fix(header): change header component to h1

fix(notfound): add footer component to NotFoundPage

Author: MarkusNeusinger

app/src/components/Header.tsx

@@ -87,7 +87,7 @@ export const Header = memo(function Header({ stats, onRandom }: HeaderProps) {
     <Box component="header" sx={{ textAlign: 'center', mb: 4 }}>
       <Typography
         variant="h2"
-        component="div"
+        component="h1"
         sx={{
           fontWeight: 700,
           fontFamily: '"MonoLisa", "MonoLisa Fallback", monospace',

app/src/pages/NotFoundPage.tsx

@@ -2,6 +2,7 @@ import { Link } from 'react-router-dom';
 import { Helmet } from 'react-helmet-async';
 import Box from '@mui/material/Box';
 import Typography from '@mui/material/Typography';
+import { Footer } from '../components';
 
 export function NotFoundPage() {
   return (
@@ -29,6 +30,7 @@ export function NotFoundPage() {
           back to pyplots.ai
         </Box>
       </Box>
+      <Footer />
     </>
   );
 }