feat(app): add error/loading boundaries across all dashboard routes and new routes

- Add error.tsx and loading.tsx boundaries for admin, parent, student, teacher routes

- Add admin announcements edit, audit-logs overview, curriculum-map, invitation-codes, permissions, questions, roles routes

- Add admin elective detail and components, files, course-plans, users, scheduling boundaries

- Add messages group-compose route

- Add parent course-plans, elective, grades report-card, practice routes

- Add student course-plans, elective detail, error-book dialogs, grades report-card, learning study-path, leave, schedule boundaries

- Add teacher attendance report, classes boundaries, course-plans boundaries, elective, exams analytics/edit-rich/all/create/new, grades report-card, homework boundaries, leave, lesson-plans calendar

- Add auth loading, onboarding loading, api cron

src/app/(dashboard)/student/attendance/page.tsx

@@ -1,5 +1,6 @@
 import { getTranslations } from "next-intl/server"
-import { getAuthContext } from "@/shared/lib/auth-guard"
+import { requirePermission, getAuthContext } from "@/shared/lib/auth-guard"
+import { Permissions } from "@/shared/types/permissions"
 import { getStudentAttendanceSummary } from "@/modules/attendance/data-access-stats"
 import { StudentAttendanceView } from "@/modules/attendance/components/student-attendance-view"
 import { EmptyState } from "@/shared/components/ui/empty-state"
@@ -8,6 +9,7 @@ import { UserX } from "lucide-react"
 export const dynamic = "force-dynamic"
 
 export default async function StudentAttendancePage() {
+  await requirePermission(Permissions.ATTENDANCE_READ)
   const ctx = await getAuthContext()
   const t = await getTranslations("attendance")
 
@@ -21,8 +23,8 @@ export default async function StudentAttendancePage() {
           <p className="text-muted-foreground">{t("description.student")}</p>
         </div>
         <EmptyState
-          title={t("errors.notFound")}
-          description={t("errors.unexpected")}
+          title={t("list.empty")}
+          description={t("list.emptyDescription")}
           icon={UserX}
           className="border-none shadow-none"
         />