feat(tickets): complete governed ticket workspace

webui/src/api/tickets.ts

@@ -65,6 +65,15 @@ export type TicketAvailability = {
   consequences: Record<string, string>;
 };
 
+export type TicketHistoryEntry = {
+  revision: number;
+  event_type: string;
+  occurred_at: string;
+  actor_id?: string | null;
+  reason: string;
+  details: Record<string, unknown>;
+};
+
 export function listTickets(
   settings: ApiSettings,
   options: { statuses?: string[]; priorities?: string[]; ticketTypes?: string[]; queueRef?: string; query?: string; limit?: number },
@@ -84,6 +93,14 @@ export function getTicketAvailability(settings: ApiSettings, signal?: AbortSigna
   return apiFetch(settings, "/api/v1/tickets/availability", { signal });
 }
 
+export function getTicket(settings: ApiSettings, ticketId: string, signal?: AbortSignal): Promise<TicketRecord> {
+  return apiFetch(settings, `/api/v1/tickets/${encodeURIComponent(ticketId)}`, { signal });
+}
+
+export function listTicketHistory(settings: ApiSettings, ticketId: string, signal?: AbortSignal): Promise<{ history: TicketHistoryEntry[] }> {
+  return apiFetch(settings, `/api/v1/tickets/${encodeURIComponent(ticketId)}/history`, { signal });
+}
+
 export function createTicket(settings: ApiSettings, record: TicketRecord): Promise<TicketRecord> {
   return apiFetch(settings, "/api/v1/tickets", {
     method: "POST",
@@ -114,6 +131,27 @@ export function assignTicket(settings: ApiSettings, record: TicketRecord, assign
   });
 }
 
+export function replaceTicketParticipants(settings: ApiSettings, record: TicketRecord, participants: TicketSubject[], changeReason: string): Promise<TicketRecord> {
+  return apiFetch(settings, `/api/v1/tickets/${encodeURIComponent(record.ticket_id)}/participants`, {
+    method: "PUT",
+    body: JSON.stringify({ ...mutation(record, changeReason), participants })
+  });
+}
+
+export function addTicketLink(settings: ApiSettings, record: TicketRecord, link: TicketLink, changeReason: string): Promise<TicketRecord> {
+  return apiFetch(settings, `/api/v1/tickets/${encodeURIComponent(record.ticket_id)}/links`, {
+    method: "POST",
+    body: JSON.stringify({ ...mutation(record, changeReason), link })
+  });
+}
+
+export function removeTicketLink(settings: ApiSettings, record: TicketRecord, linkId: string, changeReason: string): Promise<TicketRecord> {
+  return apiFetch(settings, `/api/v1/tickets/${encodeURIComponent(record.ticket_id)}/links/${encodeURIComponent(linkId)}`, {
+    method: "DELETE",
+    body: JSON.stringify({ ...mutation(record, changeReason), changes: {} })
+  });
+}
+
 export function resolveTicket(
   settings: ApiSettings,
   record: TicketRecord,
@@ -153,3 +191,15 @@ export function escalateTicket(settings: ApiSettings, record: TicketRecord, case
     })
   }) as Promise<{ ticket: TicketRecord; escalation: Record<string, unknown> }>;
 }
+
+export function deleteTicket(settings: ApiSettings, record: TicketRecord, reason: string): Promise<TicketRecord> {
+  return apiFetch(settings, `/api/v1/tickets/${encodeURIComponent(record.ticket_id)}`, {
+    method: "DELETE",
+    body: JSON.stringify({
+      expected_revision: record.revision,
+      occurred_at: new Date().toISOString(),
+      reason,
+      idempotency_key: crypto.randomUUID()
+    })
+  });
+}