fix: sanitize backticks in code_run output & simplify subagent turn header

agent_loop.py

@@ -46,8 +46,10 @@ def agent_runner_loop(client, system_prompt, user_input, handler, tools_schema,
     ]
     turn = 0;  handler.max_turns = max_turns
     while turn < handler.max_turns:
-        turn += 1; md = '**' if verbose else ''
-        yield f"{md}LLM Running (Turn {turn}) ...{md}\n\n"
+        turn += 1; turnstr = f'LLM Running (Turn {turn}) ...'
+        if handler.parent.task_dir: turnstr = f'Turn {turn} ...'
+        if verbose: turnstr = f'**{turnstr}**'
+        yield f"\n\n{turnstr}\n\n"
         if turn%10 == 0: client.last_tools = ''  # 每10轮重置一次工具描述，避免上下文过大导致的模型性能下降
         response_gen = client.chat(messages=messages, tools=tools_schema)
         if verbose: