feat(cfdi): add autocomplete for emisor and receptor filters

- Add /cfdi/emisores and /cfdi/receptores API endpoints
- Search by RFC or nombre with ILIKE
- Show suggestions dropdown while typing (min 2 chars)
- Click suggestion to select and populate filter input
- Show loading state while searching

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/web/lib/api/cfdi.ts

@@ -98,3 +98,20 @@ export async function getCfdiXml(id: string): Promise<string> {
   });
   return response.data;
 }
+
+export interface EmisorReceptor {
+  rfc: string;
+  nombre: string;
+}
+
+export async function searchEmisores(search: string): Promise<EmisorReceptor[]> {
+  if (search.length < 2) return [];
+  const response = await apiClient.get<EmisorReceptor[]>(`/cfdi/emisores?search=${encodeURIComponent(search)}`);
+  return response.data;
+}
+
+export async function searchReceptores(search: string): Promise<EmisorReceptor[]> {
+  if (search.length < 2) return [];
+  const response = await apiClient.get<EmisorReceptor[]>(`/cfdi/receptores?search=${encodeURIComponent(search)}`);
+  return response.data;
+}