feat: 完成错误原因合同与付款就绪提示（09-05-error-explainability-payment-readiness）

server/tests/unit/services/leave.test.js

@@ -47,7 +47,7 @@ describe("Leave Service", () => {
           startSession: "pm",
           endSession: "am",
         }),
-      ).toThrow(/参数校验失败/);
+      ).toThrow(expect.objectContaining({ code: "VALID_001", statusCode: 422, details: { leave: "invalid_range", reasonCode: "leave.leave_invalid_range" } }));
     });
   });
 
@@ -95,7 +95,7 @@ describe("Leave Service", () => {
           endSession: "pm",
           calendarDays: [],
         }),
-      ).toThrow(/参数校验失败/);
+      ).toThrow(expect.objectContaining({ code: "VALID_001", statusCode: 422, details: { leave: "non_working_range", reasonCode: "leave.leave_non_working_range" } }));
     });
   });