diff --git a/lib/pages/boxing_page.dart b/lib/pages/boxing_page.dart
index 616040c..194226a 100644
--- a/lib/pages/boxing_page.dart
+++ b/lib/pages/boxing_page.dart
@@ -85,6 +85,7 @@ class BoxingPage extends StatefulWidget {
 
 class _BoxingPageState extends State<BoxingPage> with WidgetsBindingObserver {
   static const _androidKeyCodeButtonR1 = 103;
+  static const _androidKeyCodeButtonL2 = 104;
 
   final _scannerService = ScannerService();
   final _apiService = ApiService();
@@ -194,6 +195,12 @@ class _BoxingPageState extends State<BoxingPage> with WidgetsBindingObserver {
     if (_isModeSwitchKey(event)) {
       _cycleMode();
     }
+    if (_isFinishBoxKey(event)) {
+      final hasItems = _visibleManyToOnePackedItems.isNotEmpty;
+      if (hasItems && _mode == BoxingMode.multiCode) {
+        _finishManyToOneBox();
+      }
+    }
   }
 
   bool _isModeSwitchKey(KeyEvent event) {
@@ -203,6 +210,12 @@ class _BoxingPageState extends State<BoxingPage> with WidgetsBindingObserver {
         _androidKeyCodeFromLogicalKey(key) == _androidKeyCodeButtonR1;
   }
 
+  bool _isFinishBoxKey(KeyEvent event) {
+    final key = event.logicalKey;
+    return key == LogicalKeyboardKey.gameButtonLeft2 ||
+        _androidKeyCodeFromLogicalKey(key) == _androidKeyCodeButtonL2;
+  }
+
   int? _androidKeyCodeFromLogicalKey(LogicalKeyboardKey key) {
     final keyId = key.keyId;
     const androidPlane = LogicalKeyboardKey.androidPlane;
@@ -2504,35 +2517,7 @@ class _BoxingPageState extends State<BoxingPage> with WidgetsBindingObserver {
         mainAxisSize: MainAxisSize.min,
         children: [
           _buildManyToOneScanBar(hasScan),
-          _buildManyToOneSubmitRow(hasScan),
-          Padding(
-            padding: const EdgeInsets.fromLTRB(12, 6, 12, 8),
-            child: SizedBox(
-              width: double.infinity,
-              height: 36,
-              child: OutlinedButton(
-                onPressed: hasItems ? _finishManyToOneBox : null,
-                style: OutlinedButton.styleFrom(
-                  shape: RoundedRectangleBorder(
-                    borderRadius: BorderRadius.circular(8),
-                  ),
-                  side: BorderSide(
-                    color: hasItems
-                        ? Colors.grey.shade600
-                        : Colors.grey.shade300,
-                  ),
-                ),
-                child: Text(
-                  '完成本箱',
-                  style: TextStyle(
-                    fontSize: 14,
-                    fontWeight: FontWeight.w700,
-                    color: hasItems ? Colors.black87 : Colors.grey.shade400,
-                  ),
-                ),
-              ),
-            ),
-          ),
+          _buildManyToOneSubmitRow(hasScan, hasItems),
         ],
       ),
     );
@@ -2586,93 +2571,154 @@ class _BoxingPageState extends State<BoxingPage> with WidgetsBindingObserver {
     );
   }
 
-  Widget _buildManyToOneSubmitRow(bool hasScan) {
+  Widget _buildManyToOneSubmitRow(bool hasScan, bool hasItems) {
     return Padding(
-      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 7),
+      padding: const EdgeInsets.fromLTRB(12, 7, 12, 8),
       child: Row(
         crossAxisAlignment: CrossAxisAlignment.center,
         children: [
-          Text(
-            '数量',
-            style: TextStyle(
-              fontSize: 11,
-              fontWeight: FontWeight.w600,
-              color: hasScan ? Colors.black54 : Colors.grey.shade400,
-            ),
-          ),
-          const SizedBox(width: 6),
+          // Left half: quantity label + input + confirm
           Expanded(
-            child: SizedBox(
-              height: 34,
-              child: TextField(
-                controller: _quantityController,
-                focusNode: _quantityFocusNode,
-                enabled: hasScan && !_isSubmitting,
-                keyboardType: TextInputType.none,
-                inputFormatters: [FilteringTextInputFormatter.digitsOnly],
-                onChanged: (_) => setState(() {}),
-                onEditingComplete: () {},
-                onSubmitted: (_) => _submitFromKeyboard(),
-                decoration: InputDecoration(
-                  contentPadding: const EdgeInsets.symmetric(horizontal: 10),
-                  border: OutlineInputBorder(
-                    borderRadius: BorderRadius.circular(6),
+            flex: 1,
+            child: Row(
+              crossAxisAlignment: CrossAxisAlignment.center,
+              children: [
+                Text(
+                  '数量',
+                  style: TextStyle(
+                    fontSize: 11,
+                    fontWeight: FontWeight.w600,
+                    color: hasScan ? Colors.black54 : Colors.grey.shade400,
                   ),
-                  enabledBorder: OutlineInputBorder(
-                    borderRadius: BorderRadius.circular(6),
-                    borderSide: BorderSide(
-                      color: _quantityTooHigh
-                          ? Colors.red
-                          : Colors.grey.shade300,
+                ),
+                const SizedBox(width: 6),
+                Expanded(
+                  child: SizedBox(
+                    height: 34,
+                    child: TextField(
+                      controller: _quantityController,
+                      focusNode: _quantityFocusNode,
+                      enabled: hasScan && !_isSubmitting,
+                      keyboardType: TextInputType.none,
+                      inputFormatters: [FilteringTextInputFormatter.digitsOnly],
+                      onChanged: (_) => setState(() {}),
+                      onEditingComplete: () {},
+                      onSubmitted: (_) => _submitFromKeyboard(),
+                      decoration: InputDecoration(
+                        contentPadding: const EdgeInsets.symmetric(horizontal: 10),
+                        border: OutlineInputBorder(
+                          borderRadius: BorderRadius.circular(6),
+                        ),
+                        enabledBorder: OutlineInputBorder(
+                          borderRadius: BorderRadius.circular(6),
+                          borderSide: BorderSide(
+                            color: _quantityTooHigh
+                                ? Colors.red
+                                : Colors.grey.shade300,
+                          ),
+                        ),
+                        disabledBorder: OutlineInputBorder(
+                          borderRadius: BorderRadius.circular(6),
+                          borderSide: BorderSide(color: Colors.grey.shade200),
+                        ),
+                        filled: !hasScan,
+                        fillColor: Colors.grey.shade100,
+                      ),
+                      style: const TextStyle(
+                        fontSize: 15,
+                        fontWeight: FontWeight.w600,
+                      ),
                     ),
                   ),
-                  disabledBorder: OutlineInputBorder(
-                    borderRadius: BorderRadius.circular(6),
-                    borderSide: BorderSide(color: Colors.grey.shade200),
+                ),
+                const SizedBox(width: 8),
+                SizedBox(
+                  height: 34,
+                  child: ElevatedButton(
+                    onPressed: _canSubmit ? _submit : null,
+                    style: ElevatedButton.styleFrom(
+                      backgroundColor: _canSubmit
+                          ? Theme.of(context).colorScheme.primary
+                          : Colors.grey.shade200,
+                      foregroundColor: _canSubmit
+                          ? Colors.white
+                          : Colors.grey.shade400,
+                      padding: const EdgeInsets.symmetric(horizontal: 18),
+                      shape: RoundedRectangleBorder(
+                        borderRadius: BorderRadius.circular(6),
+                      ),
+                    ),
+                    child: _isSubmitting
+                        ? const SizedBox(
+                            width: 18,
+                            height: 18,
+                            child: CircularProgressIndicator(
+                              strokeWidth: 2,
+                              color: Colors.white,
+                            ),
+                          )
+                        : const Text(
+                            '确认',
+                            style: TextStyle(
+                              fontSize: 14,
+                              fontWeight: FontWeight.w700,
+                            ),
+                          ),
                   ),
-                  filled: !hasScan,
-                  fillColor: Colors.grey.shade100,
                 ),
-                style: const TextStyle(
-                  fontSize: 15,
-                  fontWeight: FontWeight.w600,
-                ),
-              ),
+              ],
             ),
           ),
           const SizedBox(width: 8),
-          SizedBox(
-            height: 34,
-            child: ElevatedButton(
-              onPressed: _canSubmit ? _submit : null,
-              style: ElevatedButton.styleFrom(
-                backgroundColor: _canSubmit
-                    ? Theme.of(context).colorScheme.primary
-                    : Colors.grey.shade200,
-                foregroundColor: _canSubmit
-                    ? Colors.white
-                    : Colors.grey.shade400,
-                padding: const EdgeInsets.symmetric(horizontal: 18),
-                shape: RoundedRectangleBorder(
-                  borderRadius: BorderRadius.circular(6),
+          // Right half: 完成本箱
+          Expanded(
+            flex: 1,
+            child: SizedBox(
+              height: 34,
+              child: OutlinedButton(
+                onPressed: hasItems ? _finishManyToOneBox : null,
+                style: OutlinedButton.styleFrom(
+                  shape: RoundedRectangleBorder(
+                    borderRadius: BorderRadius.circular(6),
+                  ),
+                  side: BorderSide(
+                    color: hasItems
+                        ? Colors.grey.shade600
+                        : Colors.grey.shade300,
+                  ),
                 ),
-              ),
-              child: _isSubmitting
-                  ? const SizedBox(
-                      width: 18,
-                      height: 18,
-                      child: CircularProgressIndicator(
-                        strokeWidth: 2,
-                        color: Colors.white,
-                      ),
-                    )
-                  : const Text(
-                      '确认',
+                child: Row(
+                  mainAxisAlignment: MainAxisAlignment.center,
+                  children: [
+                    Text(
+                      '完成本箱',
                       style: TextStyle(
                         fontSize: 14,
                         fontWeight: FontWeight.w700,
+                        color: hasItems ? Colors.black87 : Colors.grey.shade400,
                       ),
                     ),
+                    const SizedBox(width: 6),
+                    Container(
+                      padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 1),
+                      decoration: BoxDecoration(
+                        color: hasItems
+                            ? Colors.grey.shade200
+                            : Colors.grey.shade100,
+                        borderRadius: BorderRadius.circular(3),
+                      ),
+                      child: Text(
+                        'P3',
+                        style: TextStyle(
+                          fontSize: 10,
+                          fontWeight: FontWeight.w700,
+                          color: hasItems ? Colors.black54 : Colors.grey.shade400,
+                        ),
+                      ),
+                    ),
+                  ],
+                ),
+              ),
             ),
           ),
         ],