feat: render real ticket event timeline

backend/apps/tickets/tests/test_ticket_api.py

@@ -127,3 +127,38 @@ def test_transition_ticket_requires_non_empty_remark(admin_client, db):
     )
 
     assert response.status_code == 400
+
+
+def test_get_ticket_events_returns_real_timeline_with_operator(admin_client, db):
+    user_model = get_user_model()
+    operator = user_model.objects.get(username="admin")
+    ticket = Ticket.objects.create(
+        ticket_no="TK202607020200",
+        title="A",
+        description="A",
+        status="in_progress",
+    )
+    TicketEvent.objects.create(
+        ticket=ticket,
+        event_type="created",
+        to_value={"status": "pending"},
+        operator=operator,
+    )
+    TicketEvent.objects.create(
+        ticket=ticket,
+        event_type="status_change",
+        from_value={"status": "pending"},
+        to_value={"status": "in_progress"},
+        operator=operator,
+        remark="开始排查认证链路",
+    )
+
+    response = admin_client.get(f"/api/tickets/{ticket.id}/events")
+
+    assert response.status_code == 200
+    payload = response.json()
+    assert [event["event_type"] for event in payload] == ["created", "status_change"]
+    assert payload[1]["from_value"] == {"status": "pending"}
+    assert payload[1]["to_value"] == {"status": "in_progress"}
+    assert payload[1]["remark"] == "开始排查认证链路"
+    assert payload[1]["operator"]["display_name"] == "admin"