feat: router, tab shell, setup and login pages

web/src/pages/SettingsPage.tsx

@@ -0,0 +1,14 @@
+import { useAuth } from '../auth'
+
+export default function SettingsPage() {
+  const { user, onLogout } = useAuth()
+  return (
+    <section>
+      <h2 className="mb-2 text-sm font-semibold uppercase tracking-wide text-neutral-400">Settings</h2>
+      <p>Account</p>
+      <p className="text-neutral-400">
+        {user?.username} {user?.isAdmin ? '(admin)' : ''}
+      </p>
+    </section>
+  )
+}