[功能请求] 输入框预输入文本

### QQ(TIM) 版本 / QQ(TIM) Version

TIM 3.0.0

### 为什么你认为需要此功能

有一些特殊用途
例如屏蔽输入文字弹出推荐表情

### 联系到哪些已经存在的 bug 或者功能

_No response_

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

也许是很简单的功能
功能实现仿照: https://github.com/cinit/QAuxiliary/blob/f390a782b6a1ceaa86af03569b89d49630022f6b/app/src/main/java/xyz/nextalone/hook/ChatInputHint.kt
具体功能:
在打开聊天页面后 把输入框内文字直接替换成设置好的文本
感谢😀

不需要理会"会覆盖输入草稿"

Start by reading the referenced app/src/main/java/xyz/nextalone/hook/ChatInputHint.kt implementation and compare its behavior with this request. Trace how the chat page and configured text are handled, then verify that opening a chat replaces the input text as requested, including the stated acceptance that drafts may be overwritten.

Written by the indexing model from the issue text.