Did not save the history and app config when not normally exit.

[dc-me]

Describe the bug
The default is close to system tray, and if you do a restart the history and app config is not saved, I haven't tried power off. this happens on all linux I think whether is flatpak or rpm or deb. There should be some way of doing this maybe every time close to system try do a save, or listening on before app kill to do the save.

To Reproduce
Open app, change some app config, do a system restart, when system up the app config back to previous, it did not save the config.

Affected Dictionaries

Expected behavior
More robost logic to handle the save of config and history.

Screenshots

OS and software versions

Goldendict-ng 24.05.05.ecd1138 at 2024-05-23T04:23:07Z
Qt 6.7.1 GCC 13.2.0 org.kde.Platform linux 6.8.8-300.fc40.x86_64 x86_64-little_endian-lp64
Flags: MAKE_ZIM_SUPPORT USE_ICONV MAKE_CHINESE_CONVERSION_SUPPORT

Additional context

Platform	Context
Windows	Upload the dmp file in the crash folder located in the configuration folder (can be opened through the menu help->configuration folder) to here
Macos	upload the crashpad crash log
Linux	gdb backtrace info

[shenlebantongying]

Duplicate of #1375

The root problem is that we don't have code that handles SIGTERM (and probably SIGKILL) yet.

Qt's aboutToQuit doesn't install SIGTERM handler, so it is unrelated.

It is not that simple because Qt methods cannot be called from signal handler.

Someone needs to read this page, then put together related code. https://doc.qt.io/qt-6/unix-signals.html

Or directly copy code from KDE

• https://api.kde.org/frameworks/kcoreaddons/html/classKSignalHandler.html
• https://api.kde.org/frameworks/kcoreaddons/html/ksignalhandler_8cpp_source.html

[shenlebantongying]

Abnormal exit is fixed by #1732