feat: unlock test page

src/components/center.tsx

@@ -0,0 +1,21 @@
+import { Box, BoxProps } from "@mui/material";
+import React from "react";
+
+interface CenterProps extends BoxProps {
+  children: React.ReactNode;
+}
+
+export const Center: React.FC<CenterProps> = ({ children, ...props }) => {
+  return (
+    <Box
+      display="flex"
+      justifyContent="center"
+      alignItems="center"
+      width="100%"
+      height="100%"
+      {...props}
+    >
+      {children}
+    </Box>
+  );
+};