Due to the change of page and maxPage before, the history of maxPage should be real maxPage.
If not, when maxPage in reader is 1, the maxPage in history will be none or the last ep's real maxPage.
* Feat: Add dynamic image-per-page configuration for gallery mode
- Implemented a slider to configure the number of images displayed per page (1-5) in gallery mode.
- Updated the reader to dynamically reflect changes in the `imagesPerPage` setting without requiring a mode switch or reopening.
- Ensured compatibility with existing continuous reading mode.
* fix currentImagesPerPage
* fix Continuous mode
* improve readerScreenPicNumber setting disable view
* improve PhotoViewController