Linthra 0.1.9 — HTTPS trust fix & sync improvements.

A small update for self-hosted HTTPS servers, Navidrome/Subsonic sync,
and favorites.

Connections:
- HTTPS servers using a user-installed CA certificate now connect.
  Install your private CA on the device and Jellyfin or Navidrome
  servers behind it just work — certificate chains and hostnames are
  still fully verified.

Navidrome / Subsonic:
- Playlists and favorites now sync two-way with the server.
- Favorites are reliable: a failed or offline change is queued and
  retried instead of being silently reverted.
- Changes made on the server are picked up automatically — no manual
  sync needed.
- The first sync starts on its own after sign-in.

Library:
- Add or remove favorites straight from any track menu, without
  starting playback.
