fix: Update Brand Code input to always be disabled with consistent placeholder and styling

src/pages/master/brandDevice/component/BrandForm.jsx

@@ -28,11 +28,11 @@ const BrandForm = ({ form, formData, onValuesChange, isEdit = false }) => {
 
             <Form.Item label="Brand Code" name="brand_code">
                 <Input
-                    placeholder={isEdit ? 'Brand Code Auto Fill' : 'Brand Code'}
+                    placeholder={'Auto Fill Brand Code'}
-                    disabled={isEdit}
+                    disabled={true}
                     style={{
-                        backgroundColor: isEdit ? '#f5f5f5' : 'white',
+                        backgroundColor: '#f5f5f5',
-                        cursor: isEdit ? 'not-allowed' : 'text'
+                        cursor: 'not-allowed'
                     }}
                 />
             </Form.Item>