playlists + player: every service's list through one door with its names matched for real, and shuffle that readies exactly what it promises

src-tauri/src/playlist_formats.rs

@@ -233,7 +233,7 @@ fn parse_m3u(bytes: &[u8]) -> Result<ParsedPlaylist, String> {
 
 /// "Artist - Title" (or the em/en-dash forms) split. Returns (artist, title);
 /// no separator means the whole display string is the title.
-fn split_artist_title(display: &str) -> (Option<String>, Option<String>) {
+pub(crate) fn split_artist_title(display: &str) -> (Option<String>, Option<String>) {
     let display = display.trim();
     if display.is_empty() {
         return (None, None);