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/app.module.ts

@@ -31,6 +31,7 @@ import {
   AttendanceRecord,
   AttendanceSession,
   AttendanceDevice,
+  AttendancePeriodConfig,
   DingAttendanceRaw,
   SyncLog,
   SyncState,
@@ -128,6 +129,7 @@ import { IntegrationConfigModule } from './integration/config/config.module';
           AttendanceRecord,
           AttendanceSession,
           AttendanceDevice,
+          AttendancePeriodConfig,
           DingAttendanceRaw,
           Notification,
           StudentProfile,