Improve invoice sending by proxying through backend

Replaces direct webhook calls for invoice sending with a backend API endpoint, utilizing multer for file uploads and form-data for robust data transmission. Includes improved error handling and logging.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 1e4433b5-47ab-464c-b663-fea2e53367dd
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: e89da884-7d51-4b3d-8af5-22493ce6f2c1
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/1957c339-2757-4d1f-8e92-e9f71a1ce58e/1e4433b5-47ab-464c-b663-fea2e53367dd/qOJ89TE

client/src/pages/BLReconciliation.tsx

@@ -515,26 +515,25 @@ export default function BLReconciliation() {
     try {
       const formData = new FormData();
       formData.append('file', selectedFile);
+      formData.append('webhookUrl', selectedDeliveryForInvoice.group.webhookUrl);
       formData.append('supplier', selectedDeliveryForInvoice.supplier?.name || '');
       formData.append('blNumber', selectedDeliveryForInvoice.blNumber || '');
       formData.append('type', 'Facture');
 
-      // Créer un AbortController pour gérer le timeout
-      const controller = new AbortController();
-      const timeoutId = setTimeout(() => controller.abort(), 60000); // 60 secondes
-
-      const response = await fetch(selectedDeliveryForInvoice.group.webhookUrl, {
+      // Envoyer via notre route backend proxy (évite problèmes CORS et erreurs webhook)
+      const response = await fetch('/api/reconciliation/send-invoice', {
         method: 'POST',
         body: formData,
-        signal: controller.signal,
+        credentials: 'include' // Important pour l'authentification
       });
 
-      clearTimeout(timeoutId);
-
       if (!response.ok) {
-        throw new Error(`Erreur ${response.status}: ${response.statusText}`);
+        const errorData = await response.json().catch(() => ({}));
+        throw new Error(errorData.error || `Erreur ${response.status}: ${response.statusText}`);
       }
 
+      const result = await response.json();
+
       handleCloseWaitingModal();
       
       toast({