotation, value)
+    },
+    [items, recomposite],
+  )
+
+  const rotate = useCallback(
+    (id: string, direction: 'cw' | 'ccw') => {
+      const item = items.find((i) => i.id === id)
+      if (!item || !item.rawPngBlob) return
+      const delta = direction === 'cw' ? 90 : -90
+      const newRotation = ((item.rotation + delta) % 360 + 360) % 360
+      recomposite(id, item.rawPngBlob, item.feather, newRotation, item.alphaThreshold)
+    },
+    [items, recomposite],
+  )
+
+  const uploadOne = useCallback(
+    async (id: string) => {
+      const item = items.find((i) => i.id === id)
+      if (!item) return
+      const canUpload = item.status === 'ready' || item.status === 'converted'
+      if (!canUpload || !item.shopifyProductId) return
+
+      update(id, { status: 'uploading' })
+
+      try {
+        // Si détouré : utilise processedBlob ; sinon : redimensionne à 1000×1000
+        let uploadBlob: Blob
+        if (item.processedBlob) {
+          uploadBlob = item.processedBlob
+        } else {
+          const { resizeToSquare } = await import('@/lib/client/imageResizer')
+          uploadBlob = await resizeToSquare(item.originalBlob)
+        }
+
+        const base64 = await blobToBase64(uploadBlob)
+        const basename = item.filename.split('/').pop()?.replace(/\.[^.]+$/, '') ?? item.ref
+        const filename = `${basename}.jpg`
+
+        const doUpload = async (shopifyProductId: string) =>
+          fetch('/api/images/upload', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ shopifyProductId, imageBase64: base64, filename }),
+          })
+
+        let res = await doUpload(item.shopifyProductId)
+
+        // 404 = ID périmé → relancer la recherche par ref
+        if (res.status === 404) {
+          const searchRes = await fetch(`/api/products/search?ref=${encodeURIComponent(item.ref)}`)
+          const searchData = await searchRes.json()
+          if (searchData.found && searchData.shopifyId) {
+            update(id, { shopifyProductId: searchData.shopifyId, shopifyProductTitle: searchData.title })
+            res = await doUpload(searchData.shopifyId)
+          }
+        }
+
+        const data = await res.json()
+        if (!res.ok) throw new Error(data.error || `HTTP ${res.status}`)
+        update(id, { status: data.skipped ? 'skipped' : 'uploaded', uploadedUrl: data.url })
+      } catch (err) {
+        update(id, { status: 'error', error: `Upload : ${(err as Error).message}` })
+      }
+    },
+    [items, update],
+  )
+
+  const uploadAll = useCallback(async () => {
+    const ready = items.filter((i) => i.status === 'ready' || i.status === 'converted')
+    for (const item of ready) {
+      await uploadOne(item.id)
+      await new Promise(r => setTimeout(r, 500))
+    }
+  }, [items, uploadOne])
+
+  const uploadSelected = useCallback(async (ids: Set<string>) => {
+    const toUpload = items.filter(i =>
+      ids.has(i.id) && (i.status === 'ready' || i.status === 'converted') && !!i.shopifyProductId
+    )
+    for (const item of toUpload) {
+      await uploadOne(item.id)
+      await new Promise(r => setTimeout(r, 500))
+    }
+  }, [items, uploadOne])
+
+  const removeItem = useCallback((id: string) => {
+    dispatch({ type: 'REMOVE', id })
+  }, [])
+
+  const assignProduct = useCallback(
+    (id: string, shopifyProductId: string, shopifyProductTitle: string) => {
+      const item = items.find((i) => i.id === id)
+      const newStatus = item?.processedBlob ? 'ready' : 'converted'
+      update(id, { shopifyProductId, shopifyProductTitle, status: newStatus })
+    },
+    [items, update],
+  )
+
+  return { items, addFiles, setFeather, setAlphaThreshold, rotate, uploadOne, uploadAll, uploadSelected, removeItem, assignProduct, reprocess, detour }
+}

src/lib/client/bannerRenderer.ts

@@ -0,0 +1,236 @@
+// Rendu de bannières homepage sur canvas OffscreenCanvas
+// Format : 1500×500 (paysage, ratio 3:1)
+
+export const BANNER_WIDTH = 1500
+export const BANNER_HEIGHT = 500
+
+export type ColorScheme = 'dark-blue' | 'dark-green' | 'white' | 'red' | 'black'
+
+export const COLOR_SCHEMES: Record<ColorScheme, {
+  label: string
+  bg: string
+  badgeBg: string
+  badgeText: string
+  titleColor: string
+  priceColor: string
+  strikePriceColor: string
+  subtitleColor: string
+}> = {
+  'dark-blue': {
+    label: 'Bleu nuit',
+    bg: '#0f1c3f',
+    badgeBg: '#f0c040',
+    badgeText: '#1a1a1a',
+    titleColor: '#ffffff',
+    priceColor: '#ff7a2f',
+    strikePriceColor: '#8899bb',
+    subtitleColor: '#aabbdd',
+  },
+  'dark-green': {
+    label: 'Vert forêt',
+    bg: '#0f2b1e',
+    badgeBg: '#4caf50',
+    badgeText: '#ffffff',
+    titleColor: '#ffffff',
+    priceColor: '#ffcc00',
+    strikePriceColor: '#7aaa88',
+    subtitleColor: '#99cc99',
+  },
+  'white': {
+    label: 'Blanc',
+    bg: '#ffffff',
+    badgeBg: '#e53935',
+    badgeText: '#ffffff',
+    titleColor: '#1a1a2e',
+    priceColor: '#e53935',
+    strikePriceColor: '#aaaaaa',
+    subtitleColor: '#555566',
+  },
+  'red': {
+    label: 'Rouge',
+    bg: '#b71c1c',
+    badgeBg: '#ffeb3b',
+    badgeText: '#1a1a1a',
+    titleColor: '#ffffff',
+    priceColor: '#ffeb3b',
+    strikePriceColor: '#ff8a80',
+    subtitleColor: '#ffcdd2',
+  },
+  'black': {
+    label: 'Noir',
+    bg: '#111111',
+    badgeBg: '#e0e0e0',
+    badgeText: '#111111',
+    titleColor: '#ffffff',
+    priceColor: '#ffcc00',
+    strikePriceColor: '#666666',
+    subtitleColor: '#aaaaaa',
+  },
+}
+
+function wrapText(
+  ctx: OffscreenCanvasRenderingContext2D,
+  text: string,
+  maxWidth: number,
+): string[] {
+  const words = text.split(' ')
+  const lines: string[] = []
+  let current = ''
+  for (const word of words) {
+    const test = current ? `${current} ${word}` : word
+    if (ctx.measureText(test).width > maxWidth && current) {
+      lines.push(current)
+      current = word
+    } else {
+      current = test
+    }
+  }
+  if (current) lines.push(current)
+  return lines
+}
+
+function roundRect(
+  ctx: OffscreenCanvasRenderingContext2D,
+  x: number, y: number, w: number, h: number, r: number,
+) {
+  ctx.beginPath()
+  ctx.moveTo(x + r, y)
+  ctx.lineTo(x + w - r, y)
+  ctx.quadraticCurveTo(x + w, y, x + w, y + r)
+  ctx.lineTo(x + w, y + h - r)
+  ctx.quadraticCurveTo(x + w, y + h, x + w - r, y + h)
+  ctx.lineTo(x + r, y + h)
+  ctx.quadraticCurveTo(x, y + h, x, y + h - r)
+  ctx.lineTo(x, y + r)
+  ctx.quadraticCurveTo(x, y, x + r, y)
+  ctx.closePath()
+}
+
+export interface BannerConfig {
+  scheme: ColorScheme
+  promoLabel: string    // ex: "Destockage - Durée limitée"
+  title: string         // ex: "PEINTURE FAÇADE PLIOLITE PEF PLIO BLANC MAT CECIL, 10 L"
+  price: string         // ex: "79 €"
+  comparePrice: string  // ex: "119 €" (barré)
+  productImageUrl: string | null
+  backgroundImageBlob?: Blob | null  // image de fond uploadée (remplace la couleur unie)
+}
+
+export async function renderBanner(config: BannerConfig): Promise<Blob> {
+  const W = BANNER_WIDTH
+  const H = BANNER_HEIGHT
+  const canvas = new OffscreenCanvas(W, H)
+  const ctx = canvas.getContext('2d')!
+  const scheme = COLOR_SCHEMES[config.scheme]
+
+  // ── Fond ─────────────────────────────────────────────────────────────────
+  if (config.backgroundImageBlob) {
+    try {
+      const bgImg = await createImageBitmap(config.backgroundImageBlob)
+      // Cover : remplit tout le canvas en centrant
+      const scale = Math.max(W / bgImg.width, H / bgImg.height)
+      const dw = bgImg.width * scale
+      const dh = bgImg.height * scale
+      const dx = (W - dw) / 2
+      const dy = (H - dh) / 2
+      ctx.drawImage(bgImg, dx, dy, dw, dh)
+      bgImg.close()
+      // Overlay semi-transparent pour lisibilité du texte
+      ctx.fillStyle = 'rgba(0,0,0,0.35)'
+      ctx.fillRect(0, 0, W, H)
+    } catch {
+      ctx.fillStyle = scheme.bg
+      ctx.fillRect(0, 0, W, H)
+    }
+  } else {
+    ctx.fillStyle = scheme.bg
+    ctx.fillRect(0, 0, W, H)
+  }
+
+  // Zone texte : 55% gauche, zone image : 45% droite
+  const textZoneW = Math.round(W * 0.55)
+  const imageZoneX = textZoneW
+  const imageZoneW = W - textZoneW
+  const pad = 60
+
+  // ── Image produit ─────────────────────────────────────────────────────────
+  if (config.productImageUrl) {
+    try {
+      const res = await fetch(`/api/images/proxy?url=${encodeURIComponent(config.productImageUrl)}`)
+      const blob = await res.blob()
+      const img = await createImageBitmap(blob)
+
+      // Calcul pour centrer/contenir dans la zone droite avec padding
+      const maxW = imageZoneW - pad * 2
+      const maxH = H - pad * 2
+      const scale = Math.min(maxW / img.width, maxH / img.height)
+      const dw = img.width * scale
+      const dh = img.height * scale
+      const dx = imageZoneX + (imageZoneW - dw) / 2
+      const dy = (H - dh) / 2
+      ctx.drawImage(img, dx, dy, dw, dh)
+      img.close()
+    } catch {
+      // Image non chargeable — on continue sans
+    }
+  }
+
+  // ── Badge promo ───────────────────────────────────────────────────────────
+  let curY = 80
+  if (config.promoLabel.trim()) {
+    ctx.font = 'bold 26px Arial, sans-serif'
+    const badgeText = config.promoLabel.toUpperCase()
+    const metrics = ctx.measureText(badgeText)
+    const bw = metrics.width + 32
+    const bh = 44
+    ctx.fillStyle = scheme.badgeBg
+    roundRect(ctx, pad, curY, bw, bh, 8)
+    ctx.fill()
+    ctx.fillStyle = scheme.badgeText
+    ctx.textBaseline = 'middle'
+    ctx.fillText(badgeText, pad + 16, curY + bh / 2)
+    curY += bh + 28
+  }
+
+  // ── Titre produit ─────────────────────────────────────────────────────────
+  const titleMaxW = textZoneW - pad * 2
+  ctx.font = 'bold 52px Arial, sans-serif'
+  ctx.fillStyle = scheme.titleColor
+  ctx.textBaseline = 'top'
+  const titleLines = wrapText(ctx, config.title, titleMaxW)
+  const displayLines = titleLines.slice(0, 3) // max 3 lignes
+  for (const line of displayLines) {
+    ctx.fillText(line, pad, curY)
+    curY += 60
+  }
+  curY += 16
+
+  // ── Prix ──────────────────────────────────────────────────────────────────
+  if (config.price.trim()) {
+    ctx.font = 'bold 72px Arial, sans-serif'
+    ctx.fillStyle = scheme.priceColor
+    ctx.textBaseline = 'top'
+    ctx.fillText(config.price, pad, curY)
+
+    if (config.comparePrice.trim()) {
+      const priceW = ctx.measureText(config.price).width
+      ctx.font = '36px Arial, sans-serif'
+      ctx.fillStyle = scheme.strikePriceColor
+      const cpText = `Au lieu de ${config.comparePrice}`
+      const cpX = pad + priceW + 20
+      const cpY = curY + 32
+      ctx.fillText(cpText, cpX, cpY)
+
+      // Ligne de barrage
+      const cpW = ctx.measureText(cpText).width
+      ctx.strokeStyle = scheme.strikePriceColor
+      ctx.lineWidth = 2
+      ctx.beginPath()
+      ctx.moveTo(cpX, cpY + 22)
+      ctx.lineTo(cpX + cpW, cpY + 22)
+      ctx.stroke()
+    }
+  }
+
+  return canvas.convertToBlob({ type: 'image/jpeg', quality: 0.95 })
+}

src/lib/client/bgRemover.ts

@@ -0,0 +1,109 @@
+const CDN_URL = 'https://cdn.jsdelivr.net/npm/@imgly/background-removal@1.7.0/dist/index.mjs'
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+let _removeBg: ((blob: Blob, opts: Record<string, unknown>) => Promise<Blob>) | null = null
+
+async function loadLib() {
+  if (_removeBg) return _removeBg
+  const mod = await import(/* webpackIgnore: true */ CDN_URL)
+  _removeBg = mod.removeBackground
+  return _removeBg!
+}
+
+export interface ProgressEvent {
+  key: string
+  percent: number
+}
+
+/**
+ * Supprime le fond d'un Blob image via @imgly IA.
+ * Retourne un PNG avec fond transparent (à combiner avec compositeOnWhite).
+ */
+export async function removeBackgroundRaw(
+  blob: Blob,
+  onProgress?: (e: ProgressEvent) => void,
+): Promise<Blob> {
+  const removeBg = await loadLib()
+  return removeBg(blob, {
+    output: { format: 'image/png', type: 'foreground', quality: 1 },
+    progress: (key: string, current: number, total: number) => {
+      if (onProgress && total > 0) {
+        onProgress({ key, percent: Math.round((current / total) * 100) })
+      }
+    },
+  })
+}
+
+/**
+ * Composite un PNG transparent sur fond blanc avec feather optionnel.
+ * @param pngBlob — PNG avec transparence (résultat de removeBackgroundRaw)
+ * @param feather — récupération des bords en px (0 = strict, 5 = doux)
+ * @param alphaThreshold — pixels avec alpha > seuil deviennent opaques (0 = désactivé, ex: 30 pour récupérer le verre)
+ */
+export function compositeOnWhite(pngBlob: Blob, feather: number, alphaThreshold = 0): Promise<Blob> {
+  const objectUrl = URL.createObjectURL(pngBlob)
+
+  return new Promise((resolve, reject) => {
+    const img = new Image()
+
+    img.onload = () => {
+      const { width, height } = img
+
+      const fgCanvas = document.createElement('canvas')
+      fgCanvas.width = width
+      fgCanvas.height = height
+      const fgCtx = fgCanvas.getContext('2d')!
+
+      fgCtx.drawImage(img, 0, 0)
+
+      // Remonte les pixels semi-transparents (ex: verre) à pleine opacité
+      if (alphaThreshold > 0) {
+        const imageData = fgCtx.getImageData(0, 0, width, height)
+        const data = imageData.data
+        for (let i = 3; i < data.length; i += 4) {
+          if (data[i] > alphaThreshold) data[i] = 255
+        }
+        fgCtx.putImageData(imageData, 0, 0)
+      }
+
+      if (feather > 0) {
+        fgCtx.globalCompositeOperation = 'destination-over'
+        fgCtx.filter = `blur(${feather}px)`
+        fgCtx.drawImage(img, 0, 0)
+        fgCtx.filter = 'none'
+        fgCtx.globalCompositeOperation = 'source-over'
+      }
+
+      // Canvas de sortie 1000×1000 blanc, sujet centré avec padding de 5%
+      const SIZE = 1000
+      const PADDING = 0.05
+      const available = Math.round(SIZE * (1 - PADDING * 2))
+      const scale = Math.min(available / width, available / height)
+      const dw = Math.round(width * scale)
+      const dh = Math.round(height * scale)
+      const dx = Math.round((SIZE - dw) / 2)
+      const dy = Math.round((SIZE - dh) / 2)
+
+      const out = document.createElement('canvas')
+      out.width = SIZE
+      out.height = SIZE
+      const ctx = out.getContext('2d')!
+      ctx.fillStyle = '#ffffff'
+      ctx.fillRect(0, 0, SIZE, SIZE)
+      ctx.drawImage(fgCanvas, dx, dy, dw, dh)
+
+      URL.revokeObjectURL(objectUrl)
+      out.toBlob(
+        (b) => (b ? resolve(b) : reject(new Error('canvas.toBlob a retourné null'))),
+        'image/jpeg',
+        0.92,
+      )
+    }
+
+    img.onerror = () => {
+      URL.revokeObjectURL(objectUrl)
+      reject(new Error('Impossible de charger le PNG'))
+    }
+    img.src = objectUrl
+  })
+}

src/lib/client/heicConverter.ts

@@ -0,0 +1,113 @@
+/**
+ * Convertit un Blob HEIC/HEIF en Blob JPEG.
+ * Tente d'abord la conversion native du navigateur (instantané sur Safari/macOS),
+ * puis repasse sur heic2any si le natif échoue (Chrome, Firefox).
+ * À utiliser uniquement côté client (navigateur).
+ */
+export async function convertHeicToJpeg(blob: Blob): Promise<Blob> {
+  if (!(blob instanceof Blob)) {
+    throw new TypeError("L'entrée doit être un Blob")
+  }
+
+  const type = blob.type.toLowerCase()
+  if (type !== '' && !['image/heic', 'image/heif'].includes(type)) {
+    throw new TypeError(`Format attendu : HEIC/HEIF. Reçu : ${blob.type || '(vide)'}`)
+  }
+
+  // Méthode 1 : conversion native (Safari 14+, macOS Chrome 105+)
+  try {
+    const result = await convertNative(blob)
+    console.log('[heicConverter] ✅ Conversion native réussie')
+    return result
+  } catch (e) {
+    console.warn(`[heicConverter] Conversion native échouée (${(e as Error).message}), repasse sur heic2any…`)
+  }
+
+  // Méthode 2 : conversion serveur via /api/images/convert-heic (sharp, fiable sur tous les navigateurs)
+  try {
+    const result = await convertViaServer(blob)
+    console.log('[heicConverter] ✅ Conversion serveur réussie')
+    return result
+  } catch (e) {
+    console.warn(`[heicConverter] Conversion serveur échouée (${(e as Error).message}), repasse sur heic2any…`)
+  }
+
+  // Méthode 3 : heic2any fallback (plus lent, ~10-30s)
+  const heic2any = (await import('heic2any')).default
+
+  const timeout = new Promise<never>((_, reject) =>
+    setTimeout(
+      () => reject(new Error('Timeout conversion HEIC (30s). Essayez de convertir le fichier en JPG avant de le déposer.')),
+      30_000,
+    ),
+  )
+
+  const conversion = heic2any({ blob, toType: 'image/jpeg', quality: 0.92 })
+  const result = await Promise.race([conversion, timeout])
+  const output = Array.isArray(result) ? result[0] : result
+
+  if (!(output instanceof Blob)) {
+    throw new Error("heic2any n'a pas retourné un Blob")
+  }
+
+  console.log('[heicConverter] ✅ Conversion heic2any réussie')
+  return output
+}
+
+async function convertNative(blob: Blob): Promise<Blob> {
+  const typed = blob.type ? blob : new Blob([blob], { type: 'image/heic' })
+
+  // Tentative 1 : createImageBitmap (Safari 14+)
+  try {
+    const bitmap = await createImageBitmap(typed)
+    const canvas = document.createElement('canvas')
+    canvas.width = bitmap.width
+    canvas.height = bitmap.height
+    canvas.getContext('2d')!.drawImage(bitmap, 0, 0)
+    bitmap.close()
+    return await canvasToBlob(canvas)
+  } catch {
+    // Pas supporté — essai suivant
+  }
+
+  // Tentative 2 : <img> + canvas (Chrome sur macOS — utilise le décodeur HEIC natif de macOS)
+  return new Promise<Blob>((resolve, reject) => {
+    const url = URL.createObjectURL(typed)
+    const img = new Image()
+    img.onload = () => {
+      const canvas = document.createElement('canvas')
+      canvas.width = img.naturalWidth
+      canvas.height = img.naturalHeight
+      canvas.getContext('2d')!.drawImage(img, 0, 0)
+      URL.revokeObjectURL(url)
+      canvasToBlob(canvas).then(resolve).catch(reject)
+    }
+    img.onerror = () => {
+      URL.revokeObjectURL(url)
+      reject(new Error('Décodage HEIC non supporté par ce navigateur'))
+    }
+    img.src = url
+  })
+}
+
+async function convertViaServer(blob: Blob): Promise<Blob> {
+  const formData = new FormData()
+  const file = blob instanceof File ? blob : new File([blob], 'image.heic', { type: 'image/heic' })
+  formData.append('file', file)
+  const res = await fetch('/api/images/convert-heic', { method: 'POST', body: formData })
+  if (!res.ok) {
+    const err = await res.json().catch(() => ({ error: `HTTP ${res.status}` }))
+    throw new Error(err.error ?? `HTTP ${res.status}`)
+  }
+  return res.blob()
+}
+
+function canvasToBlob(canvas: HTMLCanvasElement): Promise<Blob> {
+  return new Promise((resolve, reject) => {
+    canvas.toBlob(
+      b => (b ? resolve(b) : reject(new Error('canvas.toBlob a retourné null'))),
+      'image/jpeg',
+      0.92,
+    )
+  })
+}

src/lib/client/imageResizer.ts

@@ -0,0 +1,15 @@
+export async function resizeToSquare(blob: Blob, size = 1000): Promise<Blob> {
+  const img = await createImageBitmap(blob)
+  const canvas = new OffscreenCanvas(size, size)
+  const ctx = canvas.getContext('2d')!
+  ctx.fillStyle = '#ffffff'
+  ctx.fillRect(0, 0, size, size)
+  const scale = Math.min(size / img.width, size / img.height)
+  const w = img.width * scale
+  const h = img.height * scale
+  const x = (size - w) / 2
+  const y = (size - h) / 2
+  ctx.drawImage(img, x, y, w, h)
+  img.close()
+  return canvas.convertToBlob({ type: 'image/jpeg', quality: 0.92 })
+}

src/lib/client/imageRotator.ts

@@ -0,0 +1,44 @@
+/**
+ * Pivote un Blob JPEG via Canvas.
+ * @param blob — image source (JPEG)
+ * @param degrees — angle en degrés (0, 90, 180, 270)
+ * @returns Blob JPEG pivoté, ou le blob original si degrees === 0
+ */
+export function rotateBlob(blob: Blob, degrees: number): Promise<Blob> {
+  const norm = ((degrees % 360) + 360) % 360
+  if (norm === 0) return Promise.resolve(blob)
+
+  const url = URL.createObjectURL(blob)
+
+  return new Promise((resolve, reject) => {
+    const img = new Image()
+
+    img.onload = () => {
+      const swap = norm === 90 || norm === 270
+      const w = swap ? img.naturalHeight : img.naturalWidth
+      const h = swap ? img.naturalWidth : img.naturalHeight
+
+      const canvas = document.createElement('canvas')
+      canvas.width = w
+      canvas.height = h
+      const ctx = canvas.getContext('2d')!
+
+      ctx.translate(w / 2, h / 2)
+      ctx.rotate((norm * Math.PI) / 180)
+      ctx.drawImage(img, -img.naturalWidth / 2, -img.naturalHeight / 2)
+
+      URL.revokeObjectURL(url)
+      canvas.toBlob(
+        (b) => (b ? resolve(b) : reject(new Error('rotateBlob : toBlob a retourné null'))),
+        'image/jpeg',
+        0.92,
+      )
+    }
+
+    img.onerror = () => {
+      URL.revokeObjectURL(url)
+      reject(new Error('rotateBlob : impossible de charger le blob'))
+    }
+    img.src = url
+  })
+}

src/lib/client/zipImporter.ts

@@ -0,0 +1,47 @@
+import JSZip from 'jszip'
+import type { ZipEntry } from '@/types/images'
+
+const IMAGE_EXTS = new Set(['heic', 'heif', 'jpg', 'jpeg', 'png'])
+
+/**
+ * Extrait toutes les images d'un fichier ZIP.
+ * Structure attendue : dossier-ref/image.ext (le nom du dossier = référence produit).
+ */
+export async function readImagesFromZip(file: File): Promise<ZipEntry[]> {
+  const zip = await JSZip.loadAsync(file)
+
+  const entries: Array<{ relativePath: string; entry: JSZip.JSZipObject }> = []
+  zip.forEach((relativePath, entry) => {
+    if (!entry.dir) entries.push({ relativePath, entry })
+  })
+
+  const results: ZipEntry[] = []
+
+  for (const { relativePath, entry } of entries) {
+    if (relativePath.startsWith('__MACOSX/')) continue
+
+    const parts = relativePath.split('/').filter((p) => p.length > 0)
+    const filename = parts[parts.length - 1]
+    if (filename.startsWith('.')) continue
+
+    const dotIdx = filename.lastIndexOf('.')
+    if (dotIdx === -1) continue
+    const ext = filename.slice(dotIdx + 1).toLowerCase()
+    if (!IMAGE_EXTS.has(ext)) continue
+
+    const folder = parts.length > 1 ? parts[0] : filename.slice(0, dotIdx)
+    const isHeic = ext === 'heic' || ext === 'heif'
+    const mimeType = isHeic
+      ? 'image/heic'
+      : ext === 'jpg' || ext === 'jpeg'
+        ? 'image/jpeg'
+        : 'image/png'
+
+    const rawBlob = await entry.async('blob')
+    const blob = new Blob([rawBlob], { type: mimeType })
+
+    results.push({ folder, filename: filename.slice(0, dotIdx), ext, blob, isHeic })
+  }
+
+  return results
+}

src/lib/creationSheets.test.ts

@@ -0,0 +1,103 @@
+import { parseTabRows, findColIndex, extractSpecificFields } from './creationSheets'
+
+const HEADERS = [
+  'ID', 'Type', 'UGS', 'Nom', 'Publié', 'Mis en avant ?',
+  'Description courte', 'Description longue',
+  'Date de début de promo', 'Date de fin de promo',
+  'État de la TVA', 'Classe de TVA', 'En stock ?',
+  'Stock (en pièce)', 'Vendre individuellement ?',
+  'Prix marché', 'Prix remisé', 'Code ecopart', 'Ecopart montant',
+  'Famille', 'Sous famille',
+  "Classe d'expédition (en retrait, livraison)",
+  'Conditionnement', 'Surface (m2)', 'Poids (kg) fonction unité',
+  'Images', 'Unité', 'Marque', 'Neuf ?',
+  "Commentaire\nexemple : Modèle d'expo (lègères rayures)",
+  'Longueur (cm)', 'Largeur (cm)', 'Hauteur (cm)', 'Épaisseur (cm)',
+  'Poids par carton', 'Stock conditionné (en carton)',
+  'Fabrication', 'Garantie', 'Coloris',
+  'Puissance (AN)', 'Batterie (AP)', 'Couple (AQ)',
+  'PHOTO ?', 'ID FAMILLE', 'ID SOUS FAMILLE',
+]
+
+const makeRow = (overrides: Record<number, string> = {}): string[] => {
+  const base: Record<number, string> = {
+    0: '',          // ID vide = à créer
+    2: 'SKU-001',   // UGS
+    3: 'Perceuse Test',
+    4: '1',         // Publié
+    13: '5',        // Stock
+    15: '99.99',    // Prix marché
+    16: '79.99',    // Prix remisé
+    19: 'OUTILLAGE',
+    24: '2.5',      // Poids
+    27: 'BOSCH',    // Marque
+    39: '1500W',    // Puissance
+    40: 'Li-Ion',   // Batterie
+    // Couple (index 41) laissé vide
+    [HEADERS.length - 2]: '10',   // ID FAMILLE
+    [HEADERS.length - 1]: '20',   // ID SOUS FAMILLE
+  }
+  return HEADERS.map((_, i) => overrides[i] ?? base[i] ?? '')
+}
+
+describe('findColIndex', () => {
+  it('trouve un en-tête exact', () => {
+    expect(findColIndex(HEADERS, 'UGS')).toBe(2)
+  })
+  it('trouve un en-tête commençant par Commentaire', () => {
+    const idx = findColIndex(HEADERS, 'Commentaire')
+    expect(idx).toBeGreaterThan(-1)
+  })
+  it('retourne -1 si non trouvé', () => {
+    expect(findColIndex(HEADERS, 'Inexistant')).toBe(-1)
+  })
+})
+
+describe('extractSpecificFields', () => {
+  it('exclut les colonnes communes', () => {
+    const row = makeRow()
+    const specific = extractSpecificFields(HEADERS, row)
+    expect(Object.keys(specific)).not.toContain('Nom')
+    expect(Object.keys(specific)).not.toContain('UGS')
+  })
+  it('inclut les colonnes spécifiques non vides', () => {
+    const row = makeRow()
+    const specific = extractSpecificFields(HEADERS, row)
+    expect(specific['Puissance (AN)']).toBe('1500W')
+    expect(specific['Batterie (AP)']).toBe('Li-Ion')
+  })
+  it('exclut les colonnes spécifiques vides', () => {
+    const row = makeRow()
+    const specific = extractSpecificFields(HEADERS, row)
+    expect(Object.keys(specific)).not.toContain('Couple (AQ)')
+  })
+})
+
+describe('parseTabRows', () => {
+  it('ignore les lignes avec ID déjà rempli', () => {
+    const row = makeRow({ 0: '12345' })
+    const result = parseTabRows('OUTILLAGE', HEADERS, [row])
+    expect(result).toHaveLength(0)
+  })
+  it('ignore les lignes avec Publié ≠ 1', () => {
+    const row = makeRow({ 4: '0' })
+    const result = parseTabRows('OUTILLAGE', HEADERS, [row])
+    expect(result).toHaveLength(0)
+  })
+  it('retourne un PendingProduct pour une ligne valide', () => {
+    const row = makeRow()
+    const result = parseTabRows('OUTILLAGE', HEADERS, [row])
+    expect(result).toHaveLength(1)
+    expect(result[0].sku).toBe('SKU-001')
+    expect(result[0].title).toBe('Perceuse Test')
+    expect(result[0].priceActual).toBe('79.99')
+    expect(result[0].collectionId).toBe('10')
+    expect(result[0].specificFields['Puissance (AN)']).toBe('1500W')
+  })
+  it('attribue le bon numéro de ligne (1-indexé depuis row 2)', () => {
+    const rows = [makeRow(), makeRow({ 3: 'Deuxième' })]
+    const result = parseTabRows('OUTILLAGE', HEADERS, rows)
+    expect(result[0].rowNumber).toBe(2)
+    expect(result[1].rowNumber).toBe(3)
+  })
+})

src/lib/creationSheets.ts

@@ -0,0 +1,184 @@
+import type { PendingProduct } from '@/types/creation'
+
+const COMMON_HEADERS = new Set([
+  'ID', 'Type', 'UGS', 'Nom', 'Publié', 'Mis en avant ?',
+  'Description courte', 'Description longue',
+  'Date de début de promo', 'Date de fin de promo',
+  'État de la TVA', 'Classe de TVA', 'En stock ?',
+  'Stock (en pièce)', 'Stock (pièce)', 'Stock conditionné', 'Vendre individuellement ?',
+  'Prix marché', 'Prix remisé', 'Code ecopart', 'Ecopart montant',
+  'Famille', 'Sous famille',
+  "Classe d'expédition (en retrait, livraison)",
+  'Conditionnement', 'Poids (kg) fonction unité',
+  'Images', 'Unité', 'Marque', 'Neuf ?', 'PHOTO ?',
+  'ID FAMILLE', 'ID SOUS FAMILLE',
+])
+
+export function findColIndex(headers: string[], search: string): number {
+  const exact = headers.findIndex(h => h === search)
+  if (exact !== -1) return exact
+  return headers.findIndex(h => h.startsWith(search))
+}
+
+export function extractSpecificFields(headers: string[], row: string[]): Record<string, string> {
+  const result: Record<string, string> = {}
+  headers.forEach((header, i) => {
+    if (!header) return
+    const isCommon = COMMON_HEADERS.has(header) || header.startsWith('Commentaire')
+    if (isCommon) return
+    const val = (row[i] ?? '').trim()
+    if (val) result[header] = val
+  })
+  return result
+}
+
+export function parseTabRows(tab: string, headers: string[], rows: string[][], dataStartRow = 2): PendingProduct[] {
+  const idx = {
+    id:              findColIndex(headers, 'ID'),
+    sku:             findColIndex(headers, 'UGS'),
+    nom:             findColIndex(headers, 'Nom'),
+    publie:          findColIndex(headers, 'Publié'),
+    stock:           findColIndex(headers, 'Stock (en pièce)') !== -1 ? findColIndex(headers, 'Stock (en pièce)') : findColIndex(headers, 'Stock (pièce)'),
+    stockConditionne: findColIndex(headers, 'Stock conditionné'),
+    prixMarche:      findColIndex(headers, 'Prix marché'),
+    prixRemise:      findColIndex(headers, 'Prix remisé'),
+    poids:           findColIndex(headers, 'Poids (kg) fonction unité'),
+    marque:          findColIndex(headers, 'Marque'),
+    famille:         findColIndex(headers, 'Famille'),
+    sousFamille:     findColIndex(headers, 'Sous famille'),
+    commentaire:     findColIndex(headers, 'Commentaire'),
+    photo:           findColIndex(headers, 'PHOTO ?'),
+    collectionId:    findColIndex(headers, 'ID FAMILLE'),
+    subCollectionId: findColIndex(headers, 'ID SOUS FAMILLE'),
+  }
+
+  const get = (row: string[], i: number) => (i >= 0 ? (row[i] ?? '').trim() : '')
+
+  return rows
+    .map((row, rowIdx): PendingProduct | null => {
+      const id = get(row, idx.id)
+      const publie = get(row, idx.publie)
+      if (id !== '' || publie !== '1') return null
+      return {
+        tab,
+        rowNumber: dataStartRow + rowIdx,
+        sku: get(row, idx.sku),
+        title: get(row, idx.nom),
+        priceMarket: get(row, idx.prixMarche).replace(',', '.'),
+        priceActual: get(row, idx.prixRemise).replace(',', '.'),
+        stock: parseInt(get(row, idx.stockConditionne) || get(row, idx.stock) || '0', 10) || 0,
+        weightKg: parseFloat(get(row, idx.poids).replace(',', '.') || '0') || 0,
+        vendor: get(row, idx.marque),
+        famille: get(row, idx.famille),
+        sousFamille: get(row, idx.sousFamille),
+        comment: get(row, idx.commentaire),
+        collectionId: get(row, idx.collectionId),
+        subCollectionId: get(row, idx.subCollectionId),
+        hasPhoto: get(row, idx.photo) !== '',
+        specificFields: extractSpecificFields(headers, row),
+      }
+    })
+    .filter((p): p is PendingProduct => p !== null)
+}
+
+/**
+ * Écrit l'ID Shopify en colonne A de la ligne correspondante dans Google Sheets.
+ * Utilise un compte de service avec accès éditeur sur la feuille.
+ */
+export async function writeShopifyIdToSheet(tab: string, rowNumber: number, shopifyId: string): Promise<void> {
+  const sheetId = process.env.GOOGLE_SHEETS_ID
+  const email = process.env.GOOGLE_SERVICE_ACCOUNT_EMAIL
+  const rawKey = process.env.GOOGLE_SERVICE_ACCOUNT_KEY
+  if (!sheetId || !email || !rawKey) return
+
+  // Génère un JWT pour l'authentification Google
+  const privateKey = rawKey.replace(/\\n/g, '\n')
+  const now = Math.floor(Date.now() / 1000)
+  const header = Buffer.from(JSON.stringify({ alg: 'RS256', typ: 'JWT' })).toString('base64url')
+  const payload = Buffer.from(JSON.stringify({
+    iss: email,
+    scope: 'https://www.googleapis.com/auth/spreadsheets',
+    aud: 'https://oauth2.googleapis.com/token',
+    iat: now,
+    exp: now + 3600,
+  })).toString('base64url')
+
+  const { createSign } = await import('crypto')
+  const sign = createSign('RSA-SHA256')
+  sign.update(`${header}.${payload}`)
+  const signature = sign.sign(privateKey, 'base64url')
+  const jwt = `${header}.${payload}.${signature}`
+
+  const tokenRes = await fetch('https://oauth2.googleapis.com/token', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+    body: new URLSearchParams({ grant_type: 'urn:ietf:params:oauth:grant-type:jwt-bearer', assertion: jwt }),
+  })
+  if (!tokenRes.ok) {
+    console.error(`[sheets] token error ${tokenRes.status} for ${tab}!A${rowNumber}`)
+    return
+  }
+  const { access_token } = await tokenRes.json() as { access_token: string }
+
+  const range = encodeURIComponent(`${tab}!A${rowNumber}`)
+  const writeRes = await fetch(
+    `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}/values/${range}?valueInputOption=RAW`,
+    {
+      method: 'PUT',
+      headers: { Authorization: `Bearer ${access_token}`, 'Content-Type': 'application/json' },
+      body: JSON.stringify({ range: `${tab}!A${rowNumber}`, majorDimension: 'ROWS', values: [[shopifyId]] }),
+    },
+  )
+  if (!writeRes.ok) {
+    const txt = await writeRes.text()
+    console.error(`[sheets] write error ${writeRes.status} for ${tab}!A${rowNumber}: ${txt}`)
+  }
+}
+
+export async function fetchPendingProducts(
+  alreadyCreatedRows: Set<string>,
+  tabFilter?: string,
+): Promise<PendingProduct[]> {
+  const apiKey = process.env.GOOGLE_API_KEY
+  const sheetId = process.env.GOOGLE_SHEETS_ID
+  if (!apiKey || !sheetId) throw new Error('GOOGLE_API_KEY et GOOGLE_SHEETS_ID requis')
+
+  let tabs: string[]
+  if (tabFilter) {
+    tabs = [tabFilter]
+  } else {
+    const metaRes = await fetch(
+      `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}?key=${apiKey}&fields=sheets.properties.title`,
+    )
+    if (!metaRes.ok) throw new Error(`Sheets metadata error: ${metaRes.status}`)
+    const meta = await metaRes.json()
+    tabs = (meta.sheets as Array<{ properties: { title: string } }>).map(
+      s => s.properties.title,
+    )
+  }
+
+  const all: PendingProduct[] = []
+  for (const tab of tabs) {
+    const range = encodeURIComponent(`${tab}!A1:BZ`)
+    const res = await fetch(
+      `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}/values/${range}?key=${apiKey}`,
+    )
+    if (!res.ok) continue
+    const data = await res.json()
+    const rows = (data.values ?? []) as string[][]
+    if (rows.length < 2) continue
+    // La ligne d'en-têtes est la première ligne qui contient "ID" en col A
+    // (certains onglets ont une ligne de section en row 1, les vrais en-têtes sont en row 2)
+    const headerRowIdx = rows.findIndex(r => (r[0] ?? '').trim() === 'ID')
+    if (headerRowIdx === -1) continue // pas un onglet produit
+    const headers = rows[headerRowIdx]
+    const dataRows = rows.slice(headerRowIdx + 1)
+    // Ignorer les onglets sans colonne "Publié" (COLLECTIONS, LIVRAISONS, etc.)
+    if (findColIndex(headers, 'Publié') === -1) continue
+    const pending = parseTabRows(tab, headers, dataRows, headerRowIdx + 2).filter(
+      p => !alreadyCreatedRows.has(`${p.tab}:${p.rowNumber}`),
+    )
+    all.push(...pending)
+  }
+  return all
+}

src/lib/googleSheets.ts

@@ -0,0 +1,138 @@
+import type { SyncProduct } from '@/types/sync'
+import { findColIndex, extractSpecificFields } from '@/lib/creationSheets'
+
+function normalizeHandle(ref: string): string {
+  return ref
+    .toLowerCase()
+    .replace(/[^a-z0-9]+/g, '-')
+    .replace(/^-+|-+$/g, '')
+}
+
+function get(row: string[], idx: number): string {
+  return idx >= 0 ? (row[idx] ?? '').trim() : ''
+}
+
+/**
+ * Parse des lignes brutes Google Sheets en SyncProduct[].
+ * La première ligne doit être la ligne d'en-têtes.
+ * Colonnes détectées dynamiquement : UGS, Nom, Prix marché, Stock, Publié
+ */
+export function parseSheetRows(rows: string[][]): SyncProduct[] {
+  if (rows.length === 0) return []
+
+  // Trouver la ligne d'en-têtes : celle qui contient "UGS"
+  const headerRowIndex = rows.findIndex((row) =>
+    row.some((cell) => cell?.trim().toUpperCase() === 'UGS')
+  )
+  if (headerRowIndex < 0) return []
+
+  const headers = rows[headerRowIndex].map((h) => h?.trim() ?? '')
+  const idx = {
+    sku:         findColIndex(headers, 'UGS'),
+    nom:         findColIndex(headers, 'Nom'),
+    prixMarche:  findColIndex(headers, 'Prix marché'),
+    prixRemise:  findColIndex(headers, 'Prix remisé'),
+    stock:       findColIndex(headers, 'Stock (pièce)') !== -1 ? findColIndex(headers, 'Stock (pièce)') : findColIndex(headers, 'Stock (en pièce)'),
+    publie:      findColIndex(headers, 'Publié'),
+    poids:       findColIndex(headers, 'Poids (kg) fonction unité'),
+    marque:      findColIndex(headers, 'Marque'),
+    famille:     findColIndex(headers, 'Famille'),
+    sousFamille: findColIndex(headers, 'Sous famille'),
+    longueur:    findColIndex(headers, 'Longueur'),
+    largeur:     findColIndex(headers, 'Largeur'),
+  }
+
+  // Onglet sans colonne UGS ou Prix marché = onglet non-produit, on skip
+  if (idx.sku < 0 || idx.prixMarche < 0) return []
+
+  return rows.slice(headerRowIndex + 1)
+    .map((row): SyncProduct | null => {
+      const ref = get(row, idx.sku)
+      if (!ref || ref.length < 2) return null
+
+      const rawPrice = get(row, idx.prixMarche).replace(',', '.')
+      const price = parseFloat(rawPrice || '0')
+
+      // Ligne sans prix valide = séparateur ou note, pas un produit
+      if (isNaN(price) || price <= 0) return null
+
+      const publie = get(row, idx.publie).toLowerCase()
+      const status = publie.includes('inac') || publie === 'non' || publie === 'false' ? 'draft' : 'active'
+
+      const rawRemise = get(row, idx.prixRemise).replace(',', '.')
+      const prixRemise = parseFloat(rawRemise || '0')
+      const hasRemise = !isNaN(prixRemise) && prixRemise > 0
+      const longueur = get(row, idx.longueur)
+      const largeur = get(row, idx.largeur)
+      const specificFields = extractSpecificFields(headers, row)
+
+      return {
+        ref,
+        handle: normalizeHandle(ref),
+        title: get(row, idx.nom) || ref,
+        description: '',
+        price: hasRemise ? prixRemise.toFixed(2) : price.toFixed(2),
+        compareAtPrice: hasRemise ? price.toFixed(2) : undefined,
+        stock: parseInt(get(row, idx.stock) || '0', 10) || 0,
+        weightKg: parseFloat(get(row, idx.poids).replace(',', '.') || '0') || undefined,
+        status,
+        prixRemise: hasRemise ? prixRemise.toFixed(2) : undefined,
+        marque: get(row, idx.marque) || undefined,
+        famille: get(row, idx.famille) || undefined,
+        sousFamille: get(row, idx.sousFamille) || undefined,
+        longueur: longueur || undefined,
+        largeur: largeur || undefined,
+        specificFields: Object.keys(specificFields).length > 0 ? specificFields : undefined,
+      }
+    })
+    .filter((p): p is SyncProduct => p !== null)
+}
+
+/**
+ * Lit tous les produits depuis Google Sheets via l'API v4 (API Key publique).
+ * Si GOOGLE_SHEETS_TAB est défini, lit uniquement cet onglet.
+ * Sinon, lit tous les onglets du fichier et combine les produits.
+ * Le fichier Sheets doit être partagé en lecture ("Toute personne avec le lien").
+ */
+export async function readSheetProducts(tab?: string): Promise<SyncProduct[]> {
+  const apiKey = process.env.GOOGLE_API_KEY
+  const sheetId = process.env.GOOGLE_SHEETS_ID
+  const envTab = process.env.GOOGLE_SHEETS_TAB
+
+  if (!apiKey || !sheetId) {
+    throw new Error('Variables GOOGLE_API_KEY et GOOGLE_SHEETS_ID requises')
+  }
+
+  const sheetNames = tab ? [tab] : envTab ? [envTab] : await listSheetTabs(sheetId, apiKey)
+
+  const results = await Promise.all(
+    sheetNames.map((name) => readOneTab(sheetId, apiKey, name)),
+  )
+
+  return results.flat()
+}
+
+async function listSheetTabs(sheetId: string, apiKey: string): Promise<string[]> {
+  const url = `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}?key=${apiKey}&fields=sheets.properties.title`
+  const res = await fetch(url)
+  if (!res.ok) {
+    const err = await res.text()
+    throw new Error(`Google Sheets API error: ${res.status} — ${err}`)
+  }
+  const data = await res.json()
+  return (data.sheets as Array<{ properties: { title: string } }>).map(
+    (s) => s.properties.title,
+  )
+}
+
+async function readOneTab(sheetId: string, apiKey: string, sheetName: string): Promise<SyncProduct[]> {
+  const range = encodeURIComponent(`${sheetName}!A1:AZ`)
+  const url = `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}/values/${range}?key=${apiKey}`
+  const res = await fetch(url)
+  if (!res.ok) {
+    const err = await res.text()
+    throw new Error(`Google Sheets API error (onglet "${sheetName}"): ${res.status} — ${err}`)
+  }
+  const data = await res.json()
+  return parseSheetRows((data.values ?? []) as string[][])
+}

src/lib/mockupTemplates.ts

@@ -0,0 +1,62 @@
+import { readFile, writeFile, mkdir, unlink } from 'fs/promises'
+import { existsSync } from 'fs'
+import path from 'path'
+import { randomUUID } from 'crypto'
+import type { MockupTemplate } from '@/types/mockup'
+
+export const TEMPLATES_DIR = path.join(process.cwd(), 'data', 'mockup-templates')
+const IMAGES_DIR = path.join(TEMPLATES_DIR, 'images')
+const INDEX_PATH = path.join(TEMPLATES_DIR, 'index.json')
+
+async function ensureDirs() {
+  await mkdir(IMAGES_DIR, { recursive: true })
+}
+
+async function readIndex(): Promise<MockupTemplate[]> {
+  if (!existsSync(INDEX_PATH)) return []
+  const raw = await readFile(INDEX_PATH, 'utf-8')
+  return JSON.parse(raw) as MockupTemplate[]
+}
+
+async function writeIndex(templates: MockupTemplate[]): Promise<void> {
+  await ensureDirs()
+  await writeFile(INDEX_PATH, JSON.stringify(templates, null, 2))
+}
+
+export async function listTemplates(): Promise<MockupTemplate[]> {
+  return readIndex()
+}
+
+export async function listTemplatesByFamily(family: string): Promise<MockupTemplate[]> {
+  const all = await readIndex()
+  return all.filter(t => t.family === family)
+}
+
+export async function saveTemplate(
+  meta: Omit<MockupTemplate, 'id'>,
+  imageBuffer: Buffer,
+  ext: string,
+): Promise<MockupTemplate> {
+  await ensureDirs()
+  const id = randomUUID()
+  const filename = `${id}.${ext}`
+  await writeFile(path.join(IMAGES_DIR, filename), imageBuffer)
+  const template: MockupTemplate = { ...meta, id, filename }
+  const all = await readIndex()
+  all.push(template)
+  await writeIndex(all)
+  return template
+}
+
+export async function deleteTemplate(id: string): Promise<void> {
+  const all = await readIndex()
+  const tpl = all.find(t => t.id === id)
+  if (!tpl) throw new Error('Template not found')
+  const filePath = path.join(IMAGES_DIR, tpl.filename)
+  if (existsSync(filePath)) await unlink(filePath)
+  await writeIndex(all.filter(t => t.id !== id))
+}
+
+export function getTemplateImagePath(filename: string): string {
+  return path.join(IMAGES_DIR, filename)
+}

src/lib/openaiClient.test.ts

@@ -0,0 +1,46 @@
+import { generateDescriptions } from './openaiClient'
+
+const mockFetch = jest.fn()
+global.fetch = mockFetch
+
+const mockResponse = (content: string) => ({
+  ok: true,
+  json: async () => ({ choices: [{ message: { content } }] }),
+})
+
+describe('generateDescriptions', () => {
+  beforeEach(() => {
+    process.env.OPENAI_API_KEY = 'sk-test'
+    mockFetch.mockReset()
+  })
+
+  it('retourne shortDesc et longDesc depuis OpenAI', async () => {
+    mockFetch
+      .mockResolvedValueOnce(mockResponse('<p>Description courte</p>'))
+      .mockResolvedValueOnce(mockResponse('<p>Description longue</p>'))
+    const result = await generateDescriptions({
+      title: 'Perceuse', rawDescription: 'Une perceuse', comment: '', vendor: 'BOSCH', famille: 'OUTILLAGE',
+    })
+    expect(result.shortDesc).toBe('<p>Description courte</p>')
+    expect(result.longDesc).toBe('<p>Description longue</p>')
+    expect(mockFetch).toHaveBeenCalledTimes(2)
+  })
+
+  it('lance les deux requêtes en parallèle', async () => {
+    mockFetch.mockResolvedValue(mockResponse('<p>ok</p>'))
+    await generateDescriptions({ title: 'T', rawDescription: '', comment: '', vendor: '', famille: '' })
+    expect(mockFetch).toHaveBeenCalledTimes(2)
+  })
+
+  it('lance une erreur si OPENAI_API_KEY manquant', async () => {
+    delete process.env.OPENAI_API_KEY
+    await expect(generateDescriptions({ title: 'T', rawDescription: '', comment: '', vendor: '', famille: '' }))
+      .rejects.toThrow('OPENAI_API_KEY')
+  })
+
+  it('lance une erreur si la réponse OpenAI est non-ok', async () => {
+    mockFetch.mockResolvedValue({ ok: false, status: 429, text: async () => 'rate limited' })
+    await expect(generateDescriptions({ title: 'T', rawDescription: '', comment: '', vendor: '', famille: '' }))
+      .rejects.toThrow('429')
+  })
+})

src/lib/openaiClient.ts

@@ -0,0 +1,46 @@
+interface DescriptionInput {
+  title: string
+  rawDescription: string
+  comment: string
+  vendor: string
+  famille: string
+}
+
+interface Descriptions {
+  shortDesc: string
+  longDesc: string
+}
+
+async function callOpenAI(prompt: string): Promise<string> {
+  const apiKey = process.env.OPENAI_API_KEY
+  if (!apiKey) throw new Error('OPENAI_API_KEY requis')
+  const res = await fetch('https://api.openai.com/v1/chat/completions', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json', Authorization: `Bearer ${apiKey}` },
+    body: JSON.stringify({ model: 'gpt-4o', messages: [{ role: 'user', content: prompt }], temperature: 0.7 }),
+  })
+  if (!res.ok) {
+    const err = await res.text()
+    throw new Error(`OpenAI API error: ${res.status} — ${err}`)
+  }
+  const data = await res.json()
+  return (data.choices?.[0]?.message?.content ?? '').trim()
+}
+
+function buildPrompt(input: DescriptionInput, length: number): string {
+  return `A partir des caractéristiques suivantes, crée un texte descriptif de ${length} caractères en faisant attention au SEO pour qu'il soit en rapport avec la catégorie ${input.famille} et le produit ${input.title} :
+Nom = ${input.title}
+Description : ${input.rawDescription}
+Commentaire : ${input.comment}
+Marque : ${input.vendor}
+Formate ce texte en HTML.
+Ta réponse doit commencer directement par une balise HTML (comme <p> ou <h1>), sans bloc \`\`\`html, sans aucun mot ou encadré autour.`
+}
+
+export async function generateDescriptions(input: DescriptionInput): Promise<Descriptions> {
+  const [shortDesc, longDesc] = await Promise.all([
+    callOpenAI(buildPrompt(input, 400)),
+    callOpenAI(buildPrompt(input, 1000)),
+  ])
+  return { shortDesc, longDesc }
+}

src/lib/resolutionCache.ts

@@ -0,0 +1,20 @@
+import { readFile, writeFile, mkdir } from 'fs/promises'
+import { join } from 'path'
+import type { MetafieldResolution } from '@/types/creation'
+
+const CACHE_DIR = join(process.cwd(), 'data')
+const CACHE_FILE = join(CACHE_DIR, 'metafield-resolutions.json')
+
+export async function loadResolutionCache(): Promise<Record<string, MetafieldResolution>> {
+  try {
+    const raw = await readFile(CACHE_FILE, 'utf-8')
+    return JSON.parse(raw) as Record<string, MetafieldResolution>
+  } catch {
+    return {}
+  }
+}
+
+export async function saveResolutionCache(cache: Record<string, MetafieldResolution>): Promise<void> {
+  await mkdir(CACHE_DIR, { recursive: true })
+  await writeFile(CACHE_FILE, JSON.stringify(cache, null, 2), 'utf-8')
+}

src/lib/shopify.ts

@@ -0,0 +1,183 @@
+const API_VERSION = '2024-01'
+
+function getConfig() {
+  const domain = process.env.SHOPIFY_STORE_DOMAIN
+  const token = process.env.SHOPIFY_ADMIN_API_TOKEN
+  if (!domain || !token) {
+    throw new Error('SHOPIFY_STORE_DOMAIN et SHOPIFY_ADMIN_API_TOKEN requis')
+  }
+  return {
+    baseUrl: `https://${domain}/admin/api/${API_VERSION}`,
+    headers: {
+      'X-Shopify-Access-Token': token,
+      'Content-Type': 'application/json',
+    },
+  }
+}
+
+export type ShopifyProductResult =
+  | { found: false }
+  | { found: true; shopifyId: string; title: string }
+
+/**
+ * Recherche un produit Shopify par sa référence.
+ * Stratégie : SKU exact → SKU sans suffixe → handle → titre.
+ * Les images peuvent être nommées "30827-dessus.jpg" alors que le SKU est "30827".
+ */
+export async function searchProductByRef(ref: string): Promise<ShopifyProductResult> {
+  const { baseUrl, headers } = getConfig()
+
+  // Recherche par SKU via l'API GraphQL (supporte les SKUs avec tirets, contrairement au REST)
+  const graphqlUrl = `https://${process.env.SHOPIFY_STORE_DOMAIN}/admin/api/${API_VERSION}/graphql.json`
+  const searchBySku = async (sku: string): Promise<ShopifyProductResult> => {
+    const query = `{
+      productVariants(first: 10, query: "sku:${sku.replace(/"/g, '')}") {
+        edges {
+          node {
+            sku
+            product { id legacyResourceId title }
+          }
+        }
+      }
+    }`
+    const res = await fetch(graphqlUrl, {
+      method: 'POST',
+      headers,
+      body: JSON.stringify({ query }),
+    })
+    if (!res.ok) return { found: false }
+    const data = await res.json()
+    const edges = data?.data?.productVariants?.edges ?? []
+    // Cherche le match exact (insensible à la casse) parmi les résultats
+    const match = edges.find((e: { node: { sku: string } }) =>
+      e.node.sku.toLowerCase() === sku.toLowerCase()
+    )
+    if (!match) return { found: false }
+    return {
+      found: true,
+      shopifyId: match.node.product.legacyResourceId,
+      title: match.node.product.title,
+    }
+  }
+
+  // Si le ref se termine par un suffixe purement numérique (ex: "26618-D-1" → "26618-D"),
+  // on essaie d'abord sans ce suffixe pour éviter de matcher un autre produit qui aurait
+  // accidentellement ce SKU complet
+  const withoutNumericSuffix = /[-_]\d+$/.test(ref) ? ref.replace(/[-_]\d+$/, '') : null
+
+  // 1. SKU sans suffixe numérique en priorité (ex: "26618-D-1" → "26618-D")
+  if (withoutNumericSuffix) {
+    const result = await searchBySku(withoutNumericSuffix)
+    if (result.found) return result
+  }
+
+  // 2. SKU exact
+  let result = await searchBySku(ref)
+  if (result.found) return result
+
+  // 3. SKU sans suffixe non-numérique : "30827-dessus" → "30827"
+  const withoutSuffix = ref.replace(/[-_ ][^-_ ]*$/, '')
+  if (withoutSuffix !== ref && withoutSuffix !== withoutNumericSuffix) {
+    result = await searchBySku(withoutSuffix)
+    if (result.found) return result
+  }
+
+  // 3. Fallback handle Shopify
+  const handle = ref.toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/^-+|-+$/g, '')
+  const tryFetch = async (params: string) => {
+    const res = await fetch(`${baseUrl}/products.json?${params}&fields=id,title&limit=1`, { headers })
+    if (!res.ok) return []
+    const data = await res.json()
+    return (data.products ?? []) as Array<{ id: number; title: string }>
+  }
+
+  let products = await tryFetch(`handle=${encodeURIComponent(handle)}`)
+  if (products.length === 0) products = await tryFetch(`title=${encodeURIComponent(ref)}`)
+  if (products.length === 0) return { found: false }
+
+  return { found: true, shopifyId: String(products[0].id), title: products[0].title }
+}
+
+/**
+ * Upload une image (base64) vers un produit Shopify via l'API REST.
+ * @param shopifyProductId — ID numérique du produit (string)
+ * @param imageBase64 — contenu JPEG encodé en base64 (sans le préfixe data:)
+ * @param filename — nom de fichier avec extension (ex: "REF-1042.jpg")
+ */
+/**
+ * Vérifie si une image avec ce nom de fichier existe déjà sur le produit.
+ * Compare le nom de base (sans extension) avec les src des images existantes.
+ */
+export async function productImageExists(
+  shopifyProductId: string,
+  filename: string,
+): Promise<string | null> {
+  const { baseUrl, headers } = getConfig()
+  const res = await fetch(`${baseUrl}/products/${shopifyProductId}/images.json?fields=id,src`, { headers })
+  if (!res.ok) return null
+  const data = await res.json()
+  const images = (data.images ?? []) as Array<{ id: number; src: string }>
+  // Compare le nom de base sans extension (ex: "30827" dans "30827.jpg")
+  const baseName = filename.replace(/\.[^.]+$/, '').toLowerCase()
+  const existing = images.find(img => {
+    const imgFile = img.src.split('/').pop()?.split('?')[0] ?? ''
+    return imgFile.replace(/\.[^.]+$/, '').toLowerCase() === baseName
+  })
+  return existing ? existing.src : null
+}
+
+export async function uploadProductImage(
+  shopifyProductId: string,
+  imageBase64: string,
+  filename: string,
+): Promise<{ url: string; skipped?: boolean }> {
+  const { baseUrl, headers } = getConfig()
+
+  // Vérifie si l'image existe déjà
+  const existingUrl = await productImageExists(shopifyProductId, filename)
+  if (existingUrl) return { url: existingUrl, skipped: true }
+
+  // Retry avec backoff exponentiel (gère le 429 rate limit)
+  const MAX_RETRIES = 4
+  let delay = 1000
+
+  for (let attempt = 0; attempt <= MAX_RETRIES; attempt++) {
+    const res = await fetch(`${baseUrl}/products/${shopifyProductId}/images.json`, {
+      method: 'POST',
+      headers,
+      body: JSON.stringify({ image: { attachment: imageBase64, filename } }),
+    })
+
+    // 409 Conflict = image déjà présente → traiter comme skipped
+    if (res.status === 409) {
+      return { url: `https://placeholder/already-exists/${filename}`, skipped: true }
+    }
+
+    // 429 Too Many Requests → attendre et réessayer
+    if (res.status === 429 && attempt < MAX_RETRIES) {
+      const retryAfter = parseInt(res.headers.get('Retry-After') ?? '0', 10)
+      await new Promise(r => setTimeout(r, retryAfter > 0 ? retryAfter * 1000 : delay))
+      delay *= 2
+      continue
+    }
+
+    if (res.status === 404) {
+      const err = new Error(`Shopify upload error: 404 — product not found`) as Error & { status: number }
+      err.status = 404
+      throw err
+    }
+
+    if (!res.ok) {
+      const body = await res.text()
+      throw new Error(`Shopify upload error: ${res.status} — ${body}`)
+    }
+
+    const data = await res.json()
+    if (!data.image?.src) {
+      throw new Error('Shopify response invalide : champ image.src manquant')
+    }
+    return { url: data.image.src as string }
+  }
+
+  throw new Error('Shopify upload error: trop de tentatives (rate limit persistant)')
+}