chore: import upstream snapshot with attribution

tests/scripts/test_cli_kit.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+import importlib.util
+import io
+from pathlib import Path
+import sys
+from unittest import mock
+
+
+def _load_cli_kit():
+    module_path = Path(__file__).resolve().parents[2] / "scripts" / "_cli_kit.py"
+    spec = importlib.util.spec_from_file_location("cli_kit_under_test", module_path)
+    assert spec and spec.loader
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
+def test_log_helpers_do_not_raise_on_legacy_windows_code_page() -> None:
+    buffer = io.BytesIO()
+    stdout = io.TextIOWrapper(buffer, encoding="cp936", errors="strict")
+
+    with mock.patch("sys.stdout", stdout):
+        cli_kit = _load_cli_kit()
+
+        assert sys.stdout.errors == "replace"
+        cli_kit.banner("DeepTutor", ["Backend http://localhost:8001"])
+        cli_kit.log_success("DeepTutor started")
+        cli_kit.log_error("DeepTutor failed")
+        stdout.flush()
+
+    assert buffer.getvalue()