iOS 1.0 RC 2: Plex streams under upload caps, shuffle and album radio stations, Recently Added list, photo covers, crossfade

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ios/Stemify/Plex/JellyfinClient.swift

@@ -440,6 +440,8 @@ final class JellyfinClient: MediaSource, @unchecked Sendable {
         URL(string: base + "/Audio/\(partKey)/stream?static=true&api_key=" + urlEncode(server.token))
     }
 
+    func streamUrl(_ ratingKey: String, partKey: String) async -> URL? { partUrl(partKey) }
+
     /// True if [url] answers as a Jellyfin server.
     func probe() async -> Bool {
         guard let u = URL(string: base + "/System/Info/Public") else { return false }