fix: connect inventory item to location before setting stock on product creation

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

src/lib/shopifySync.ts

@@ -127,27 +127,36 @@ export async function createShopifyProduct(product: SyncProduct): Promise<string
   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`, {
+      const inventoryItemId = data.product.variants[0].inventory_item_id
+      if (locationId && inventoryItemId) {
+        // Connect l'inventory item à la location avant de setter la quantité
+        await fetch(`${baseUrl}/inventory_levels/connect.json`, {
+          method: 'POST',
+          headers,
+          body: JSON.stringify({ location_id: locationId, inventory_item_id: inventoryItemId }),
+        })
+        const setRes = await fetch(`${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,
+            inventory_item_id: inventoryItemId,
+            available: product.stock ?? 0,
           }),
         })
+        if (!setRes.ok) {
+          const errText = await setRes.text()
+          console.error(`[shopify] inventory_levels/set failed: ${setRes.status} — ${errText}`)
         }
       }
-    } catch {
-      // Non bloquant : le produit est créé, le stock peut être corrigé manuellement
     }
+  } catch (err) {
+    console.error('[shopify] stock set error:', err)
   }
 
   void variantId