Version 4.5 sent to AppStore (KOReader sync, small updates)

[petrjahoda]

■ New features
- Sync with KOReader & Kobo. Your reading position follows you between justread and any e-reader running KOReader, a Kobo included, in both directions. Connect the official KOReader sync server, your own, or a Grimmory library in Settings > KOReader, and the page you stopped on is waiting on the other device. Opening a book asks before it jumps, or jumps by itself if you prefer. The Help Center walks through every route step by step, from installing KOReader to picking a server.
- Add-books menu. The + button in the Library opens a menu: Import from Files, Get Free Books, and Calibre Books whenever your server can be reached.

■ Improvements
- Read Aloud keeps the spoken word in the middle of the screen in scroll mode, instead of snapping every sentence to the top: youtube
- Page counts are computed the way Calibre does it, so a book is the same length here as in the Pages column of your Calibre library. Every book is recounted once after the update.
- Hiding the goal card on Home also hides the streak-at-risk banner and the finish confetti.
- Filters now stay on the device that set them, so a filter on the iPhone no longer shrinks the library on the iPad.

■ Fixes
- A damaged EPUB or comic file no longer crashes the app when it is opened or when its cover is read.
- A neural Read Aloud voice that fails part way through preparing a book no longer freezes the app.
- The reader's close and rotate buttons follow the book's colors on iOS 18, so a dark book on a light-mode device no longer hides them.

■ Localization
- All the new text is natively translated across all 18 supported languages.