Cppcheck & clang-tidy fixes #382

Job	Run time
Code Linting / Format / Lint	7s
Linux / deb (release, Qt 6, ubuntu-22_04)	1m 53s
Linux / deb (release, Qt 6, ubuntu-24_04)	2m 2s
Linux / deb (release, Qt 6, ubuntu-24_10)	1m 43s
Linux / snap	4m 36s
Linux / AppImage (release, Qt 6, appimage-qt6)	2m 0s
Linux / rpm (release, Qt 6, fedora-41)	1m 58s
Linux / rpm (release, Qt 6, opensuse-15_6)	1m 51s
macOS / dmg (release, Qt 6.5.2, macos-13)	5m 54s
macOS / Build (debug, homebrew (qt6), macos-13)	2m 42s
Windows / Build (release, Qt 6.4.3, windows-2019)	2m 33s
Windows / Installer	36s
	27m 55s

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