diff --git a/lib/pages/boxing_detail_page.dart b/lib/pages/boxing_detail_page.dart
index a304eb3..2289f85 100644
--- a/lib/pages/boxing_detail_page.dart
+++ b/lib/pages/boxing_detail_page.dart
@@ -61,14 +61,37 @@ class BoxingDetailPage extends StatelessWidget {
   }
 
   Widget _buildBoxGroup(BuildContext context, BoxDetailData box) {
+    final boxTotalQuantity = box.items.fold<int>(
+      0,
+      (sum, item) => sum + item.quantity,
+    );
+
     return Padding(
       padding: const EdgeInsets.only(bottom: 12),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
-          Text(
-            '箱号 ${box.boxNo}',
-            style: const TextStyle(fontSize: 14, fontWeight: FontWeight.bold),
+          Row(
+            children: [
+              Expanded(
+                child: Text(
+                  '箱号 ${box.boxNo}',
+                  style: const TextStyle(
+                    fontSize: 14,
+                    fontWeight: FontWeight.bold,
+                  ),
+                ),
+              ),
+              Text(
+                '共 $boxTotalQuantity 件',
+                textAlign: TextAlign.right,
+                style: TextStyle(
+                  fontSize: 14,
+                  fontWeight: FontWeight.w600,
+                  color: Theme.of(context).colorScheme.primary,
+                ),
+              ),
+            ],
           ),
           const SizedBox(height: 4),
           Container(
diff --git a/lib/pages/boxing_page.dart b/lib/pages/boxing_page.dart
index 5b075a3..d8c0bde 100644
--- a/lib/pages/boxing_page.dart
+++ b/lib/pages/boxing_page.dart
@@ -102,6 +102,9 @@ class _BoxingPageState extends State<BoxingPage> {
   int? _editingPackedItemId;
   String _editingPackedQuantity = '';
   int? _deletingPackedItemId;
+  int? _editingAssignedItemId;
+  String _editingAssignedQuantity = '';
+  int? _deletingAssignedItemId;
   String? _lastScannedPaichanNo;
   String? _paichanSwitchNotice;
 
@@ -187,6 +190,9 @@ class _BoxingPageState extends State<BoxingPage> {
     _editingPackedItemId = null;
     _editingPackedQuantity = '';
     _deletingPackedItemId = null;
+    _editingAssignedItemId = null;
+    _editingAssignedQuantity = '';
+    _deletingAssignedItemId = null;
     _lastScannedPaichanNo = null;
     _paichanSwitchNotice = null;
     _isSubmitting = false;
@@ -264,6 +270,9 @@ class _BoxingPageState extends State<BoxingPage> {
       _phase = _Phase.scanned;
       _isDuplicateBoxNo = false;
       _editingBox = null;
+      _editingAssignedItemId = null;
+      _editingAssignedQuantity = '';
+      _deletingAssignedItemId = null;
       _statusOverrideText = null;
       if (_mode == BoxingMode.singleCode) {
         _paichanSwitchNotice = null;
@@ -322,7 +331,14 @@ class _BoxingPageState extends State<BoxingPage> {
           _boxNoController.text = boxNoToApply.toString();
         }
         _lastScannedPaichanNo = _paichanNo;
-        _quantityController.text = (_erpQuantity ?? 0).toString();
+        final remaining = _remainingQuantity;
+        if (remaining <= 0) {
+          _quantityController.clear();
+          _statusOverrideText = '该总排号已全部装箱完毕';
+          _statusOverrideDot = StatusDotColor.red;
+          return;
+        }
+        _quantityController.text = remaining.toString();
         _quantityController.selection = TextSelection(
           baseOffset: 0,
           extentOffset: _quantityController.text.length,
@@ -386,6 +402,23 @@ class _BoxingPageState extends State<BoxingPage> {
     return true;
   }
 
+  void _submitFromKeyboard() {
+    if (_canSubmit) {
+      _submit();
+    }
+  }
+
+  void _focusQuantityInput() {
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (!mounted) return;
+      _quantityFocusNode.requestFocus();
+      _quantityController.selection = TextSelection(
+        baseOffset: 0,
+        extentOffset: _quantityController.text.length,
+      );
+    });
+  }
+
   int? get _currentManyToOneBoxNo {
     final boxNo = int.tryParse(_boxNoController.text.trim());
     if (boxNo == null || boxNo <= 0) return null;
@@ -526,6 +559,7 @@ class _BoxingPageState extends State<BoxingPage> {
             );
             _isDuplicateBoxNo = false;
           });
+          _focusQuantityInput();
           _showStatusOverride(
             '请继续完成剩余数量装箱',
             StatusDotColor.green,
@@ -687,11 +721,9 @@ class _BoxingPageState extends State<BoxingPage> {
 
   void _startEditAssigned(CurrentZongpaiBoxData item) {
     setState(() {
-      _editingBox = item;
-      _phase = _Phase.scanned;
-      _boxNoController.text = item.boxNo.toString();
-      _quantityController.text = item.quantity.toString();
-      _isDuplicateBoxNo = false;
+      _editingAssignedItemId = item.boxItemId;
+      _editingAssignedQuantity = item.quantity.toString();
+      _deletingAssignedItemId = null;
       _statusOverrideText = null;
       _statusOverrideDot = null;
     });
@@ -699,13 +731,158 @@ class _BoxingPageState extends State<BoxingPage> {
 
   void _cancelEditAssigned() {
     setState(() {
-      _editingBox = null;
-      _boxNoController.text = ((_lastBoxNo ?? _maxBoxNo) + 1).toString();
-      _quantityController.clear();
-      _isDuplicateBoxNo = false;
+      _editingAssignedItemId = null;
+      _editingAssignedQuantity = '';
     });
   }
 
+  int _maxAssignedQuantity(CurrentZongpaiBoxData item) {
+    final total = _erpQuantity ?? 0;
+    final packedWithoutItem = _packedQuantity - item.quantity;
+    return total - packedWithoutItem;
+  }
+
+  void _refreshSingleCodeNewInput({bool focusQuantity = true}) {
+    _lastBoxNo = _maxBoxNo;
+    _boxNoController.text = (_maxBoxNo + 1).toString();
+    final remaining = _remainingQuantity;
+    if (remaining > 0) {
+      _quantityController.text = remaining.toString();
+      _quantityController.selection = TextSelection(
+        baseOffset: 0,
+        extentOffset: _quantityController.text.length,
+      );
+      if (focusQuantity) {
+        _focusQuantityInput();
+      }
+    } else {
+      _quantityController.clear();
+    }
+    _isDuplicateBoxNo = false;
+  }
+
+  Future<void> _saveAssignedItem(CurrentZongpaiBoxData item) async {
+    final quantity = int.tryParse(_editingAssignedQuantity);
+    if (quantity == null || quantity <= 0) {
+      _showStatusOverride(
+        '请输入有效数量',
+        StatusDotColor.red,
+        const Duration(seconds: 2),
+      );
+      return;
+    }
+    if (quantity > _maxAssignedQuantity(item)) {
+      _showStatusOverride(
+        '超出可装数量上限',
+        StatusDotColor.red,
+        const Duration(seconds: 2),
+      );
+      return;
+    }
+
+    final configService = AppConfigService();
+    final baseUrl = await configService.getString('api_url') ?? '';
+    if (baseUrl.isEmpty) {
+      _showStatusOverride(
+        '未配置 API 地址，请前往设置',
+        StatusDotColor.red,
+        const Duration(seconds: 2),
+      );
+      return;
+    }
+
+    setState(() => _isSubmitting = true);
+    final result = await _apiService.updateBoxRecord(
+      baseUrl: baseUrl,
+      boxItemId: item.boxItemId,
+      boxNo: item.boxNo,
+      quantity: quantity,
+    );
+    if (!mounted) return;
+
+    setState(() => _isSubmitting = false);
+    if (result.success) {
+      setState(() {
+        _currentZongpaiBoxes = _currentZongpaiBoxes.map((box) {
+          if (box.boxItemId != item.boxItemId) return box;
+          return CurrentZongpaiBoxData(
+            boxItemId: box.boxItemId,
+            boxNo: box.boxNo,
+            quantity: quantity,
+          );
+        }).toList();
+        _replaceExistingBoxItem(item, item.boxNo, quantity);
+        _editingAssignedItemId = null;
+        _editingAssignedQuantity = '';
+        _refreshSingleCodeNewInput();
+      });
+      _showStatusOverride(
+        '修改成功',
+        StatusDotColor.green,
+        const Duration(milliseconds: 1500),
+      );
+    } else {
+      final dot = result.isDuplicate
+          ? StatusDotColor.amber
+          : StatusDotColor.red;
+      _showStatusOverride(
+        result.errorMessage ?? '修改失败',
+        dot,
+        const Duration(seconds: 2),
+      );
+    }
+  }
+
+  Future<void> _deleteAssignedItem(CurrentZongpaiBoxData item) async {
+    final configService = AppConfigService();
+    final baseUrl = await configService.getString('api_url') ?? '';
+    if (baseUrl.isEmpty) {
+      _showStatusOverride(
+        '未配置 API 地址，请前往设置',
+        StatusDotColor.red,
+        const Duration(seconds: 2),
+      );
+      return;
+    }
+
+    setState(() => _isSubmitting = true);
+    final result = await _apiService.deleteBoxRecord(
+      baseUrl: baseUrl,
+      boxItemId: item.boxItemId,
+    );
+    if (!mounted) return;
+
+    setState(() {
+      _isSubmitting = false;
+      if (result.success) {
+        _currentZongpaiBoxes = _currentZongpaiBoxes
+            .where((box) => box.boxItemId != item.boxItemId)
+            .toList();
+        _removeExistingBoxItem(item.boxItemId);
+        if (_editingAssignedItemId == item.boxItemId) {
+          _editingAssignedItemId = null;
+          _editingAssignedQuantity = '';
+        }
+        _deletingAssignedItemId = null;
+        _refreshSingleCodeNewInput();
+      }
+    });
+
+    if (result.success) {
+      _showStatusOverride(
+        '删除成功',
+        StatusDotColor.green,
+        const Duration(milliseconds: 1500),
+      );
+    } else {
+      _showStatusOverride(
+        result.errorMessage ?? '删除失败',
+        StatusDotColor.red,
+        const Duration(seconds: 2),
+      );
+    }
+  }
+
   void _startEditPackedItem(_ManyToOnePackedItem item) {
     setState(() {
       _editingPackedItemId = item.boxItemId;
@@ -1123,43 +1300,132 @@ class _BoxingPageState extends State<BoxingPage> {
           style: TextStyle(fontSize: 13, color: Colors.black54),
         ),
         const SizedBox(height: 6),
-        ..._currentZongpaiBoxes.map((item) {
-          final editing = _editingBox?.boxItemId == item.boxItemId;
-          return Container(
-            margin: const EdgeInsets.only(bottom: 6),
-            decoration: BoxDecoration(
-              color: editing ? Colors.blue.shade50 : Colors.grey.shade50,
-              border: Border.all(
-                color: editing ? Colors.blue : Colors.grey.shade300,
-              ),
-              borderRadius: BorderRadius.circular(6),
-            ),
-            child: ListTile(
-              dense: true,
-              contentPadding: const EdgeInsets.only(left: 10, right: 4),
-              onTap: () => _startEditAssigned(item),
-              title: Text(
-                '${item.boxNo}号箱 / 数量 ${item.quantity}',
-                style: TextStyle(
-                  fontSize: 14,
-                  fontWeight: editing ? FontWeight.w700 : FontWeight.w500,
+        ..._currentZongpaiBoxes.map(_buildAssignedBoxRow),
+      ],
+    );
+  }
+
+  Widget _buildAssignedBoxRow(CurrentZongpaiBoxData item) {
+    final editing = _editingAssignedItemId == item.boxItemId;
+    final deleting = _deletingAssignedItemId == item.boxItemId;
+    return Container(
+      margin: const EdgeInsets.only(bottom: 6),
+      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 6),
+      decoration: BoxDecoration(
+        color: editing ? Colors.orange.shade50 : Colors.grey.shade50,
+        border: Border.all(
+          color: editing ? Colors.orange : Colors.grey.shade300,
+        ),
+        borderRadius: BorderRadius.circular(6),
+      ),
+      child: Column(
+        children: [
+          Row(
+            children: [
+              Expanded(
+                child: Text(
+                  '${item.boxNo}号箱',
+                  style: const TextStyle(
+                    fontSize: 13,
+                    fontWeight: FontWeight.w600,
+                  ),
+                  overflow: TextOverflow.ellipsis,
                 ),
               ),
-              trailing: Row(
-                mainAxisSize: MainAxisSize.min,
+              if (editing)
+                SizedBox(
+                  width: 56,
+                  height: 32,
+                  child: TextField(
+                    keyboardType: TextInputType.none,
+                    inputFormatters: [FilteringTextInputFormatter.digitsOnly],
+                    textAlign: TextAlign.center,
+                    controller:
+                        TextEditingController(text: _editingAssignedQuantity)
+                          ..selection = TextSelection.collapsed(
+                            offset: _editingAssignedQuantity.length,
+                          ),
+                    onChanged: (value) => _editingAssignedQuantity = value,
+                    onEditingComplete: () {},
+                    onSubmitted: (_) => _saveAssignedItem(item),
+                    decoration: const InputDecoration(
+                      contentPadding: EdgeInsets.symmetric(horizontal: 6),
+                      border: OutlineInputBorder(),
+                    ),
+                  ),
+                )
+              else
+                Text(
+                  '数量 ${item.quantity}',
+                  style: const TextStyle(fontSize: 13),
+                ),
+              const SizedBox(width: 4),
+              if (editing) ...[
+                IconButton(
+                  tooltip: '保存',
+                  visualDensity: VisualDensity.compact,
+                  icon: const Icon(Icons.check, size: 18),
+                  onPressed: _isSubmitting
+                      ? null
+                      : () => _saveAssignedItem(item),
+                ),
+                IconButton(
+                  tooltip: '取消',
+                  visualDensity: VisualDensity.compact,
+                  icon: const Icon(Icons.close, size: 18),
+                  onPressed: _isSubmitting ? null : _cancelEditAssigned,
+                ),
+              ] else ...[
+                IconButton(
+                  tooltip: '修改',
+                  visualDensity: VisualDensity.compact,
+                  icon: const Icon(Icons.edit, size: 18),
+                  onPressed: _isSubmitting
+                      ? null
+                      : () => _startEditAssigned(item),
+                ),
+                IconButton(
+                  tooltip: '删除',
+                  visualDensity: VisualDensity.compact,
+                  icon: const Icon(Icons.delete_outline, size: 18),
+                  onPressed: _isSubmitting
+                      ? null
+                      : () {
+                          setState(() {
+                            _deletingAssignedItemId = item.boxItemId;
+                            _editingAssignedItemId = null;
+                            _editingAssignedQuantity = '';
+                          });
+                        },
+                ),
+              ],
+            ],
+          ),
+          if (deleting)
+            Padding(
+              padding: const EdgeInsets.only(top: 4),
+              child: Row(
                 children: [
-                  IconButton(
-                    tooltip: '修改',
-                    visualDensity: VisualDensity.compact,
-                    icon: const Icon(Icons.edit, size: 18),
-                    onPressed: () => _startEditAssigned(item),
+                  const Expanded(
+                    child: Text('确认删除此条记录？', style: TextStyle(fontSize: 13)),
+                  ),
+                  TextButton(
+                    onPressed: _isSubmitting
+                        ? null
+                        : () => _deleteAssignedItem(item),
+                    child: const Text('是'),
+                  ),
+                  TextButton(
+                    onPressed: _isSubmitting
+                        ? null
+                        : () => setState(() => _deletingAssignedItemId = null),
+                    child: const Text('否'),
                   ),
                 ],
               ),
             ),
-          );
-        }),
-      ],
+        ],
+      ),
     );
   }
 
@@ -1206,6 +1472,8 @@ class _BoxingPageState extends State<BoxingPage> {
                 keyboardType: TextInputType.none,
                 inputFormatters: [FilteringTextInputFormatter.digitsOnly],
                 textAlign: TextAlign.center,
+                onEditingComplete: () {},
+                onSubmitted: (_) => _submitFromKeyboard(),
                 decoration: InputDecoration(
                   contentPadding: EdgeInsets.zero,
                   border: OutlineInputBorder(
@@ -1474,6 +1742,8 @@ class _BoxingPageState extends State<BoxingPage> {
                   keyboardType: TextInputType.none,
                   inputFormatters: [FilteringTextInputFormatter.digitsOnly],
                   onChanged: (_) => setState(() {}),
+                  onEditingComplete: () {},
+                  onSubmitted: (_) => _submitFromKeyboard(),
                   decoration: InputDecoration(
                     contentPadding: const EdgeInsets.symmetric(horizontal: 10),
                     border: const OutlineInputBorder(),
@@ -1722,6 +1992,8 @@ class _BoxingPageState extends State<BoxingPage> {
                   keyboardType: TextInputType.none,
                   inputFormatters: [FilteringTextInputFormatter.digitsOnly],
                   onChanged: (_) => _checkDuplicateBoxNo(),
+                  onEditingComplete: () {},
+                  onSubmitted: (_) => _submitFromKeyboard(),
                   decoration: InputDecoration(
                     contentPadding: const EdgeInsets.symmetric(horizontal: 10),
                     border: const OutlineInputBorder(),
@@ -1763,6 +2035,8 @@ class _BoxingPageState extends State<BoxingPage> {
                   keyboardType: TextInputType.none,
                   inputFormatters: [FilteringTextInputFormatter.digitsOnly],
                   onChanged: (_) => setState(() {}),
+                  onEditingComplete: () {},
+                  onSubmitted: (_) => _submitFromKeyboard(),
                   decoration: InputDecoration(
                     contentPadding: const EdgeInsets.symmetric(horizontal: 10),
                     border: const OutlineInputBorder(),