Improve error display

web/app/ui/error-display.tsx

@@ -0,0 +1,13 @@
+import { Stack, Text } from "@mantine/core";
+import { IconAlertTriangle } from "@tabler/icons-react";
+
+export default function ErrorDisplay({ error }: { error: string }) {
+  return (
+    <Stack align="center" justify="center" h="100%" m="0" p="0">
+      <Text c="red">
+        <IconAlertTriangle size="3rem" />
+      </Text>
+      <Text c="red">{error}</Text>
+    </Stack>
+  );
+}