fix: no translation for time in greeter

Set locale to the current user's locale when firstly entering system

Issue: linuxdeepin/developer-center#6994

src/session-widgets/lockcontent.cpp

@@ -294,7 +294,7 @@ void LockContent::onCurrentUserChanged(std::shared_ptr<User> user)
     m_user = user;
 
     m_localeName = regionValue(localeName_key);
-    QLocale locale = m_localeName.isEmpty()? QLocale::system() : QLocale(m_localeName);
+    QLocale locale = m_localeName.isEmpty()? user->locale() : QLocale(m_localeName);
     m_shortTimeFormat = regionValue(shortTimeFormat_key);
     m_longDateFormat = regionValue(longDateFormat_key);
     buildConnect();