feat(shopping): DELETE /api/shopping-list/checked (Erledigte entfernen)

src/routes/api/shopping-list/checked/+server.ts

@@ -0,0 +1,9 @@
+import type { RequestHandler } from './$types';
+import { json } from '@sveltejs/kit';
+import { getDb } from '$lib/server/db';
+import { clearCheckedItems } from '$lib/server/shopping/repository';
+
+export const DELETE: RequestHandler = async () => {
+  clearCheckedItems(getDb());
+  return json({ ok: true });
+};