add full page width preference

apps/client/src/features/user/components/page-width-pref.tsx

@@ -0,0 +1,42 @@
+import { Group, Text, Switch } from "@mantine/core";
+import { useAtom } from "jotai/index";
+import { userAtom } from "@/features/user/atoms/current-user-atom.ts";
+import { updateUser } from "@/features/user/services/user-service.ts";
+import React, { useState } from "react";
+
+export default function PageWidthPref() {
+  return (
+    <Group justify="space-between" wrap="nowrap" gap="xl">
+      <div>
+        <Text size="md">Full page width</Text>
+        <Text size="sm" c="dimmed">
+          Choose your preferred page width.
+        </Text>
+      </div>
+
+      <WidthToggle />
+    </Group>
+  );
+}
+
+function WidthToggle() {
+  const [user, setUser] = useAtom(userAtom);
+  const [checked, setChecked] = useState(
+    user.settings?.preferences?.fullPageWidth,
+  );
+
+  const handleChange = async (event: React.ChangeEvent<HTMLInputElement>) => {
+    const value = event.currentTarget.checked;
+    const updatedUser = await updateUser({ fullPageWidth: value });
+    setChecked(value);
+    setUser(updatedUser);
+  };
+
+  return (
+    <Switch
+      defaultChecked={checked}
+      onChange={handleChange}
+      aria-label="Toggle full page width"
+    />
+  );
+}