Fix remaining merchant surfaces still using merchant.ladill.com/q URLs.

Storefront QR cards, slug preview, payment callbacks, and document downloads now use LadillLink so displayed and encoded links match ladl.link.

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

app/Http/Controllers/Qr/QrCodeController.php

@@ -312,7 +312,7 @@ class QrCodeController extends Controller
             }
         }
 
-        $png = $this->imageGenerator->renderPng(QrCode::publicBaseUrl() . '/q/' . $shortCode, $style);
+        $png = $this->imageGenerator->renderPng(\App\Support\LadillLink::url($shortCode), $style);
 
         if ($tempLogoPath) {
             Storage::disk('qr')->delete($tempLogoPath);