Pubu – eBooks Videos Anytime

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- Add a button to download book attachments in the library
- Fix the issue where font size adjustment was ineffective for certain books
- Improve the cross-device sync experience for reading progress
- Add a copy button for ChatGPT reply content
- Allow filtering "updated items" in the library
- Fix the issue where emails containing "+" couldn't log in to the app
- Improve A to Z sorting logic based on the volume number in book titles
- Bug fixes and stability enhancements