refactor: reorganize backend module boundaries

tests/test_main_direct_execution.py

@@ -9,13 +9,13 @@ MAIN_PATH = PROJECT_ROOT / "app" / "main.py"
 
 
 def test_main_script_does_not_shadow_stdlib_platform(tmp_path):
-    """PyCharm 脚本启动路径不得让 app/platform 遮蔽标准库 platform。"""
+    """PyCharm 脚本启动路径必须解析到标准库 platform。"""
     probe = "\n".join(
         (
             "import runpy",
             "import sys",
-            # CI 无 app.infrastructure.sites 二进制模块，先补垫片再执行 main.py（与 conftest 同源）；
-            # 必须在篡改 sys.path / 摘除 platform 之前调用，避免真实模块依赖链误引被遮蔽的 app/platform。
+            # CI 无 app.application.site.sites 二进制模块，先补垫片再执行 main.py（与 conftest 同源）；
+            # 必须在篡改 sys.path / 摘除 platform 之前调用，避免真实依赖链受探针环境影响。
             "from app.testing.bootstrap import ensure_sites_stub",
             "ensure_sites_stub()",
             f"sys.path.insert(0, {str(MAIN_PATH.parent)!r})",
@@ -23,7 +23,7 @@ def test_main_script_does_not_shadow_stdlib_platform(tmp_path):
             f"runpy.run_path({str(MAIN_PATH)!r}, run_name='pycharm_main_probe')",
             "import platform",
             "assert hasattr(platform, 'python_implementation')",
-            "assert '/app/platform/' not in str(getattr(platform, '__file__', ''))",
+            f"assert {str(MAIN_PATH.parent)!r} not in str(getattr(platform, '__file__', ''))",
         )
     )
     env = {