fix(Form): update __clone method to ensure deep cloning of properties and items

fix(form): deep clone form object

Author: lihq1403

src/Structure/Form/Form.php

@@ -92,6 +92,21 @@ public function __construct(
         $this->setEncryption($encryption, $encryptionValue);
     }
 
+    public function __clone()
+    {
+        if ($this->properties !== null) {
+            foreach ($this->properties as $key => $property) {
+                $this->properties[$key] = clone $property;
+            }
+        }
+        if ($this->items !== null) {
+            $this->items = clone $this->items;
+        }
+        if ($this->value !== null) {
+            $this->value = clone $this->value;
+        }
+    }
+
     public function isRoot(): bool
     {
         return $this->key === Form::ROOT_KEY;

tests/Structure/Form/FormTest.php

@@ -1035,6 +1035,14 @@ public function testAppendConstValue2()
                         'sku' => 'SKU456',
                         'qty' => '456',
                     ],
+                    [
+                        'sku' => 'SKU789',
+                        'qty' => '789',
+                    ],
+                    [
+                        'sku' => 'SKU000',
+                        'qty' => '000',
+                    ],
                 ],
             ],
         ];