fix: remove eager pinController dispose that races with BlocBuilder

The .then() callback disposed the controller before the dialog's
BlocBuilder finished tearing down, causing a use-after-dispose crash.
The controller is lightweight and will be GC'd with the dialog.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Jshewmaker

lib/player/view/customize_player_page.dart

@@ -436,7 +436,7 @@ class _FriendSection extends StatelessWidget {
             ),
           );
         },
-      ).then((_) => pinController.dispose()),
+      ),
     );
   }
 }