fix(reimbursement): harden assistant draft and claim cleanup

server/tests/test_reimbursement_endpoints.py

@@ -158,6 +158,11 @@ def test_claim_item_attachment_upload_preview_and_delete(monkeypatch, tmp_path)
     assert upload_payload["attachment"]["document_info"]["document_type"] == "office_invoice"
     assert upload_payload["attachment"]["requirement_check"]["matches"] is True
     assert upload_payload["invoice_id"]
+    assert upload_payload["item_type"] == "office"
+    assert upload_payload["item_reason"] == "识别到办公用品发票，金额 88 元。"
+    assert upload_payload["item_location"] == "深圳南山"
+    assert upload_payload["item_date"] == "2026-05-13"
+    assert upload_payload["item_amount"] == "88.00"
 
     meta_response = client.get(
         f"/api/v1/reimbursements/claims/{claim_id}/items/{item_id}/attachment/meta",