[Bug] Chat Interface Overlaps Sidebar When Using Page Up/Down Keys After Inputting Text

### 📦 Deployment Method

Official installation package

### 📌 Version

v2.15.8

### 💻 Operating System

Windows

### 📌 System Version

Windows 11 24H2

### 🌐 Browser

Chrome

### 📌 Browser Version

131.0.6778.69

### 🐛 Bug Description

When I input anything in the text box, and then press the Page Up/Down key, the chat interface shifts overall and overlaps with the sidebar.


### 📷 Recurrence Steps

1. Input anything in the text box
1. Press the Page Up/Down key

### 🚦 Expected Behavior

The chat interface should maintain its original position.

### 📝 Additional Information

_No response_