- Add pill badge system for displaying file type and suffix tags
- Add "Remove from Recents" option to remove individual books
- Add "Clear All Recents" option to clear entire recents list
- Add clearThumbExistsCache() for cache invalidation
- Create BadgeConfig.h for customizable badge mappings
- Add extractBookTags() utility for parsing filename badges
- Add drawPillBadge() component for rendering badges
