1/n Fixing dark mode

crates/librqbit/webui/src/helper/darkMode.ts

@@ -0,0 +1,21 @@
+let darkMode = window.matchMedia("(prefers-color-scheme: dark)").matches;
+
+window
+  .matchMedia("(prefers-color-scheme: dark)")
+  .addEventListener("change", (event) => {
+    DarkMode.setDark(event.matches);
+  });
+
+export const DarkMode = {
+  isDark: () => darkMode,
+  setDark: (value: boolean) => {
+    darkMode = value;
+    document.body.classList.toggle("dark", darkMode);
+    return darkMode;
+  },
+  toggle: () => {
+    DarkMode.setDark(!darkMode);
+  },
+};
+
+DarkMode.setDark(darkMode);