fix: Playlists Pagination + Player Fehlermeldungen

- Playlists: Alle werden jetzt geladen (Pagination)
- Player: Fehlermeldung wenn kein Geraet aktiv
- next/previous/repeat/shuffle zeigen Fehler statt stillschweigend zuversagen

spotify_cli/ui.py

@@ -435,19 +435,26 @@ class UI:
         self.loading = True
         self.draw()
         try:
-            data = self.client.get_playlists(limit=50)
-            items = []
-            for p in data.get("items", []):
-                items.append({
-                    "type": "playlist",
-                    "id": p["id"],
-                    "name": p["name"],
-                    "tracks": p.get("tracks", {}).get("total", 0),
-                    "owner": p.get("owner", {}).get("display_name", ""),
-                    "uri": p["uri"],
-                })
-            self.content_items = items
-            self.playlists_cache = items
+            all_items = []
+            offset = 0
+            limit = 50
+            while True:
+                data = self.client.get_playlists(limit=limit, offset=offset)
+                items = data.get("items", [])
+                for p in items:
+                    all_items.append({
+                        "type": "playlist",
+                        "id": p["id"],
+                        "name": p["name"],
+                        "tracks": p.get("tracks", {}).get("total", 0),
+                        "owner": p.get("owner", {}).get("display_name", ""),
+                        "uri": p["uri"],
+                    })
+                if len(items) < limit:
+                    break
+                offset += limit
+            self.content_items = all_items
+            self.playlists_cache = all_items
         except Exception as e:
             self.content_items = []
             self.show_message(f"Fehler: {e}")