[Feature] 快速输入和复制

<img width="1920" height="922" alt="Image" src="https://github.com/user-attachments/assets/72cd0a0c-204b-485e-bbd8-dfed3ccba118" />

支持类似gemini那种在聊天框 按键盘的 上下键 拿到之前的输入提问

<img width="1920" height="922" alt="Image" src="https://github.com/user-attachments/assets/6a0c95bb-1342-4852-91d6-a28599e4c83c" />
加个图标快速复制