Linthra 0.1.10 — mobile data controls & playlist tools.

Mobile data:
- Choose Wi-Fi only, Save data, or Unlimited for downloads and
  smart pre-cache.
- Linthra now reads Android's metered-network state instead of
  assuming every connection is Wi-Fi.
- Wi-Fi only keeps new remote downloads and smart pre-cache off
  LTE/5G and metered hotspots.
- Save data allows user-requested downloads while pausing automatic
  smart pre-cache.

Playlists:
- Add every song from an album or artist to a playlist.
- Long-press songs to select several and add only that selection.
- The shared playlist flow still handles duplicates and lets you
  create a playlist immediately.
