minor: round-end newline, web error msg, autonomous subagent review, tmwebdriver troubleshoot

agentmain.py

@@ -156,7 +156,7 @@ if __name__ == '__main__':
             while 'done' not in (item := dq.get(timeout=120)): 
                 if 'next' in item and random.random() < 0.95:  # 概率写一次中间结果
                     with open(f'{d}/output{nround}.txt', 'w', encoding='utf-8') as f: f.write(item.get('next', ''))
-            with open(f'{d}/output{nround}.txt', 'w', encoding='utf-8') as f: f.write(item['done'] + '\n[ROUND END]\n')
+            with open(f'{d}/output{nround}.txt', 'w', encoding='utf-8') as f: f.write(item['done'] + '\n\n[ROUND END]\n')
             for _ in range(150):  # 等reply.txt，5分钟超时
                 time.sleep(2)
                 if os.path.exists(rp):