Persist active run event history

tests/test_gui_server.py

@@ -262,6 +262,43 @@ class GuiServerTests(unittest.TestCase):
             self.assertEqual(payload['status'], 'running')
             self.assertEqual(payload['current_stage'], 'first stage')
 
+    def test_latest_run_includes_runtime_event_history(self) -> None:
+        with tempfile.TemporaryDirectory() as d:
+            client, state = _build_client(Path(d))
+            record = state.run_manager.start('alice', 'thread-1')
+            state.run_manager.update(record.run_id, status='running')
+            state.run_manager.record_event(
+                record.run_id,
+                {
+                    'type': 'tool_start',
+                    'tool_name': 'python_exec',
+                    'tool_call_id': 'call-1',
+                    'arguments': {'code': 'print(1)'},
+                    'assistant_content': '我用 Python 分析一下。',
+                },
+            )
+            state.run_manager.record_event(
+                record.run_id,
+                {
+                    'type': 'tool_result',
+                    'tool_name': 'python_exec',
+                    'tool_call_id': 'call-1',
+                    'ok': True,
+                    'metadata': {'output_preview': 'exit_code=0'},
+                },
+            )
+
+            latest = client.get(
+                '/api/runs/latest',
+                params={'account_id': 'alice', 'session_id': 'thread-1'},
+            )
+
+            self.assertEqual(latest.status_code, 200)
+            events = latest.json()['events']
+            self.assertEqual([event['type'] for event in events], ['tool_start', 'tool_result'])
+            self.assertEqual(events[0]['tool_name'], 'python_exec')
+            self.assertEqual(events[1]['metadata']['output_preview'], 'exit_code=0')
+
     def test_cancel_run_marks_streaming_session_tail_cancelled(self) -> None:
         with tempfile.TemporaryDirectory() as d:
             root = Path(d)