I would like the toolbar to be centered and support automatic theme switching

[sr79368142]

As mentioned, a small improvement in interface display would greatly enhance user comfort.
A centered toolbar would make the entire window more aesthetically pleasing.
QT already supports automatic theme switching—simply enable the built-in Fusion and Windows 11 themes.
Automatically switching between light/dark themes during daytime and nighttime is highly beneficial for users. Dear @kanryu , please consider this suggestion—thank you very much!
Additionally, I've applied the Simplified Chinese localization and attached it below. Please accept this timely update. 😊😊😊

translations-Simplified-Chinese-20251028.zip

[kanryu]

@sr79368142 thank you!

I've adopted your translation resource.
QuickViewer has a classic look now and I have no plans to change it, but I find your suggestion interesting. :)

[kanryu]

I made it! :)