Improve text visibility in atom and dusk themes

- Add CSS variable support to dusk theme components for dynamic text colors
- Fix low-contrast preset color combinations (cyberpunk, neon, magma, forest, obsidian, space)
- Add text-shadow utility classes and apply to site header and backgrounds
- Style logout buttons as proper buttons matching other button styles
- Fix hardcoded text colors in atom theme components

resources/themes/dusk/views/components/footer.blade.php

@@ -1,4 +1,4 @@
-<footer class="w-full h-14 flex items-center justify-center bg-gray-900 text-gray-500 font-bold cursor-pointer transition duration-200 ease-in-out hover:text-gray-400" onclick="showFooter()">
+<footer class="w-full h-14 flex items-center justify-center font-bold cursor-pointer transition duration-200 ease-in-out site-footer" style="color: var(--color-text-muted); background-color: var(--color-surface);" onclick="showFooter()">
     &copy {{ date('Y') }} {{ setting('hotel_name') }} is a not for profit educational project & is in no way affiliated with Sulake Corporation Oy.
 </footer>