fix popup header

src/views/Options/DarkModeButton.js

@@ -0,0 +1,13 @@
+import IconButton from "@mui/material/IconButton";
+import { useDarkMode } from "../../hooks/ColorMode";
+import LightModeIcon from "@mui/icons-material/LightMode";
+import DarkModeIcon from "@mui/icons-material/DarkMode";
+
+export default function DarkModeButton() {
+  const { darkMode, toggleDarkMode } = useDarkMode();
+  return (
+    <IconButton onClick={toggleDarkMode} color="inherit">
+      {darkMode ? <LightModeIcon /> : <DarkModeIcon />}
+    </IconButton>
+  );
+}