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/rbac/rbac.service.ts

@@ -143,6 +143,26 @@ const DEPRECATED_PERMISSION_CODES = [
 
 const DEPRECATED_PERMISSION_CODE_SET = new Set<string>(DEPRECATED_PERMISSION_CODES);
 
+function getChinaDateParts(date = new Date()): { date: string; weekDay: number } {
+  const parts = Object.fromEntries(
+    new Intl.DateTimeFormat('en-CA', {
+      timeZone: 'Asia/Shanghai',
+      year: 'numeric',
+      month: '2-digit',
+      day: '2-digit',
+      weekday: 'short',
+    })
+      .formatToParts(date)
+      .filter((part) => part.type !== 'literal')
+      .map((part) => [part.type, part.value]),
+  );
+  const weekDays: Record<string, number> = { Mon: 1, Tue: 2, Wed: 3, Thu: 4, Fri: 5, Sat: 6, Sun: 7 };
+  return {
+    date: `${parts.year}-${parts.month}-${parts.day}`,
+    weekDay: weekDays[parts.weekday],
+  };
+}
+
 export const PRESET_ROLES: Array<{
   name: string;
   code: string;
@@ -684,11 +704,8 @@ export class RbacService {
       subject: t.subject,
     }));
 
-    // Get today's day of week (1=Monday, 7=Sunday)
-    const today = new Date();
-    const weekDay = today.getDay(); // 0=Sun → convert to 1-7
-    const adjustedWeekDay = weekDay === 0 ? 7 : weekDay;
-    const todayStr = today.toISOString().slice(0, 10);
+    // Get today's China business date and day of week (1=Monday, 7=Sunday)
+    const { date: todayStr, weekDay: adjustedWeekDay } = getChinaDateParts();
 
     // Get today's schedules for assigned classes
     const todaySchedules = await this.classScheduleRepo