fix(trading): cart count status=101 识别为空车，区分空车与获取失败

scripts/verify_cart_empty.py

@@ -0,0 +1,51 @@
+"""真账号验证：空车场景下 cart_status / clear_cart 不再被误判为获取失败
+
+修复前行为（2026-08-16 探针实测）：空车时 cart count API 返回 status=101，
+_query_cart_count 一律当失败抛 CartOperationError → cart_status 报错 5002、
+clear_cart 末尾校验拿 cart_count=-1（runner 据此误判「开单前清理未清空」）。
+修复后：status=101 识别为合法空车，count=0。
+
+用法：
+    .venv/Scripts/python.exe scripts/verify_cart_empty.py
+"""
+from __future__ import annotations
+
+import asyncio
+import sys
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+from app.shared.config import get_settings  # noqa: E402
+from app.trading.services.auth_session import AuthSession  # noqa: E402
+from app.trading.worker.site_interact import SiteInteractor  # noqa: E402
+
+
+async def run() -> int:
+    settings = get_settings()
+    auth = AuthSession(settings)
+    await auth.start()
+    site = SiteInteractor(auth_session=auth, settings=settings)
+    await site.start()
+    try:
+        status = await site.cart_status()
+        print(f"cart_status -> {status}")
+        assert status["logged_in"] is True
+        assert status["count"] == 0, f"预期空车 count=0，实际 {status['count']}"
+        assert status["raw_status"] == "101", f"预期 raw_status=101，实际 {status['raw_status']}"
+
+        cleared = await site.clear_cart()
+        print(f"clear_cart  -> {cleared}")
+        assert cleared["cart_count"] == 0, (
+            f"空车 clear 后 cart_count 应为 0（修复前是 -1），实际 {cleared['cart_count']}"
+        )
+
+        print("\n验证通过：空车按正常结果返回（count=0 / raw_status=101），未误判为获取失败")
+        return 0
+    finally:
+        await site.close()
+        await auth.close()
+
+
+if __name__ == "__main__":
+    raise SystemExit(asyncio.run(run()))