Version 1.8 sent to AppStore

[petrjahoda]

Version 1.8 [22.3 sent to Apple Store]

New Features
- Tag filtering: quickly filter your library by tags from the filter menu, or browse all tags with search
- Review & feedback flow: after finishing a book, share your thoughts via App Store review or send feedback directly
- Billing warning banner: a gentle notification if there's an issue with your subscription payment, with a direct link to fix it
- Drag & drop import: drop EPUB files directly into the app on iPad

Improvements
- Redesigned onboarding with a cleaner, more focused introduction
- Paywall redesigned to match the new look, with better iPad support
- Reader settings reorganized into clearer sections: Edge Controls, Reading Bars, and Display
- Select button moved inside the Collections menu for a cleaner toolbar
- One-time swipe hint shows new users how to access collections and delete actions
- Home screen now shows a helpful message when your library is empty
- Highlights loading now shows a spinner instead of a blank screen
- Roadmap and feature suggestions show clear error messages instead of failing silently

Fixes
- Fixed reading time being occasionally counted twice
- Fixed feedback emails cutting off text with special characters
- iCloud downloads no longer briefly freeze the interface
- Improved memory usage when closing the reader
- Faster library scanning and statistics queries

Localization
- All new features fully translated across all 15 supported languages.