Correctly calculate the number of days pending for orders

Update the dashboard to use `plannedDate` instead of `createdAt` for calculating days pending in order cards.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: f2b9c241-9fdd-4abd-9041-720afc8b27d6
Replit-Commit-Checkpoint-Type: full_checkpoint

client/src/pages/Dashboard.tsx

@@ -447,8 +447,8 @@ export default function Dashboard() {
           </CardHeader>
           <CardContent className="space-y-3 p-6 max-h-96 overflow-y-auto">
             {pendingOrders.length > 0 ? pendingOrders.map((order: any) => {
-              // Calculer le nombre de jours en attente
-              const orderDate = safeDate(order.createdAt);
+              // Calculer le nombre de jours en attente depuis la date prévue
+              const orderDate = safeDate(order.plannedDate);
               const daysPending = orderDate ? Math.floor((new Date().getTime() - orderDate.getTime()) / (1000 * 60 * 60 * 24)) : 0;
               const isOverdue = daysPending > 10;