高效批量导入多个 YouTube 链接到 Google NotebookLM，智能处理各种场景，包括新建笔记本时自动弹出的窗口，并支持链接去重和成功后自动关闭。
本脚本为 Google NotebookLM 用户设计，旨在解决手动逐一添加 YouTube 视频来源的繁琐过程。通过一个悬浮按钮和简洁的弹窗界面，您可以一次性粘贴多个 YouTube 链接，脚本会自动、依次将它们添加为 NotebookLM 的来源。
This script is designed for Google NotebookLM users to solve the tedious process of manually adding YouTube video sources one by one. With a floating button and a clean pop-up interface, you can paste multiple YouTube links at once, and the script will automatically add them as sources in NotebookLM sequentially.
innerHTML 操作，杜绝 TrustedHTML 安全问题。