* Updated `.gitattributes` to correctly vendor all files within the `libmobi` and `woff2` directories.
* Improved TTS chapter transition handling
* Improved TTS stability and chapter advancement in the EPUB reader.
* Implemented PDF metadata extraction for titles and authors using PdfiumCore in `MainViewModel` and `MetadataExtractionWorker`.
* Implemented support for interactive footnotes in the EPUB vertical reader.
* Added support for footnotes in the paginated EPUB reader.
* Implemented a customizable app theming system.
* Added support for app-wide contrast and text brightness customization in the "App Theme" option.
* option to adjust pull-to-chapter-change drag in the EPUB vertical reader under visual options.
* Updated `PdfViewerScreen` to replace the standalone full-screen toggle with a more comprehensive "Visual Options" system UI management tool.
