* Focus on the first element if the lastFocusedEpisodeId isn't in the viewModel.
* Performance Improvements:
- Optimized Lookup: Used a Set for efficient checking of whether lastFocusedEpisodeID exists in viewModel.elements.
- Single Pass: Reduced the number of passes needed to check for existence and set the focusedEpisodeID.
* https://github.com/jellyfin/Swiftfin/pull/1185#pullrequestreview-2241625398 Suggestions
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Co-authored-by: Joseph Kribs <joseph@kribs.net>
Ethan Pippin
Joe