Fix track icons for Apps and Radios in Squeezebox (home-assistant#151001)

Author: peteS-UK

homeassistant/components/squeezebox/browse_media.py

@@ -248,11 +248,16 @@ def _get_item_thumbnail(
     item_type: str | MediaType | None,
     search_type: str,
     internal_request: bool,
+    known_apps_radios: set[str],
 ) -> str | None:
     """Construct path to thumbnail image."""
     item_thumbnail: str | None = None
+
     track_id = item.get("artwork_track_id") or (
-        item.get("id") if item_type == "track" else None
+        item.get("id")
+        if item_type == "track"
+        and search_type not in known_apps_radios | {"apps", "radios"}
+        else None
     )
 
     if track_id:
@@ -357,6 +362,7 @@ async def build_item_response(
                 item_type=item_type,
                 search_type=search_type,
                 internal_request=internal_request,
+                known_apps_radios=browse_data.known_apps_radios,
             )
 
             children.append(child_media)