fix: code-review #2 — dedup MagicBytes, auth für check_corrupted, UI-Flag, merged player streams, jq-JSON

lib/services/player_service.dart

@@ -15,7 +15,6 @@ class PlayerService {
   final List<Song> _warteschlange = [];
   int _aktuellerIndex = -1;
   StreamSubscription<PlayerState>? _autoNextSub;
-  StreamSubscription<PlayerState>? _fehlerSub;
 
   AudioPlayer get _p {
     if (_player == null) {
@@ -23,14 +22,7 @@ class PlayerService {
       _autoNextSub = _player!.playerStateStream.listen((state) {
         if (state.processingState == ProcessingState.completed) {
           naechstes();
-        }
-      });
-      // ── Playback-Fehler abfangen → Song als korrupt markieren ──
-      _fehlerSub = _player!.playerStateStream.listen((state) {
-        if (state.processingState == ProcessingState.completed) return; // bereits behandelt
-        // PlayerState hat kein explizites "failure"-Feld, aber wir prüfen ob
-        // die Quelle nicht geladen werden konnte (idle nach Fehlversuch)
-        if (state.processingState == ProcessingState.idle &&
+        } else if (state.processingState == ProcessingState.idle &&
             _aktuellerIndex >= 0 &&
             _aktuellerIndex < _warteschlange.length) {
           final song = _warteschlange[_aktuellerIndex];
@@ -39,7 +31,6 @@ class PlayerService {
             _markiereAlsKorrupt(song);
           }
         }
-      });
     }
     return _player!;
   }
@@ -122,7 +113,6 @@ class PlayerService {
 
   void dispose() {
     _autoNextSub?.cancel();
-    _fehlerSub?.cancel();
     _player?.dispose();
     _player = null;
     _songWechsel.close();