select组件使用遇到问题

#### 描述问题：

当value值包含 ,@ 字段，就会导致选择的数据有问题。也会导致autofill出现问题。

```json
{
"type": "select",
"label": "autoFill触发器",
"name": "select",
"autoFill": {
"option.instantValidate": "${value}",
"option.submitValidate": "${value}"
},
"clearable": true,
"options": [
{
"label": "Option A",
"value": "aaaaa,@dsakldjsal"
},
{
"label": "Option B",
"value": "b"
}
]
}
```
如：正常情况下，选择"Option A"，会显示选择了"Option A"，但是如果值中有,@字符，选择了"Option A"后，会显示value，还显示不全，其中如果使用了autoFill属性，,@ 字符后面的字符也会丢失

#### 截图或视频：


#### 如何复现（请务必完整填写下面内容）：

1. 你是如何使用 amis 的？
`sdk`、`npm` 或`其他`...

2. amis 版本是什么？请先在最新 beta 版本测试问题是否存在

3. 粘贴有问题的完整 `amis schema` 代码：
```json
{
"type": "page",
"body": {
"type": "form",
"api": "/amis/api/mock2/form/saveForm",
"debug": true,
"debugConfig": {
"levelExpand": 2
},
"body": [
{
"type": "select",
"label": "autoFill触发器",
"name": "select",
"autoFill": {
"option.instantValidate": "${value}",
"option.submitValidate": "${value}"
},
"clearable": true,
"options": [
{
"label": "Option A",
"value": "aaaaa,@dsakldjsal"
},
{
"label": "Option B",
"value": "b"
}
]
},
{
"type": "input-text",
"name": "option.instantValidate",
"label": "目标1",
"description": "填充后立即校验",
"required": true,
"validateOnChange": true,
"validations": {
"equals": "Option B"
},
"validationErrors": {
"equals": "校验失败，数据必须为Option B"
}
},
{
"type": "input-text",
"name": "option.submitValidate",
"label": "目标2",
"description": "填充后提交表单时才校验",
"required": true,
"validations": {
"equals": "Option B"
},
"validationErrors": {
"equals": "校验失败，数据必须为Option B"
}
},
{
"type": "input-text",
"name": "option.c",
"label": "表单项3",
"description": "不受autoFill影响的表单项",
"value": "abc"
}
]
}
}
```

4. 操作步骤
请简单描述一下复现的操作步骤...

Start with the complete AMIS schema in the issue and reproduce the select component using an option value containing `,@`, both with and without autoFill. Trace how the select value and autoFill substitutions are parsed, then add coverage confirming the displayed selection and autofilled fields retain the full text after `,@`.

Written by the indexing model from the issue text.