Fix api_server: wrong list extend

api_server.py

@@ -260,7 +260,7 @@ def run_chat_prompt(req_data):
     if req_data['scene'] == 'custom_debugging':
         messages.extend(compose_openai_chat_messages_no_time(dialogue_history))
         if '头像' in system_prompt['content']:
-            messages.extend({
+            messages.append({
                 "role": 'user',
                 "content": [
                     {"type": "image_url", "image_url": {"url": user_profile['avatar']}}