Fix payment QR preview rendering using inline data URIs.

Match Events/QR Plus pattern so QR images render without a separate authenticated preview URL, and add a styled preview card on the show page.

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

app/Http/Controllers/Mini/PaymentQrController.php

@@ -32,7 +32,14 @@ class PaymentQrController extends Controller
             ->latest()
             ->get();
 
-        return view('mini.payment-qrs.index', ['qrCodes' => $qrCodes]);
+        $previewDataUris = $qrCodes->mapWithKeys(function (QrCode $qr) {
+            return [$qr->id => $this->imageGenerator->previewDataUri($qr)];
+        });
+
+        return view('mini.payment-qrs.index', [
+            'qrCodes' => $qrCodes,
+            'previewDataUris' => $previewDataUris,
+        ]);
     }
 
     public function create(): View
@@ -67,7 +74,12 @@ class PaymentQrController extends Controller
     {
         $this->authorizePaymentQr($paymentQr);
 
-        return view('mini.payment-qrs.show', ['qrCode' => $paymentQr]);
+        $previewDataUri = $this->imageGenerator->previewDataUri($paymentQr);
+
+        return view('mini.payment-qrs.show', [
+            'qrCode' => $paymentQr->fresh(),
+            'previewDataUri' => $previewDataUri,
+        ]);
     }
 
     public function update(Request $request, QrCode $paymentQr): RedirectResponse