v1.8.6

Full Changelog: v1.8.5...v1.8.6
Feature:

1. Kindle Mode：Automatically detects whether it is a Kindle device. If so, it will enter Kindle mode automatically without manual clicking.
2. Performance optimization: Improve speed of reading configuration by caching to the window object.
3. Optimization of the matching algorithm for automatically activating the last read chapter in the table of contents on the book details page.

Bug fix:

1. The issue where the click-to-zoom functionality of the medium-zoom library is unavailable in flip-page mode.
2. The flickering issue after switching themes will be resolved with the utmost effort.