feat(pokedex): add shareable read-only dex links

src/routes/shared/[token]/preview.png/+server.ts

@@ -0,0 +1,18 @@
+import { error } from '@sveltejs/kit';
+import { loadSharedPokedex } from '$lib/services/SharedPokedexService';
+import { renderSharePreview } from '$lib/services/SharePreviewService';
+import type { RequestHandler } from './$types';
+
+export const GET: RequestHandler = async ({ locals, params }) => {
+	const shared = await loadSharedPokedex(locals.supabase, params.token);
+	if (!shared) throw error(404, 'Shared Pokédex not found');
+
+	const image = await renderSharePreview(shared);
+	return new Response(image, {
+		headers: {
+			'Content-Type': 'image/png',
+			'Cache-Control': 'public, max-age=300, stale-while-revalidate=600',
+			'Content-Length': String(image.byteLength)
+		}
+	});
+};