fix: redirect au lieu de 403 pour les factures non-pending sur la route return

Evite un 403 inutile quand le webhook a déjà complété la facture
avant le redirect client (Stripe, PayPal, Mollie).

Author: FR-MaximeDev

app/Http/Controllers/Front/Billing/PaymentGatewayController.php

@@ -54,7 +54,9 @@ public function return(Request $request, Invoice $invoice, string $gateway)
     {
         try {
             abort_unless($invoice->customer_id === auth('web')->id(), 403);
-            abort_unless($invoice->status === Invoice::STATUS_PENDING, 403);
+            if ($invoice->status !== Invoice::STATUS_PENDING) {
+                return redirect()->route('front.invoices.show', $invoice);
+            }
 
             $gateway = Gateway::where('uuid', $gateway)->first();
             abort_if(! $gateway, 404);