This commit introduces support for OPDS 1.2 facets, enabling advanced filtering and sorting in compatible catalogs.
To maintain a clean and uncluttered book list, facet options are presented in a dedicated context menu. When a catalog provides facets or a search link, the top-left button now triggers a menu with all available actions.
- Facet links are parsed and grouped by the `opds:facetGroup` attribute.
- The context menu includes facet groups, search, and bookmarking.
- Adds support for `opds:activeFacet` and `thr:count`.
- The parsing logic now cleanly separates feed-level links from entries, correctly handling catalogs with facets but no initial items.
- Unrelated style changes were reverted and the test suite was improved for reliability.
Refactoring:
-removed duplicated code
-removed passing of username/password through all the modules
-logical order of the methods
-some optimizing and drying
-comments
New features:
-subcatalog link can be saved to the list of servers (eg: direct link to the catalog of books by an author)
-more book information can be fetched and shown (Book information)
-fixed access to the Standard library (by @KGKopli, closes#9372)
I've found that some OPDS catalogs have multiple downloads of the same filetype, but optimized or formatted in different ways. The Title of the download is much more descriptive in this case, so I thought it would be better to display the title if available.
The OPDS catalog at https://standardebooks.org/opds is a good example. Note how entries in https://standardebooks.org/opds/new-releases have three different epub downloads, titled "Recommended compatible epub", "Advanced epub", and "Kobo Kepub epub".
