Add delete for Mini payment QRs.

Vendors can remove a payment QR from the show page; stored images are cleaned up and the short link stops resolving.

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

app/Http/Controllers/Mini/PaymentQrController.php

@@ -101,6 +101,17 @@ class PaymentQrController extends Controller
         return back()->with('success', 'Payment QR updated.');
     }
 
+    public function destroy(QrCode $paymentQr): RedirectResponse
+    {
+        $this->authorizePaymentQr($paymentQr);
+
+        $this->manager->delete($paymentQr);
+
+        return redirect()
+            ->route('mini.payment-qrs.index')
+            ->with('success', 'Payment QR deleted.');
+    }
+
     public function preview(QrCode $paymentQr): Response
     {
         $this->authorizePaymentQr($paymentQr);