Better avoidance of a force-dark function

Many browsers have a forced dark mode feature for websites that only support light mode
The force dark mode function should be disabled for this website, as it supports mode switching.
This feature helps browsers detect that the website supports dark-mode and disable force dark.

res/huroutes.css

@@ -2,6 +2,9 @@
  * Page generics
  */
 
+:root {
+  color-scheme: light dark;
+}
 body {
   font-size: 14px;
   overflow-x: hidden;