feat(api): expose preview/import/profile/domain endpoints

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/routes/api/domains/[id]/+server.ts

@@ -0,0 +1,11 @@
+import type { RequestHandler } from './$types';
+import { json, error } from '@sveltejs/kit';
+import { getDb } from '$lib/server/db';
+import { removeDomain } from '$lib/server/domains/repository';
+
+export const DELETE: RequestHandler = async ({ params }) => {
+  const id = Number(params.id);
+  if (!Number.isInteger(id) || id <= 0) error(400, { message: 'Invalid id' });
+  removeDomain(getDb(), id);
+  return json({ ok: true });
+};