[Bug] 自定义单元格合并，合并checkbox、radio列，合并后只出现自定义合并中配置的text文字，没有渲染checkbox、radio

Version

1.7.4 后的版本

Link to Minimal Reproduction

无

Steps to Reproduce

const records = [
{ productName: 'aaaa', price: 20, check: { text: 'unchecked', checked: false, disable: false } },
{ productName: 'bbbb', price: 18, check: { text: 'checked', checked: true, disable: false } },
{ productName: 'cccc', price: 16, check: { text: 'disable', checked: true, disable: true } },
{ productName: 'cccc', price: 14, check: { text: 'disable', checked: false, disable: true } },
{ productName: 'eeee', price: 12, check: { text: 'checked', checked: false, disable: false } },
{ productName: 'ffff', price: 10, check: { text: 'checked', checked: false, disable: false } },
{ productName: 'gggg', price: 10, check: { text: 'checked', checked: false, disable: false } }
];

const columns = [
{
field: 'isCheck',
title: '',
width: 60,
headerType: 'checkbox',
cellType: 'checkbox'
},
{
field: 'productName',
title: 'productName',
width: 120
},
{
field: 'price',
title: 'checkbox',
width: 120,
cellType: 'checkbox',
disable: true,
checked: true
},
{
field: 'check',
title: 'checkbox',
width: 120,
cellType: 'checkbox'
// disable: true
}
];
const option = {
records,
columns,
customMergeCell: (col, row, table) => {
if (col ===0 && row >= 1 && row <= 2) {
return {
text: '合并',
range: {
start: {
col: 0,
row: 1
},
end: {
col: 0,
row:2
}
},
style: {
bgColor: 'red'
}
};
}
}
};
const tableInstance = new VTable.ListTable(document.getElementById(CONTAINER_ID), option);
window['tableInstance'] = tableInstance;

Current Behavior

合并后只出现自定义合并中配置的text文字，没有渲染checkbox、radio

Expected Behavior

checkbox和radio列自定义合并后可以正常展示checkbox和radio

Environment

- OS:Windows11
- Browser:chrome 版本 138.0.7204.185（正式版本） （64 位）
- Framework: vue3

Any additional comments?

No response

Start from the customMergeCell example and trace the rendering path for merged cells with checkbox or radio columns. Reproduce the provided VTable.ListTable configuration, then verify that merged checkbox and radio cells render their controls rather than only the configured text.