MetroList: Very High Audio Quality and Explicit Autoplay Toggle

Problem

MetroList didn't expose a Very High audio quality option. Users wanting maximum bitrate had no way to select it. Additionally, autoplay behavior wasn't explicitly configurable.

Solution

Added a new "Very High" audio quality option that prioritizes the highest bitrate formats available from YouTube. Added an explicit "Autoplay" toggle in player settings controlling whether the next song auto-plays when the current one ends (enabled by default). The autoplay feature respects repeat mode: if Repeat All or Repeat One is enabled, autoplay is bypassed in favor of repeat behavior.

Result

Users can now select maximum audio quality. Autoplay is explicitly controllable and correctly respects repeat settings.

Commit: MetrolistGroup/Metrolist@def9d19
PR: #3440