feat: set stock and weight on Shopify product creation

- inventory_management: shopify + inventory_levels/set.json pour le stock
- weight/weight_unit sur le variant pour l'expédition

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

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

@@ -79,6 +79,7 @@ export async function POST(req: NextRequest) {
               description: longDesc,
               price: product.priceActual || '0.00',
               stock: product.stock,
+              weightKg: product.weightKg,
               status: 'active',
             })
             if (product.collectionId) await addProductToCollection(shopifyId, product.collectionId)

src/lib/shopifySync.ts

@@ -91,13 +91,23 @@ async function fetchByStatus(status: 'active' | 'draft'): Promise<ShopifyProduct
 export async function createShopifyProduct(product: SyncProduct): Promise<string> {
   const { baseUrl, headers } = getConfig()
 
+  const variant: Record<string, unknown> = {
+    price: product.price,
+    sku: product.ref,
+    inventory_management: 'shopify',
+  }
+  if (product.weightKg != null && product.weightKg > 0) {
+    variant.weight = product.weightKg
+    variant.weight_unit = 'kg'
+  }
+
   const body = {
     product: {
       title: product.title,
       body_html: product.description,
       handle: product.handle,
       status: product.status,
-      variants: [{ price: product.price, sku: product.ref }],
+      variants: [variant],
     },
   }
 
@@ -113,7 +123,35 @@ export async function createShopifyProduct(product: SyncProduct): Promise<string
   }
 
   const data = await res.json()
-  return String(data.product.id)
+  const shopifyId = String(data.product.id)
+  const variantId = String(data.product.variants[0].id)
+
+  // Récupérer le location_id par défaut pour setter le stock
+  if (product.stock > 0) {
+    try {
+      const locRes = await fetch(`${baseUrl}/locations.json`, { headers })
+      if (locRes.ok) {
+        const locData = await locRes.json() as { locations: Array<{ id: number }> }
+        const locationId = locData.locations[0]?.id
+        if (locationId) {
+          await fetch(`${baseUrl}/inventory_levels/set.json`, {
+            method: 'POST',
+            headers,
+            body: JSON.stringify({
+              location_id: locationId,
+              inventory_item_id: data.product.variants[0].inventory_item_id,
+              available: product.stock,
+            }),
+          })
+        }
+      }
+    } catch {
+      // Non bloquant : le produit est créé, le stock peut être corrigé manuellement
+    }
+  }
+
+  void variantId
+  return shopifyId
 }
 
 /**

src/types/sync.ts

@@ -7,7 +7,8 @@ export interface SyncProduct {
   title: string        // colonne B
   description: string  // colonne C (texte brut, stocké en body_html)
   price: string        // colonne D — "29.99" (2 décimales)
-  stock: number        // colonne E — info affichage uniquement (non synchronisé)
+  stock: number        // colonne E
+  weightKg?: number    // poids en kg pour l'expédition
   status: 'active' | 'draft'  // colonne F : "inactif"/"inactif" → draft, tout autre → active
 }