feat: historial de correos en ticket + fechas fijas a America/Santiago

frontend/src/lib/api.ts

@@ -129,6 +129,35 @@ export async function addComment(
   });
 }
 
+// ==================== Historial de correos del ticket ====================
+// Integración email <-> ticket: enviados desde soporte (mail.log) +
+// respuestas recibidas (helpdesk.email_inbound). Visible para quien
+// puede ver el ticket (equipo + solicitante).
+export interface TicketSentEmail {
+  id: number;
+  template: string;
+  recipient: string;
+  subject: string;
+  status: string;
+  error?: string;
+  createdAt: string;
+}
+
+export interface TicketReceivedEmail {
+  authorId?: string;
+  authorEmail: string;
+  subject: string;
+  status: string;
+  error?: string;
+  createdAt: string;
+}
+
+export async function getTicketEmails(ticketId: number) {
+  return fetchApi<{ sent: TicketSentEmail[]; received: TicketReceivedEmail[] }>(
+    `/api/helpdesk/ticket/${ticketId}/emails`
+  );
+}
+
 // ==================== Knowledge Base ====================
 export async function getKBArticles() {
   return fetchApi<KBArticle[]>("/api/helpdesk/kb/published");