[功能请求] 显示特别关心前缀

### QQ(TIM) 版本 / QQ(TIM) Version

QQ9.1.35(8708)

### 为什么你认为需要此功能

能够明确的告诉用户信息来自特别关心

### 联系到哪些已经存在的 bug 或者功能

QQ通知进化 PLUS，特别关心通知单独分组，关闭群普通消息特别关心提示，MessagingStyle 通知

### 具体功能需要 / Detailed features requirements

在特别关心消息前添加 [特别关心] 前缀

Start by tracing QQ/TIM notification handling, especially the MessagingStyle notification path mentioned in the issue. Verify how special-concern messages are identified and ensure completed notifications visibly use the [特别关心] prefix without changing the requested notification grouping behavior.

Written by the indexing model from the issue text.