[FA-misc] Switches to using DTOs, updates frontend with details and reader page, updates novel import to be an upsert

fictionarchive-web-astro/src/pages/gated-404.astro

@@ -0,0 +1,22 @@
+---
+// Internal route used by middleware for unauthenticated users
+Astro.response.status = 404;
+
+import GatedLayout from '../layouts/GatedLayout.astro';
+import { Card, CardContent, CardHeader, CardTitle } from '../lib/components/ui/card';
+---
+
+<GatedLayout title="Not Found - FictionArchive">
+	<div class="flex min-h-[50vh] items-center justify-center">
+		<Card class="mx-auto max-w-md text-center shadow-md shadow-primary/10">
+			<CardHeader>
+				<CardTitle class="text-4xl font-bold">404</CardTitle>
+			</CardHeader>
+			<CardContent class="space-y-4">
+				<p class="text-muted-foreground">
+					The page you're looking for doesn't exist or has been moved.
+				</p>
+			</CardContent>
+		</Card>
+	</div>
+</GatedLayout>