[WIP] Fix current scene functionality and implement book status management

[Copilot]

• Explore repo and understand current code structure
• Fix PDFService to accept URL strings and store document data
• Fix bookStore with proper DI, setDocumentReady (initialPage/scale clamping), setTotalPages, setScale
• Implement PersistenceService with Dexie (DexieWorkspacePersistencePort + file storage)
• Fix workspaceStore with proper DI, reset(), currentSnapshot, full save/restore
• Add RecentBook type to domain.ts and create recentBooksStore
• Update App.tsx to show recently opened books and save book metadata on import
• Verify all unit tests pass

Original prompt

目前保存现场功能无法正常使用。另外导入书籍并没有应用对应书籍的状态。应该在这里做一个对应书籍的状态。并且加一个最近打开列表（以及保存到书架以供下次打开）。主要是这一块的状态管理问题。

---

🔒 GitHub Advanced Security automatically protects Copilot coding agent pull requests. You can protect all pull requests by enabling Advanced Security for your repositories. Learn more about Advanced Security.

[nkanf-dev]

@copilot Try again.