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

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

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

@@ -0,0 +1,32 @@
+import type { RequestHandler } from './$types';
+import { json, error } from '@sveltejs/kit';
+import { z } from 'zod';
+import { getDb } from '$lib/server/db';
+import { addDomain, listDomains } from '$lib/server/domains/repository';
+
+const CreateSchema = z.object({
+  domain: z.string().min(3).max(253),
+  display_name: z.string().max(100).nullable().optional(),
+  added_by_profile_id: z.number().int().positive().nullable().optional()
+});
+
+export const GET: RequestHandler = async () => {
+  return json(listDomains(getDb()));
+};
+
+export const POST: RequestHandler = async ({ request }) => {
+  const body = await request.json().catch(() => null);
+  const parsed = CreateSchema.safeParse(body);
+  if (!parsed.success) error(400, { message: 'Invalid body' });
+  try {
+    const d = addDomain(
+      getDb(),
+      parsed.data.domain,
+      parsed.data.display_name ?? null,
+      parsed.data.added_by_profile_id ?? null
+    );
+    return json(d, { status: 201 });
+  } catch (e) {
+    error(409, { message: (e as Error).message });
+  }
+};