feat: Crumbs by Bretzel — self-hostable notes app MVP

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/routes/api/sync/+server.ts

@@ -0,0 +1,20 @@
+import { json } from '@sveltejs/kit';
+import type { RequestHandler } from './$types.js';
+import { processSyncPush, getChangesSince } from '$lib/sync/server.js';
+
+export const POST: RequestHandler = async ({ request }) => {
+	const { changes } = await request.json();
+
+	if (!Array.isArray(changes)) {
+		return json({ error: 'Invalid changes' }, { status: 400 });
+	}
+
+	await processSyncPush(changes);
+	return json({ success: true });
+};
+
+export const GET: RequestHandler = async ({ url }) => {
+	const since = parseInt(url.searchParams.get('since') || '0', 10);
+	const changes = await getChangesSince(since);
+	return json(changes);
+};