- Migrate renderer from md-editor/md-format to a Tiptap-based native editor
(native-doc pipeline: native-doc, markdown-to-native, native-to-markdown,
native-assembly, migration, backup)
- Use pointer-event-based chapter reordering with grab/grabbing cursors to
avoid the Wayland prohibited-drop cursor while preserving reordering
- Add a persistent Home button that closes the open book and returns to the
Folio library/welcome screen
- Update app icons, package deps, theme styles, and tests
