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)/teacher/exams/[id]/proctoring/page.tsx

@@ -1,5 +1,6 @@
 import type { JSX } from "react"
 import { notFound } from "next/navigation"
+import { getTranslations } from "next-intl/server"
 import { requirePermission, PermissionDeniedError } from "@/shared/lib/auth-guard"
 import { Permissions } from "@/shared/types/permissions"
 import { ProctoringDashboard } from "@/modules/proctoring/components/proctoring-dashboard"
@@ -18,13 +19,14 @@ export default async function ExamProctoringPage({
 }: {
   params: Promise<{ id: string }>
 }): Promise<JSX.Element> {
+  const t = await getTranslations("examHomework.proctoring.page")
   try {
     await requirePermission(Permissions.EXAM_PROCTOR)
   } catch (error) {
     if (error instanceof PermissionDeniedError) {
       return (
         <div className="p-10 text-center text-muted-foreground">
-          您没有监考权限（exam:proctor）。
+          {t("noPermission")}
         </div>
       )
     }
@@ -51,8 +53,8 @@ export default async function ExamProctoringPage({
   return (
     <div className="flex h-full flex-col space-y-4 p-4">
       <div>
-        <h1 className="text-2xl font-bold tracking-tight">Exam Proctoring</h1>
-        <p className="text-muted-foreground">Monitor student activity during the exam.</p>
+        <h1 className="text-2xl font-bold tracking-tight">{t("title")}</h1>
+        <p className="text-muted-foreground">{t("description")}</p>
       </div>
       <ProctoringDashboard examId={id} initialData={initialData} />
     </div>