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/admin/src/pages/IntegrationConfig/integration-config-form.integration.test.ts

@@ -1,8 +1,5 @@
 import { describe, expect, it } from 'vitest';
-import {
-  buildDingTalkConfigPayload,
-  isAppSecretRequired,
-} from './integration-config-form';
+import { buildDingTalkConfigPayload, isAppSecretRequired } from './integration-config-form';
 
 describe('DingTalk integration config form', () => {
   it('requires AppSecret only for the first configuration', () => {