The playlist import picker now also accepts .m3u/.m3u8; EXTINF entries
feed the same Deezer enrichment pipeline as CSV. Collection screens
(wishlist, loved, playlists) gain an export action that resolves each
track to its local file, writes SAF entries relative to the download
tree root so external players and DAP copies resolve them, skips
tracks without a file, and shares the .m3u8 via the system sheet.