Remove progression subgenre, fix UI filters, add author blocklist, fix series year filter

- Remove "progression" as a subgenre entirely (meaningless catch-all)
- GenreFilter: only show subgenres with books, add "All" toggle
- SeasonNav: read available years from meta.json instead of hardcoding
- Author blocklist in export filters (Bruce Sentar, Logan Jacobs)
- Series searches skip year filter so all books in a series are stored
- Updated static data exports with re-fetched series data