fix: 修改为500ms

[myk1343]

修改为500ms

Log: 修改为500ms

[deepin-ci-robot]

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This pull-request has been approved by: myk1343

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关键摘要:

• QThread::msleep(500); 可能会导致线程阻塞，建议使用非阻塞的等待机制，如 QEventLoop 或 QTimer。
• QFile dbusResult(reply.value()); 应该检查 reply.value() 是否为空，以避免潜在的空指针异常。

是否建议立即修改:

• 是