Fix: Drag & Drop Merge, UI Layouts und Bugfixes (final)

src/manage_packing_list_items.php

@@ -688,6 +688,28 @@ $conn->close();
                 return;
             }
         }
+
+        const isFromBackpack = evt.from.id !== 'table-container' && evt.from.classList.contains('nested-sortable');
+        const isToTable = evt.to.id === 'table-container';
+        if (isFromBackpack && isToTable) {
+            const articleId = itemEl.dataset.articleId;
+            const qtyInput = itemEl.querySelector('.quantity-input');
+            const qty = parseInt(qtyInput ? qtyInput.value : 1, 10);
+
+            const tableContainer = document.getElementById('table-container');
+            const existingEl = Array.from(tableContainer.children).find(el => 
+                el !== itemEl && el.classList.contains('packed-item-container') && String(el.dataset.articleId) === String(articleId)
+            );
+
+            if (existingEl) {
+                const exInput = existingEl.querySelector('.quantity-input');
+                if (exInput) {
+                    exInput.value = parseInt(exInput.value, 10) + qty;
+                }
+                itemEl.remove();
+            }
+        }
+        
         syncListState();
     }
 

src/packing_list_detail.php

@@ -323,8 +323,8 @@ function render_item_row($item, $level, $items_by_parent) {
     <?php endif; ?>
     
     <div class="row">
-        <div class="col-lg-8 mb-4 mb-lg-0">
-            <div class="card h-100">
+        <div class="col-lg-8 mb-4 mb-lg-0 d-flex flex-column">
+            <div class="card flex-grow-1">
                 <div class="card-header"><h5 class="mb-0"><i class="fas fa-box-open me-2"></i>Gepackte Artikel</h5></div>
                 <div class="card-body p-0">
                     <div class="table-responsive">
@@ -629,4 +629,4 @@ document.addEventListener('DOMContentLoaded', function() {
 });
 </script>
 
-<?php require_once 'footer.php'; ?>
+<?php require_once 'footer.php'; ?>hp require_once 'footer.php'; ?>