feat: add OS information to tool descriptions and implement unit tests (#5677)

* feat: add OS information to tool descriptions and implement unit tests

* refactor: use module-level constant for OS name as suggested in PR review

tests/unit/test_python_tools.py

@@ -0,0 +1,17 @@
+import platform
+from astrbot.core.computer.tools.python import PythonTool, LocalPythonTool
+
+def test_python_tool_description_contains_os():
+    """测试 PythonTool 的描述中是否包含当前操作系统信息"""
+    tool = PythonTool()
+    current_os = platform.system()
+    assert current_os in tool.description
+    assert "IPython" in tool.description
+
+def test_local_python_tool_description_contains_os():
+    """测试 LocalPythonTool 的描述中是否包含当前操作系统信息和兼容性提示"""
+    tool = LocalPythonTool()
+    current_os = platform.system()
+    assert current_os in tool.description
+    assert "Python environment" in tool.description
+    assert "system-compatible" in tool.description