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/all/page.tsx

@@ -9,13 +9,14 @@ import { Skeleton } from "@/shared/components/ui/skeleton"
 import { ExamDataTable } from "@/modules/exams/components/exam-data-table"
 import { ExamFilters } from "@/modules/exams/components/exam-filters"
 import { getExams } from "@/modules/exams/data-access"
-import { getAuthContext } from "@/shared/lib/auth-guard"
+import { requirePermission } from "@/shared/lib/auth-guard"
+import { Permissions } from "@/shared/types/permissions"
 import { getParam, type SearchParams } from "@/shared/lib/search-params"
 import { FileText, PlusCircle } from "lucide-react"
 
 async function ExamsResults({ searchParams }: { searchParams: Promise<SearchParams> }): Promise<JSX.Element> {
   const params = await searchParams
-  const { dataScope } = await getAuthContext()
+  const ctx = await requirePermission(Permissions.EXAM_READ)
   const t = await getTranslations("examHomework")
 
   const q = getParam(params, "q")
@@ -26,7 +27,7 @@ async function ExamsResults({ searchParams }: { searchParams: Promise<SearchPara
     q,
     status,
     difficulty,
-    scope: dataScope,
+    scope: ctx.dataScope,
   })
 
   const hasFilters = Boolean(q || (status && status !== "all") || (difficulty && difficulty !== "all"))