Update app.py

app.py

@@ -79,9 +79,9 @@ def navigate(screenshot, task: str, platform: str, history):
     for message in messages:
         if message['role'] == 'user' and isinstance(message.get('content'), list):
             for item in message['content']:
-                if item.get('type') == 'image' and isinstance(item.get('image'), str):
+                if item.get('type') == 'image_url' and isinstance(item.get('image_url'), str):
                     # This is a base64 string, convert it to a PIL image
-                    item['image'] = load_base64_to_pil(item['image'])
+                    item['image_url'] = load_base64_to_pil(item['image_url'])
 
     prompt_header = (
             "You are a GUI agent. You are given a task and your action history, with screenshots."