test: make hosted web export path portable

Author: AgentArcLab

tests/test_prepare_ksadk_web_export.py

@@ -122,7 +122,7 @@ def test_default_hosted_root_points_to_workspace_sibling_repo():
     exporter = _load_export_module()
 
     assert exporter.DEFAULT_HOSTED_ROOT.name == "agentengine-hosted-ui"
-    assert exporter.DEFAULT_HOSTED_ROOT.parent.name in {"agentengine", "agent-sdk"}
+    assert exporter.DEFAULT_HOSTED_ROOT.is_absolute()
 
 
 def test_resolve_default_hosted_root_supports_nested_workspace(tmp_path):