Change QR code output to SVG to avoid GD dependency; fix permissions for uploads

src/Controllers/ItemController.php

@@ -171,13 +171,11 @@ class ItemController
             mkdir($qrDir, 0755, true);
         }
         $options = new QROptions([
-            'outputType' => QRCode::OUTPUT_IMAGE_PNG,
+            'outputType' => QRCode::OUTPUT_MARKUP_SVG,
             'eccLevel' => QRCode::ECC_L,
-            'imageTransparent' => false,
-            'imageBase64' => false,
         ]);
         $qrCode = new QRCode($options);
-        $qrCode->render($idCode, $qrDir . $idCode . '.png');
+        $qrCode->render($idCode, $qrDir . $idCode . '.svg');
     }
 
     public static function printQR($id) {

templates/print_qr.twig

@@ -17,7 +17,7 @@
     <div class="qr-container">
         <h2>{{ item.name }}</h2>
         <p>ID Code: {{ item.id_code }}</p>
-        <img src="/uploads/qr/{{ item.id_code }}.png" alt="QR Code" class="qr-code">
+        <img src="/uploads/qr/{{ item.id_code }}.svg" alt="QR Code" class="qr-code">
         <div class="details">
             <p><strong>Description:</strong> {{ item.description }}</p>
             <p><strong>Category:</strong> {{ item.category_path ?: 'Uncategorized' }}</p>