[openstreetmap/openstreetmap-website] Add user profile heatmap visualization for contributions (PR #5402)

[Holger Jeromin]

@HolgerJeromin commented on this pull request.



> +function getThemeFromColorScheme(colorScheme) {
+  if (colorScheme === "auto") {
+    return window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light";
+  }
+  return colorScheme; // Return "light" or "dark" directly if specified
+}

`getThemeFromColorScheme` returns the correct theme. Yes. 
But it is only called on load (`DOMContentLoaded`) and not when the user changes operating system theme.

Missing something like:
`window.matchMedia("(prefers-color-scheme: dark)").addEventListener("change", xy);`


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