UX Improvements: Playback Speed, Episode Selection, and Indicators

[mrfoggg]

1. Playback Speed Menu Focus
   ​Current behavior: When opening the playback speed menu, the selection always starts at 0.25x.
   ​Problem: If a user needs to switch between 1x and 2x, they must scroll through the entire list every time.
   ​Expected behavior: The menu should open with the current playback speed (or at least 1x) focused by default.
   ​2. Episode Selection & Metadata
   ​Current behavior: The episode list in the player UI always highlights the first episode of the season.
   ​Problem: Users have to manually scroll to find their current position to switch to the next episode.
   ​Expected behavior: * The currently playing episode should be focused when opening the list.
   ​Feature Request: Add the ability to press "Down" on the remote to show the episode description and additional metadata for the selected item.
   ​3. Visual Speed Indicator
   ​Current behavior: There is no visual feedback when speed is changed.
   ​Expected behavior: Display an icon or a text label (e.g., "1.25x") on the OSD (On-Screen Display) whenever the playback speed is not equal to 1.