RolePermissionPreviewVO

角色授权双模式预览视图

预览接口只做推导与差异运算，不落库。前端据此渲染“将新增 / 将移除 / 复用保护”
确认区，并接收非阻断预警用于提示勾选菜单在授权后可能不可见

{
    "finalPermissionIds": [
        0
    ],
    "added": [
        {
            "id": 0,
            "permCode": "string",
            "permName": "string"
        }
    ],
    "removed": [
        {
            "id": 0,
            "permCode": "string",
            "permName": "string"
        }
    ],
    "reusedProtected": [
        0
    ],
    "warnings": [
        "string"
    ]
}