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

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

src/lib/server/errors.ts

@@ -0,0 +1,17 @@
+import { error } from '@sveltejs/kit';
+import { ImporterError } from './recipes/importer';
+
+export function mapImporterError(e: unknown): never {
+  if (e instanceof ImporterError) {
+    const status =
+      e.code === 'INVALID_URL' || e.code === 'DOMAIN_BLOCKED'
+        ? e.code === 'DOMAIN_BLOCKED'
+          ? 403
+          : 400
+        : e.code === 'NO_RECIPE_FOUND'
+          ? 422
+          : 502; // FETCH_FAILED
+    error(status, { message: e.message, code: e.code });
+  }
+  throw e;
+}