[BUG]: 新下载任务不跳出下载窗口

Description

"新建后打开下载页" 这个功能在新测试版失效，下载新文件的时候不会打开下载窗口

Rayburst Version

Rayburst v4.0.0-beta.2

Issue Source

Rayburst App

Platform

Windows (x64)

OS Version

WIN10 22H2

Steps to Reproduce

下载新文件的时候不会打开下载窗口

Diagnostic Logs

rayburst-logs.zip

Screenshots

Validations

• I have searched existing issues and tested with the latest beta release when possible.
• I have uploaded the exported diagnostic .zip directly, or kept the same ZIP structure after redaction.
• This is a reproducible Rayburst desktop-app bug. Questions belong in GitHub Discussions, browser-extension-only issues belong in rayburst-connect, and engine-only issues belong in aria2-next.