Add per-billet sales stats in stats tab

- Calculate sold count and revenue per billet from paid orders
- Display 'Ventes par billet' card between KPIs and orders list

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/Controller/AccountController.php

@@ -392,11 +392,20 @@ class AccountController extends AbstractController
 
         $eventTotalHT = 0;
         $eventTotalSold = 0;
+        $billetStats = [];
         $paidEventOrders = $em->getRepository(BilletBuyer::class)->findBy(['event' => $event, 'status' => BilletBuyer::STATUS_PAID]);
         foreach ($paidEventOrders as $paidOrder) {
             $eventTotalHT += $paidOrder->getTotalHT();
             foreach ($paidOrder->getItems() as $item) {
                 $eventTotalSold += $item->getQuantity();
+                $billetId = $item->getBillet()?->getId();
+                if ($billetId) {
+                    if (!isset($billetStats[$billetId])) {
+                        $billetStats[$billetId] = ['name' => $item->getBilletName(), 'sold' => 0, 'revenue' => 0];
+                    }
+                    $billetStats[$billetId]['sold'] += $item->getQuantity();
+                    $billetStats[$billetId]['revenue'] += $item->getLineTotalHT();
+                }
             }
         }
 
@@ -412,6 +421,7 @@ class AccountController extends AbstractController
             'event_total_ht' => $eventTotalHT / 100,
             'event_total_sold' => $eventTotalSold,
             'event_total_orders' => \count($paidEventOrders),
+            'billet_stats' => $billetStats,
             'search_query' => $searchQuery,
             'breadcrumbs' => [
                 self::BREADCRUMB_HOME,