Abo: Kreditkarte aktualisieren (CRM, Portal, Berater-Link) + Admin-Abo-Löschung

- Karten-Update ohne Abbuchung via PAYONE creditcardcheck/pseudocardpan
  (AboPaymentMethodService, CardUpdateResult/CreditCardCheckData-DTOs)
- Eingabe nur durch Abo-Inhaber: CRM- und Portal-Formular + zeitlich
  begrenzter Berater→Kunde-Link (AboCardUpdateLink + Mail)
- Änderungshistorie in user_abo_card_changes, Anzeige im Admin-Abo-Detail
- Admin: Abo löschen (destroy) inkl. Test
- Portal-Fix: myOrderCreate wirft 404 statt TypeError bei ungültiger ID
- VIP-Sichtbarkeitstests für Einmalartikel-Fenster ergänzt
- Enthält bereits die Freeze-Guards für den Stripe-Notbetrieb (Folge-Commit)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app/Exceptions/Handler.php

@@ -3,11 +3,13 @@
 namespace App\Exceptions;
 
 use App\Services\Payment\Payone\Exceptions\PayoneTransportException;
+use Illuminate\Auth\AuthenticationException;
 use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
 use Illuminate\Support\Facades\Log;
 use Illuminate\Support\Facades\Mail;
 use Symfony\Component\ErrorHandler\ErrorRenderer\HtmlErrorRenderer;
 use Symfony\Component\ErrorHandler\Exception\FlattenException;
+use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Exception\HttpException;
 use Throwable;
 
@@ -54,9 +56,9 @@ class Handler extends ExceptionHandler
      * Render an exception into an HTTP response.
      *
      * @param  \Illuminate\Http\Request  $request
-     * @return \Symfony\Component\HttpFoundation\Response
+     * @return Response
      *
-     * @throws \Throwable
+     * @throws Throwable
      */
     public function render($request, Throwable $exception)
     {
@@ -73,9 +75,9 @@ class Handler extends ExceptionHandler
      * Convert an authentication exception into a response.
      *
      * @param  \Illuminate\Http\Request  $request
-     * @return \Symfony\Component\HttpFoundation\Response
+     * @return Response
      */
-    protected function unauthenticated($request, \Illuminate\Auth\AuthenticationException $exception)
+    protected function unauthenticated($request, AuthenticationException $exception)
     {
         if ($request->expectsJson()) {
             return response()->json(['message' => $exception->getMessage()], 401);
@@ -102,7 +104,7 @@ class Handler extends ExceptionHandler
     public function sendEmail(Throwable $exception)
     {
         try {
-            $e = FlattenException::create($exception);
+            $e = FlattenException::createFromThrowable($exception);
             $handler = new HtmlErrorRenderer(true); // boolean, true raises debug flag...
             $css = $handler->getStylesheet();
             $content = $handler->getBody($e);