Preserve running session replay state

tests/test_gui_server.py

@@ -238,6 +238,25 @@ class GuiServerTests(unittest.TestCase):
             self.assertEqual(latest.status_code, 200)
             self.assertEqual(latest.json()['status'], 'cancelled')
 
+    def test_latest_run_prefers_running_over_queued_for_session(self) -> None:
+        with tempfile.TemporaryDirectory() as d:
+            client, state = _build_client(Path(d))
+            first = state.run_manager.start('alice', 'thread-1')
+            state.run_manager.update(first.run_id, status='running', stage='first stage')
+            second = state.run_manager.start('alice', 'thread-1')
+            self.assertEqual(second.status, 'queued')
+
+            latest = client.get(
+                '/api/runs/latest',
+                params={'account_id': 'alice', 'session_id': 'thread-1'},
+            )
+
+            self.assertEqual(latest.status_code, 200)
+            payload = latest.json()
+            self.assertEqual(payload['run_id'], first.run_id)
+            self.assertEqual(payload['status'], 'running')
+            self.assertEqual(payload['current_stage'], 'first stage')
+
     def test_chat_uses_account_scoped_model_config(self) -> None:
         with tempfile.TemporaryDirectory() as d:
             client, _ = _build_client(Path(d))