fix: cell running reconnect status

[HellowVirgil]

Description

Please include a summary of the changes and the motivation behind them. Also, include any relevant context or links to related issues.

Type of Change

Please mark the type of change:

• Bug fix
• New feature
• Documentation update
• Code refactoring
• Other (please describe):

Related Issues

Please list any issues related to this pull request (e.g., Fixes #123, Closes #456).

Testing

Please describe the tests that were performed to verify your changes. Include details about the testing framework, if applicable.

• Unit tests
• Integration tests
• Manual testing

Checklist

• My code follows the project’s coding style.
• I have updated the documentation as necessary.
• I have added tests to cover my changes.
• All new and existing tests pass.
• My changes require a change to the documentation.

Additional Notes

修复 output 断开后恢复输出， cell 还在执行中但 kernel 状态显示未知的问题。