fix(admin): complete occupancy check-in form payload

apps/admin/src/pages/Occupancies/occupancy-form.integration.test.ts

@@ -1,6 +1,54 @@
 import { describe, expect, it } from 'vitest';
 import dayjs from 'dayjs';
-import { buildTransferPayload } from './occupancy-form';
+import { buildCheckInPayload, buildTransferPayload } from './occupancy-form';
+
+describe('occupancy check-in form', () => {
+  it('submits all required manual check-in fields with defaults', () => {
+    expect(
+      buildCheckInPayload({
+        studentId: 1,
+        roomId: 2,
+        checkInDate: dayjs('2026-07-18'),
+        billingStartDate: dayjs('2026-07-18'),
+        stayType: 'short',
+        collectDeposit: true,
+        depositAmount: 500,
+        bedId: 3,
+        notes: '  备注  ',
+      }),
+    ).toEqual({
+      studentId: 1,
+      roomId: 2,
+      checkInDate: '2026-07-18',
+      billingStartDate: '2026-07-18',
+      stayType: 'short',
+      collectDeposit: true,
+      depositAmount: 500,
+      notes: '备注',
+      bedId: 3,
+      lockerId: undefined,
+    });
+  });
+
+  it('falls back to check-in date and short stay type', () => {
+    expect(
+      buildCheckInPayload({
+        studentId: 1,
+        roomId: 2,
+        checkInDate: dayjs('2026-07-18'),
+        collectDeposit: false,
+        bedId: 3,
+      }),
+    ).toEqual(
+      expect.objectContaining({
+        billingStartDate: '2026-07-18',
+        stayType: 'short',
+        collectDeposit: false,
+        depositAmount: undefined,
+      }),
+    );
+  });
+});
 
 describe('occupancy transfer form', () => {
   it('submits the target room resources with the transfer dates', () => {