fix: log errors in writeShopifyIdToSheet and skip 404s in sync-stock

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

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

@@ -1,7 +1,7 @@
 import { NextRequest, NextResponse } from 'next/server'
 import { getServerSession } from 'next-auth'
 import { authOptions } from '@/lib/auth'
-import { fetchPendingProducts, findColIndex } from '@/lib/creationSheets'
+import { findColIndex } from '@/lib/creationSheets'
 import { getConfig } from '@/lib/shopifySync'
 
 export async function POST(req: NextRequest) {
@@ -86,8 +86,13 @@ export async function POST(req: NextRequest) {
           try {
             // Récupérer le variant pour obtenir inventory_item_id
             const pRes = await fetch(`${baseUrl}/products/${shopifyId}.json?fields=variants`, { headers })
+            if (pRes.status === 404) {
+              // Produit supprimé de Shopify, on ignore silencieusement
+              continue
+            }
             if (!pRes.ok) {
-              send({ type: 'error', title, message: `Produit ${shopifyId} introuvable (${pRes.status})` })
+              const msg = `Produit ${shopifyId} erreur (${pRes.status})`
+              send({ type: 'error', title, message: msg })
               errors++
               continue
             }
@@ -121,6 +126,7 @@ export async function POST(req: NextRequest) {
         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()