fix(stage): name the presenter instead of a lone artwork glyph

beefy_player/widgets/stage.py

@@ -140,11 +140,14 @@ class StageInfo(Widget):
             album = Text(no_wrap=True)
             if song.album:
                 album.append(truncate(song.album, max(8, width - 22)), style="dim")
-            if station.dj:
+            presenter = station.presenter_label
+            if presenter:
                 if song.album:
                     album.append("   ·   ", style="dim")
-                album.append(f"dj {truncate(station.dj, 18)}", style="dim")
-            if song.art_url:
+                album.append(truncate(presenter, max(8, width - 22)), style="dim")
+            # The marker means "there is artwork", not "here is a lone box":
+            # without album or presenter there is nothing for it to mark.
+            if song.art_url and album.plain.strip():
                 album.append("  ▣", style="cyan")
         else:
             artist = Text("waiting for track data…", style="italic yellow")