fix(box): tighten sandbox exposure and restore box integration coverage

tests/unit_tests/provider/test_localagent_sandbox_exec.py

@@ -1,22 +1,16 @@
 from __future__ import annotations
 
+import json
+from types import SimpleNamespace
+from unittest.mock import AsyncMock, Mock
+
 import pytest
 
-# TODO: unskip once runner.py adopts TYPE_CHECKING guard to break the circular import
-pytest.skip(
-    'circular import between runner ↔ app; will be unblocked once resolved',
-    allow_module_level=True,
-)
+import langbot_plugin.api.entities.builtin.pipeline.query as pipeline_query
+import langbot_plugin.api.entities.builtin.provider.message as provider_message
+import langbot_plugin.api.entities.builtin.provider.session as provider_session
 
-import json  # noqa: E402
-from types import SimpleNamespace  # noqa: E402
-from unittest.mock import AsyncMock, Mock  # noqa: E402
-
-import langbot_plugin.api.entities.builtin.pipeline.query as pipeline_query  # noqa: E402
-import langbot_plugin.api.entities.builtin.provider.message as provider_message  # noqa: E402
-import langbot_plugin.api.entities.builtin.provider.session as provider_session  # noqa: E402
-
-from langbot.pkg.provider.runners.localagent import LocalAgentRunner  # noqa: E402
+from langbot.pkg.provider.runners.localagent import LocalAgentRunner
 
 
 class RecordingProvider:
@@ -168,6 +162,8 @@ async def test_localagent_uses_sandbox_exec_for_exact_calculation():
                 return_value=(
                     'When sandbox_exec is available, use it for exact calculations, statistics, '
                     'structured data parsing, and code execution instead of estimating mentally. '
+                    'Unless the user explicitly asks for the script, code, or implementation details, '
+                    'do not include the generated script in the final answer. '
                     'A default host workspace is mounted at /workspace for file tasks.'
                 )
             ),