fix: correct import sorting in test_state_persistence.py

Fix isort import sorting check failure in CI pipeline by running isort
on tests/test_state_persistence.py to comply with project formatting rules

Author: offendingcommit

tests/test_state_persistence.py

@@ -371,7 +371,7 @@ def test_toggle_updates_all_clients(self):
             with patch('src.core.game_logic.board_views', mock_board_views):
                 # Import and call toggle_tile
                 from src.core.game_logic import toggle_tile
-                
+
                 # Debug: check initial state
                 print(f"Initial clicked_tiles: {mock_clicked_tiles}")
                 print(f"Initial is_game_closed: False")