Updated the ShowMetadataApplier class to include logging for scenarios where show posters are not retrieved successfully. Introduced logging statements to capture warnings when poster URLs are empty or when downloads fail, improving traceability and debugging capabilities. Additionally, updated related tests to ensure proper logging behavior during poster processing.
Implemented several unit tests to validate the behavior of dynamic group modes, including the preservation of pinned items when switching to dynamic mode, the dropping of exclusions when reverting to static mode, and the default pinning of new elements in dynamic groups. Additional tests ensure that exclusions are correctly applied and removed, and that static groups refuse exclusions. These tests enhance the coverage and reliability of the group management functionality.