Abo Einmalprodukte: Phase 4 - Ausfuehrung, Purge & User-Retry

- UserMakeOrder: bestaetigte Einmal-Artikel in den Yard, is_abo_addon
  auf ShoppingOrderItem; amount bleibt reiner Abo-Betrag (Reihenfolge)
- AboOneTimeService::purgeAfterExecution: loescht alle Einmal-Artikel
  und rechnet Comp-Produkte neu - nur im Erfolgszweig (Cron + Retry)
- User-Retry in Sales Center und Portal mit Berechtigungspruefung,
  gemeinsames Confirm-Modal; Admin-Retry unveraendert
- Tests: AboMakeOrderOneTimeTest, AboUserRetryTest; Plan-Doku Phase 4

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Http/Controllers/User/AboController.php

@@ -12,6 +12,7 @@ use App\Repositories\AboRepository;
 use App\Services\AboHelper;
 use App\Services\AboItemHistoryService;
 use App\Services\AboOrderCart;
+use App\Services\AboRetryPaymentService;
 use App\Services\Shop;
 use App\User;
 use Request;
@@ -507,6 +508,18 @@ class AboController extends Controller
             ->make(true);
     }
 
+    public function retryPayment($view, $id, AboRetryPaymentService $retryPaymentService)
+    {
+        $user_abo = UserAbo::findOrFail($id);
+        $this->checkPermissions($view, $user_abo);
+
+        $result = $retryPaymentService->retry($user_abo);
+
+        \Session()->flash($result['success'] ? 'alert-success' : 'alert-error', $result['message']);
+
+        return redirect(route('user_abos_detail', [$view, $id]));
+    }
+
     private function checkPermissions($view, $user_abo)
     {
         \Log::info('checkPermissions', ['view' => $view, 'user_abo' => $user_abo]);