Local folder sync

Here's what's new in this version:

📁 Local Folder Sync

We’ve added a new way to manage your library by linking folders directly from your device storage.

• Syncing Folders: When you link a folder, the app now supports local metadata synchronization. This tracks your progress and bookmarks within that folder so you can stay in sync across devices without moving your files.
• Standard Imports: The original option to import books directly into the app's internal storage is still available and works exactly as it did before.
• Background Extraction: Book covers and metadata are now processed in the background, keeping the app snappy while it organizes your library.
• Pull-to-Refresh: You can now manually trigger a sync for folder books' metadata directly from the home screen.

📖 Enhanced Reading Experience

• PDF Pan Lock: Tired of the page sliding sideways? Use the new lock icon(in top app bar) to restrict movement to vertical scrolling only.
• Auto-Scroll Limits: You can now set minimum and maximum speed bounds for a more controlled auto-reading experience.
• Better Bookmarks: Navigating to bookmarks in EPUBs is now much more reliable, featuring a loading overlay for long jumps to ensure the page renders correctly.

🛠️ Performance & Stability

• Memory Optimizations: Fixed several "Out of Memory" crashes related to large image files in EPUBs and long-running Text-to-Speech sessions.
• Lazy Loading: Images are now loaded only when they appear on screen, significantly reducing the app's memory footprint.

🎨 UI Improvements

• Refreshed Library: A cleaner interface for managing your collection.
• Edge-to-Edge: Improved support for modern displays with better padding and navigation bar transparency.