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/lesson-plans/page.tsx

@@ -5,7 +5,8 @@ import { Plus } from "lucide-react"
 import { getTranslations } from "next-intl/server"
 import { Button } from "@/shared/components/ui/button"
 import { Skeleton } from "@/shared/components/ui/skeleton"
-import { getAuthContext } from "@/shared/lib/auth-guard"
+import { requirePermission } from "@/shared/lib/auth-guard"
+import { Permissions } from "@/shared/types/permissions"
 import { getLessonPlans } from "@/modules/lesson-preparation/data-access"
 import { getSubjectOptions } from "@/modules/school/data-access"
 import { LessonPlanList } from "@/modules/lesson-preparation/components/lesson-plan-list"
@@ -15,7 +16,8 @@ export const dynamic = "force-dynamic"
 
 export default async function LessonPlansPage(): Promise<JSX.Element> {
   const t = await getTranslations("lessonPreparation")
-  const ctx = await getAuthContext()
+  // V4 P0-2 修复：页面层补齐 requirePermission 权限校验
+  const ctx = await requirePermission(Permissions.LESSON_PLAN_READ)
 
   const [items, subjects] = await Promise.all([
     getLessonPlans({}, ctx.dataScope, ctx.userId),