fix: remediate branch review findings

src/routes/api/offline-snapshot/+server.ts

@@ -0,0 +1,42 @@
+import { json, type RequestEvent } from '@sveltejs/kit';
+import CombinedDataRepository from '$lib/repositories/CombinedDataRepository';
+import PokedexRepository from '$lib/repositories/PokedexRepository';
+import { resolveDexScopes } from '$lib/services/PokedexDexScopeService';
+import { OFFLINE_SNAPSHOT_VERSION, type OfflineSnapshot } from '$lib/models/OfflineSnapshot';
+import { requireAuth } from '$lib/utils/auth';
+
+export const GET = async (event: RequestEvent) => {
+	try {
+		const userId = await requireAuth(event);
+		const pokedexes = await new PokedexRepository(event.locals.supabase, userId).findAll();
+		const snapshots = await Promise.all(
+			pokedexes.map(async (pokedex) => {
+				const dexScopes = await resolveDexScopes(event.locals.supabase, pokedex);
+				const entries = await new CombinedDataRepository(
+					event.locals.supabase,
+					userId,
+					pokedex._id
+				).findAllCombinedData(userId, pokedex.isFormDex, '', pokedex.gameScope ?? '', dexScopes);
+				return { pokedex: { ...pokedex, dexScopes }, entries };
+			})
+		);
+
+		const snapshot: OfflineSnapshot = {
+			version: OFFLINE_SNAPSHOT_VERSION,
+			generatedAt: new Date().toISOString(),
+			userId,
+			pokedexes: snapshots
+		};
+
+		return json(snapshot, {
+			headers: {
+				'Cache-Control': 'private, no-store',
+				Vary: 'Cookie'
+			}
+		});
+	} catch (error) {
+		console.error('Unable to build offline snapshot:', error);
+		if (error && typeof error === 'object' && 'status' in error) throw error;
+		return json({ error: 'Unable to build offline snapshot' }, { status: 500 });
+	}
+};