feat(client): initialize procurement tool skeleton

client/tests/test_runtime.py

@@ -0,0 +1,25 @@
+"""验证本地运行目录策略，不需要连接设备。"""
+
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+import tempfile
+import unittest
+
+
+CLIENT_ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(CLIENT_ROOT / "src"))
+
+from cmbuyer_client.runtime import RuntimePaths
+
+
+class RuntimePathsTests(unittest.TestCase):
+    def test_ensure_exists_creates_only_runtime_directories(self) -> None:
+        with tempfile.TemporaryDirectory() as directory:
+            paths = RuntimePaths.from_root(Path(directory) / "runtime")
+
+            paths.ensure_exists()
+
+            self.assertTrue(paths.logs.is_dir())
+            self.assertTrue(paths.artifacts.is_dir())