chore: import original project baseline

Import the pre-repair source tree as the history baseline.
Runtime data (data/), virtualenvs, bytecode caches and logs are
gitignored so local secrets and user state stay out of the repo.

tests/run_tests.py

@@ -0,0 +1,33 @@
+"""离线测试 harness（无 pytest 依赖）：
+运行: conda run -n haocode python tests/run_tests.py
+"""
+import importlib.util
+import os
+import sys
+import traceback
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
+
+spec = importlib.util.spec_from_file_location(
+    "test_agent_core", os.path.join(os.path.dirname(__file__), "test_agent_core.py"))
+mod = importlib.util.module_from_spec(spec)
+# 替换 pytest 依赖后加载
+import types
+_py_stub = types.ModuleType("pytest")
+sys.modules["pytest"] = _py_stub
+spec.loader.exec_module(mod)
+
+tests = [(n, f) for n, f in sorted(vars(mod).items())
+         if n.startswith("test_") and callable(f)]
+passed = failed = 0
+for name, fn in tests:
+    try:
+        fn()
+        print(f"  PASS  {name}")
+        passed += 1
+    except Exception:
+        print(f"  FAIL  {name}")
+        traceback.print_exc()
+        failed += 1
+print(f"\n===== {passed} passed, {failed} failed / {len(tests)} =====")
+sys.exit(1 if failed else 0)