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

frontend/src/app/(app)/settings/email/page.tsx

@@ -12,6 +12,7 @@ import {
   type EmailLogEntry,
 } from "@/lib/api";
 import { useAuth } from "@/lib/auth";
+import { formatDateTime } from "@/lib/format";
 import Modal from "@/components/Modal";
 
 const PLACEHOLDERS = [
@@ -415,7 +416,7 @@ export default function EmailPage() {
                   log.map((e) => (
                     <tr key={e.id}>
                       <td className="text-muted small">
-                        {new Date(e.createdAt).toLocaleString("es-CL")}
+                        {formatDateTime(e.createdAt)}
                       </td>
                       <td>
                         <code className="small">{e.template}</code>

frontend/src/app/(app)/tickets/[id]/page.tsx

@@ -6,6 +6,7 @@ import { useAuth } from "@/lib/auth";
 import {
   getTicket,
   getComments,
+  getTicketEmails,
   addComment,
   updateTicketStatus,
   assignTicket,
@@ -15,9 +16,12 @@ import {
   type Comment,
   type Group,
   type TeamMember,
+  type TicketSentEmail,
+  type TicketReceivedEmail,
 } from "@/lib/api";
 import BadgeStatus from "@/components/BadgeStatus";
 import BadgePriority from "@/components/BadgePriority";
+import { formatDateTime } from "@/lib/format";
 import Link from "next/link";
 
 const STATUS_OPTIONS = [
@@ -37,6 +41,8 @@ export default function TicketDetailPage() {
 
   const [ticket, setTicket] = useState<Ticket | null>(null);
   const [comments, setComments] = useState<Comment[]>([]);
+  const [sentEmails, setSentEmails] = useState<TicketSentEmail[]>([]);
+  const [receivedEmails, setReceivedEmails] = useState<TicketReceivedEmail[]>([]);
   const [groups, setGroups] = useState<Group[]>([]);
   const [team, setTeam] = useState<TeamMember[]>([]);
   const [loading, setLoading] = useState(true);
@@ -52,12 +58,15 @@ export default function TicketDetailPage() {
     Promise.all([
       getTicket(id).catch(() => null),
       getComments(id).catch(() => []),
+      getTicketEmails(id).catch(() => ({ sent: [], received: [] })),
       getGroups().catch(() => []),
       getTeam().catch(() => []),
     ])
-      .then(([ticketData, commentsData, groupsData, teamData]) => {
+      .then(([ticketData, commentsData, emailsData, groupsData, teamData]) => {
         setTicket(ticketData);
         setComments(commentsData);
+        setSentEmails(emailsData.sent ?? []);
+        setReceivedEmails(emailsData.received ?? []);
         setGroups(groupsData);
         setTeam(teamData);
       })
@@ -303,7 +312,7 @@ export default function TicketDetailPage() {
                       </div>
                       <div className="comment-text">{c.content}</div>
                       <div className="comment-time">
-                        {new Date(c.createdAt).toLocaleString("es-CL")}
+                        {formatDateTime(c.createdAt)}
                       </div>
                     </div>
                   </div>
@@ -317,6 +326,74 @@ export default function TicketDetailPage() {
             </div>
           </div>
 
+          {/* Historial de correos: enviados desde soporte + respuestas
+              recibidas, integrados al ticket (hilo email <-> ticket) */}
+          <div className="card mb-4">
+            <div className="card-header d-flex align-items-center gap-2">
+              <i className="bi bi-envelope-at" style={{ color: "var(--primary)" }}></i>
+              Historial de correos ({sentEmails.length + receivedEmails.length})
+            </div>
+            <div className="card-body" style={{ maxHeight: "400px", overflowY: "auto" }}>
+              {sentEmails.length === 0 && receivedEmails.length === 0 ? (
+                <div className="text-center text-muted py-4">
+                  <i className="bi bi-envelope fs-3 d-block mb-2" style={{ opacity: 0.3 }}></i>
+                  Sin correos asociados a este ticket
+                </div>
+              ) : (
+                [...sentEmails.map((e) => ({
+                  key: `sent-${e.id}`,
+                  dir: "sent" as const,
+                  who: e.recipient,
+                  subject: e.subject,
+                  extra: e.template,
+                  status: e.status,
+                  error: e.error,
+                  createdAt: e.createdAt,
+                })), ...receivedEmails.map((e, i) => ({
+                  key: `recv-${i}-${e.createdAt}`,
+                  dir: "received" as const,
+                  who: e.authorEmail,
+                  subject: e.subject,
+                  extra: e.status === "inserted" ? "Agregado como comentario" : (e.error || e.status),
+                  status: e.status,
+                  error: e.error,
+                  createdAt: e.createdAt,
+                }))]
+                  .sort((a, b) => +new Date(b.createdAt) - +new Date(a.createdAt))
+                  .map((m) => (
+                    <div key={m.key} className="d-flex gap-2 mb-3">
+                      <span
+                        className={`badge ${m.dir === "sent" ? "bg-primary" : "bg-success"} align-self-start mt-1`}
+                        title={m.dir === "sent" ? "Enviado desde soporte" : "Respuesta recibida"}
+                      >
+                        <i className={`bi ${m.dir === "sent" ? "bi-send" : "bi-inbox"}`}></i>
+                      </span>
+                      <div className="flex-grow-1">
+                        <div className="fw-semibold" style={{ fontSize: "0.85rem" }}>
+                          {m.dir === "sent" ? "Para: " : "De: "}{m.who}
+                        </div>
+                        <div className="text-muted" style={{ fontSize: "0.85rem" }}>{m.subject}</div>
+                        <div className="d-flex gap-2 align-items-center flex-wrap">
+                          <small className="text-muted">{formatDateTime(m.createdAt)}</small>
+                          <small className="text-muted">·</small>
+                          <small className="text-muted">{m.extra}</small>
+                          {m.status !== "sent" && m.status !== "inserted" && (
+                            <span className="badge bg-warning text-dark" title={m.error || ""}>
+                              {m.status}
+                            </span>
+                          )}
+                        </div>
+                      </div>
+                    </div>
+                  ))
+              )}
+              <small className="text-muted d-block mt-2">
+                Las respuestas con etiqueta HD-{String(id).padStart(6, "0")} en el asunto
+                se agregan solas como comentarios (ingesta cada 5 min).
+              </small>
+            </div>
+          </div>
+
           {/* Comment Form */}
           <div className="comment-form">
             <form onSubmit={handleAddComment}>
@@ -384,11 +461,11 @@ export default function TicketDetailPage() {
             </div>
             <div className="ticket-info-row">
               <span className="label">Creado</span>
-              <span className="value">{new Date(ticket.createdAt).toLocaleString("es-CL")}</span>
+              <span className="value">{formatDateTime(ticket.createdAt)}</span>
             </div>
             <div className="ticket-info-row">
               <span className="label">Actualizado</span>
-              <span className="value">{new Date(ticket.updatedAt).toLocaleString("es-CL")}</span>
+              <span className="value">{formatDateTime(ticket.updatedAt)}</span>
             </div>
           </div>
 

frontend/src/app/(app)/tickets/page.tsx

@@ -7,6 +7,7 @@ import { useAuth } from "@/lib/auth";
 import BadgeStatus from "@/components/BadgeStatus";
 import BadgePriority from "@/components/BadgePriority";
 import PaginationComponent from "@/components/Pagination";
+import { formatDate } from "@/lib/format";
 import Link from "next/link";
 
 export default function TicketsPage() {
@@ -204,7 +205,7 @@ export default function TicketsPage() {
                   <td><BadgePriority priority={ticket.priority} /></td>
                   <td>{ticket.assigneeName || <span className="text-muted">Sin asignar</span>}</td>
                   <td className="text-muted" style={{ fontSize: "0.85rem" }}>
-                    {new Date(ticket.updatedAt).toLocaleDateString("es-CL")}
+                    {formatDate(ticket.updatedAt)}
                   </td>
                 </tr>
               ))