[功能请求] 移除全屏输入时图片与文字之间的换行

### QQ(TIM)版本/QQ(TIM) Version

9.0.0.14110

### 为什么你认为需要此功能

碍眼
外显会显示成 `[图片] [图片] 文本`
内容会变成
```
[图片]
[图片]
文本
```

### 联系到哪些已经存在的bug或者功能

_No response_

### 具体功能需要/Specific features require

全屏输入时，移除在图片与文字之间自动添加的换行

No file or test is named. Start by locating the full-screen input handling for QQ/TIM 9.0.0.14110, reproduce mixed image-and-text input, and trace where the automatic line break is introduced. Done means images and text remain inline instead of being separated by added line breaks.

Written by the indexing model from the issue text.