Add Claude Sonnet 4.5 support and improve action handling (#362)

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Co-authored-by: Claude <noreply@anthropic.com>

desktop_env/controllers/python.py

@@ -238,12 +238,17 @@ class PythonController:
             "returncode": -1
         }
 
-    def execute_action(self, action: Dict[str, Any]):
+    def execute_action(self, action):
         """
         Executes an action on the server computer.
         """
+        # Handle string actions
         if action in ['WAIT', 'FAIL', 'DONE']:
             return
+        
+        # Handle dictionary actions
+        if type(action) == dict and action.get('action_type') in ['WAIT', 'FAIL', 'DONE']:
+            return
 
         action_type = action["action_type"]
         parameters = action["parameters"] if "parameters" in action else {param: action[param] for param in action if param != 'action_type'}