fix: preserve tasks when archiving lists

tests/test_app.py

@@ -314,15 +314,25 @@ def test_inbox_is_protected_and_deleted_collections_are_hidden(client):
     task = client.post(
         "/api/v1/tasks", json={"title": "保留任务", "list_id": task_list["id"]}
     ).json()
+    completed_task = client.post(
+        "/api/v1/tasks", json={"title": "已完成任务", "list_id": task_list["id"]}
+    ).json()
+    completed_task = client.patch(
+        f"/api/v1/tasks/{completed_task['id']}",
+        json={"completed": True, "version": completed_task["version"]},
+    ).json()
     assert client.delete(f"/api/v1/lists/{task_list['id']}").status_code == 204
     assert all(row["id"] != task_list["id"] for row in client.get("/api/v1/lists").json())
+    assert client.get("/api/v1/tasks", params={"q": "保留任务"}).json()["items"] == []
+    assert client.get(f"/api/v1/tasks/{task['id']}").status_code == 404
     archived = client.get("/api/v1/lists", params={"archived": True})
     assert archived.status_code == 200
     assert [row["id"] for row in archived.json()] == [task_list["id"]]
     assert client.post(f"/api/v1/lists/{task_list['id']}/restore").status_code == 200
     assert any(row["id"] == task_list["id"] for row in client.get("/api/v1/lists").json())
-    moved = client.get(f"/api/v1/tasks/{task['id']}").json()
-    assert moved["list_id"] == inbox["id"]
+    restored = client.get("/api/v1/tasks", params={"list_id": task_list["id"]}).json()["items"]
+    assert [row["id"] for row in restored] == [task["id"], completed_task["id"]]
+    assert restored[1]["completed"] is True
     assert client.delete(f"/api/v1/folders/{folder['id']}").status_code == 204
     assert client.get("/api/v1/folders").json() == []