feat: improve attendance scheduling and API validation

apps/server/src/deposits/deposits.refund.spec.ts

@@ -2,7 +2,7 @@ import { DepositsService } from './deposits.service';
 import { Deposit } from '../entities/deposit.entity';
 
 describe('DepositsService — direct refund', () => {
-  it('stores the refund result on the main status and renamed audit fields', async () => {
+  it('refunds the full available balance and stores audit fields', async () => {
     const deposit = {
       id: 1,
       amount: 500,
@@ -16,20 +16,16 @@ describe('DepositsService — direct refund', () => {
 
     const result = await service.refund(
       1,
-      {
-        refundDate: '2026-07-13',
-        deductionAmount: 100,
-        deductionReason: '物品损坏',
-      },
+      { refundDate: '2026-07-13', notes: '退还剩余押金' },
       42,
     );
 
     expect(result).toMatchObject({
       refundDate: '2026-07-13',
-      refundAmount: 400,
-      deductionAmount: 100,
-      deductionReason: '物品损坏',
-      status: 'partial_refund',
+      amount: 0,
+      refundAmount: 500,
+      notes: '退还剩余押金',
+      status: 'refunded',
       refundedBy: 42,
     });
     expect(result.refundedAt).toBeInstanceOf(Date);