feat: refine admin forms, attendance and finance workflows

Squash merge PR #23.

Included changes:
- complete occupancy check-in required fields/default payload
- improve responsive admin management pages
- fix attendance edge cases and attendance period config
- refine wallet/finance-related workflow handling

Checks:
- npm run typecheck -w apps/admin
- npm run typecheck -w apps/server

apps/server/src/entities/index.ts

@@ -23,6 +23,7 @@ export { ClassSchedule, ScheduleType } from './class-schedule.entity';
 export { AttendanceRecord } from './attendance-record.entity';
 export { AttendanceSession } from './attendance-session.entity';
 export { AttendanceDevice, AttendanceDeviceStatus } from './attendance-device.entity';
+export { AttendancePeriodConfig } from './attendance-period-config.entity';
 export { DingAttendanceRaw } from './ding-attendance-raw.entity';
 export { SyncLog } from './sync-log.entity';
 export { SyncState } from './sync-state.entity';