qt/linux: also bundle Wayland platform libs to support Wayland

Without these two libraries present, the app will not run natively
under Wayland, and only under XWayland (X11 emulator on Wayland). The
latter can cause problems, like a slightly blurry app contents. By
shipping the libraries, the app should be able to run natively on
Wayland.

frontends/qt/Makefile

@@ -35,6 +35,13 @@ linux:
 	cp -aR resources/linux build/tmp-deb
 	cp resources/linux/usr/share/applications/bitbox.desktop build/linux-tmp
 	cp resources/linux/usr/share/icons/hicolor/128x128/apps/bitbox.png build/linux-tmp
+	# Add Wayland libs so the app can run natively on Wayland too.
+	# Use env `QT_QPA_PLATFORM=wayland` to force Wayland.
+	# linuxdeployqt unfortunately refuses to support it: https://github.com/probonopd/linuxdeployqt/issues/189
+	cp $(shell qmake -query QT_INSTALL_LIBS)/libQt6WaylandClient.so.6 build/linux-tmp/lib/
+	cp $(shell qmake -query QT_INSTALL_PLUGINS)/platforms/libqwayland-generic.so build/linux-tmp/plugins/platforms/
+	chrpath -c -r '$$ORIGIN/../../lib' build/linux-tmp/plugins/platforms/libqwayland-generic.so
+	# Done with Wayland libs.
 	mkdir build/tmp-deb/opt/
 	cp -aR build/linux-tmp build/tmp-deb/opt/bitbox
 	cd build/linux && fpm --after-install ../../resources/deb-afterinstall.sh -s dir -t deb -n bitbox -v 4.46.3 -C ../tmp-deb/