Update app.py

app.py

@@ -195,7 +195,7 @@ class ConnectFour:
 
     def format_game_state(self):
         board_str = self.board_to_string()
-        available_positions = get_available_positions(board_str)
+        available_positions = get_available_positions(self.board )#board_str)
         
         # Format player and AI moves
         player_moves_str = ", ".join(self.player_moves) if self.player_moves else ""