feat: render real ticket event timeline

backend/apps/tickets/api.py

@@ -16,6 +16,7 @@ from apps.tickets.schemas import (
     TicketAttachmentOut,
     TicketCommentIn,
     TicketCommentOut,
+    TicketEventOut,
     TicketIn,
     TicketListOut,
     TicketOut,
@@ -63,6 +64,18 @@ def serialize_ticket(ticket: Ticket) -> dict:
     }
 
 
+def serialize_ticket_event(event: TicketEvent) -> dict:
+    return {
+        "id": event.id,
+        "event_type": event.event_type,
+        "from_value": event.from_value,
+        "to_value": event.to_value,
+        "remark": event.remark,
+        "operator": serialize_ticket_user(event.operator),
+        "created_at": event.created_at,
+    }
+
+
 @router.post("", response=TicketOut)
 def create_ticket(request, payload: TicketIn):
     require_permission(request, "ticket.create")
@@ -85,6 +98,7 @@ def create_ticket(request, payload: TicketIn):
         ticket=ticket,
         event_type="created",
         to_value={"status": ticket.status},
+        operator=request.user if request.user.is_authenticated else None,
     )
     return serialize_ticket(ticket)
 
@@ -175,6 +189,13 @@ def get_ticket(request, ticket_id: int):
     )
 
 
+@router.get("/{ticket_id}/events", response=list[TicketEventOut])
+def list_ticket_events(request, ticket_id: int):
+    require_permission(request, "ticket.view")
+    events = TicketEvent.objects.select_related("operator").filter(ticket_id=ticket_id)
+    return [serialize_ticket_event(event) for event in events]
+
+
 @router.patch("/{ticket_id}", response=TicketOut)
 def update_ticket(request, ticket_id: int, payload: TicketUpdateIn):
     require_permission(request, "ticket.edit")
@@ -247,5 +268,6 @@ def add_ticket_attachment(request, ticket_id: int, payload: TicketAttachmentIn):
         ticket=ticket,
         event_type="attachment_added",
         to_value={"attachment_id": attachment.id, "file_name": attachment.file_name},
+        operator=request.user if request.user.is_authenticated else None,
     )
     return attachment