Fix: JavaScript ReferenceError behoben und Print-CSS für QR-Codes korrigiert

src/articles.php

@@ -381,6 +381,8 @@ document.addEventListener('DOMContentLoaded', function () {
 
     const collapsedCategories = new Set();
     let currentView = 'list';
+    let currentSortColumn = 'category_name';
+    let currentSortDirection = 'asc';
     
     // Initialize collapsed state based on user setting
     if (collapseDefault) {

src/storage_locations.php

@@ -351,16 +351,21 @@ function printDiv(divId) {
     var originalContents = document.body.innerHTML;
     document.body.innerHTML = `
         <style>
-            body { font-family: sans-serif; }
+            body { font-family: sans-serif; background: none !important; background-color: white !important; }
             .print-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 20px; }
             .print-item { text-align: center; margin-bottom: 20px; page-break-inside: avoid; }
-            p { margin: 0 0 5px 0; font-size: 14px; font-weight: bold; }
+            p { margin: 0 0 5px 0; font-size: 14px; font-weight: bold; color: black !important; }
+            img { display: inline-block !important; }
         </style>
         <div class="print-grid">${printContents}</div>
     `;
-    window.print();
-    document.body.innerHTML = originalContents;
-    window.location.reload(); // Reload to restore event listeners after print
+    
+    // Wait a brief moment to ensure QR code images from the external API are fully loaded before triggering print
+    setTimeout(function() {
+        window.print();
+        document.body.innerHTML = originalContents;
+        window.location.reload(); // Reload to restore event listeners after print
+    }, 500);
 }
 </script>