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/learning/textbooks/[id]/error.tsx

@@ -1,29 +1,13 @@
 "use client"
 
-import { AlertCircle } from "lucide-react"
-import { useTranslations } from "next-intl"
-
-import { EmptyState } from "@/shared/components/ui/empty-state"
+import { RouteError } from "@/shared/components/route-error"
 
 export default function StudentTextbookDetailError({
+  error,
   reset,
 }: {
   error: Error & { digest?: string }
   reset: () => void
 }) {
-  const t = useTranslations("textbooks")
-  return (
-    <div className="flex h-full flex-col items-center justify-center space-y-4 p-8">
-      <EmptyState
-        icon={AlertCircle}
-        title={t("error.loadFailed")}
-        description={t("error.loadFailedDesc")}
-        action={{
-          label: t("error.retry"),
-          onClick: () => reset(),
-        }}
-        className="border-none shadow-none h-auto"
-      />
-    </div>
-  )
+  return <RouteError error={error} reset={reset} namespace="textbooks" />
 }

src/app/(dashboard)/student/learning/textbooks/[id]/loading.tsx

@@ -2,7 +2,12 @@ import { Skeleton } from "@/shared/components/ui/skeleton"
 
 export default function Loading() {
   return (
-    <div className="flex h-[calc(100vh-4rem-3rem)] flex-col overflow-hidden">
+    <div
+      role="status"
+      aria-busy="true"
+      aria-label="加载中"
+      className="flex h-[calc(100vh-4rem-3rem)] flex-col overflow-hidden"
+    >
       <div className="flex items-center justify-between border-b py-3 px-6 shrink-0">
         <div className="flex items-center gap-3">
           <Skeleton className="h-6 w-48" />

src/app/(dashboard)/student/learning/textbooks/[id]/page.tsx

@@ -1,3 +1,4 @@
+import type { JSX } from "react"
 import { notFound } from "next/navigation"
 import { getTranslations } from "next-intl/server"
 
@@ -10,6 +11,8 @@ import { Badge } from "@/shared/components/ui/badge"
 import { EmptyState } from "@/shared/components/ui/empty-state"
 import { getCurrentStudentUser } from "@/modules/users/data-access"
 import { getGradeNameById } from "@/modules/school/data-access"
+import { requirePermission } from "@/shared/lib/auth-guard"
+import { Permissions } from "@/shared/types/permissions"
 
 export const dynamic = "force-dynamic"
 
@@ -17,8 +20,10 @@ export default async function StudentTextbookDetailPage({
   params,
 }: {
   params: Promise<{ id: string }>
-}) {
+}): Promise<JSX.Element> {
   const t = await getTranslations("textbooks")
+  // P0 显式权限校验：与教师端一致，校验 TEXTBOOK_READ 权限点
+  await requirePermission(Permissions.TEXTBOOK_READ)
   const student = await getCurrentStudentUser()
   if (!student) return notFound()
 

src/app/(dashboard)/student/learning/textbooks/error.tsx

@@ -1,29 +1,13 @@
 "use client"
 
-import { AlertCircle } from "lucide-react"
-import { useTranslations } from "next-intl"
-
-import { EmptyState } from "@/shared/components/ui/empty-state"
+import { RouteError } from "@/shared/components/route-error"
 
 export default function StudentTextbooksError({
+  error,
   reset,
 }: {
   error: Error & { digest?: string }
   reset: () => void
 }) {
-  const t = useTranslations("textbooks")
-  return (
-    <div className="flex h-full flex-col items-center justify-center space-y-4 p-8">
-      <EmptyState
-        icon={AlertCircle}
-        title={t("error.loadFailed")}
-        description={t("error.loadFailedDesc")}
-        action={{
-          label: t("error.retry"),
-          onClick: () => reset(),
-        }}
-        className="border-none shadow-none h-auto"
-      />
-    </div>
-  )
+  return <RouteError error={error} reset={reset} namespace="textbooks" />
 }

src/app/(dashboard)/student/learning/textbooks/loading.tsx

@@ -1,8 +1,14 @@
 import { Skeleton } from "@/shared/components/ui/skeleton"
+import { Card, CardContent, CardFooter, CardHeader } from "@/shared/components/ui/card"
 
 export default function Loading() {
   return (
-    <div className="space-y-8">
+    <div
+      role="status"
+      aria-busy="true"
+      aria-label="加载中"
+      className="space-y-8"
+    >
       <div className="space-y-2">
         <Skeleton className="h-8 w-40" />
         <Skeleton className="h-4 w-56" />
@@ -10,7 +16,22 @@ export default function Loading() {
       <Skeleton className="h-10 w-full max-w-md" />
       <div className="grid grid-cols-1 gap-6 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4">
         {Array.from({ length: 8 }).map((_, i) => (
-          <Skeleton key={i} className="h-48 w-full" />
+          <Card key={i} className="h-full overflow-hidden">
+            <div className="aspect-[4/3] w-full bg-muted/30 p-6 flex items-center justify-center">
+              <Skeleton className="h-24 w-20 rounded-sm" />
+            </div>
+            <CardHeader className="p-4 pb-2 space-y-2">
+              <Skeleton className="h-5 w-16" />
+              <Skeleton className="h-6 w-full" />
+            </CardHeader>
+            <CardContent className="p-4 pt-0 space-y-2">
+              <Skeleton className="h-4 w-24" />
+              <Skeleton className="h-4 w-32" />
+            </CardContent>
+            <CardFooter className="p-4 pt-0 mt-auto">
+              <Skeleton className="h-6 w-full rounded-md" />
+            </CardFooter>
+          </Card>
         ))}
       </div>
     </div>

src/app/(dashboard)/student/learning/textbooks/page.tsx

@@ -1,3 +1,4 @@
+import type { JSX } from "react"
 import { BookOpen, UserX } from "lucide-react"
 import { getTranslations } from "next-intl/server"
 
@@ -8,6 +9,8 @@ import { getCurrentStudentUser } from "@/modules/users/data-access"
 import { getGradeNameById } from "@/modules/school/data-access"
 import { EmptyState } from "@/shared/components/ui/empty-state"
 import { getParam, type SearchParams } from "@/shared/lib/search-params"
+import { requirePermission } from "@/shared/lib/auth-guard"
+import { Permissions } from "@/shared/types/permissions"
 
 export const dynamic = "force-dynamic"
 
@@ -15,8 +18,10 @@ export default async function StudentTextbooksPage({
   searchParams,
 }: {
   searchParams: Promise<SearchParams>
-}) {
+}): Promise<JSX.Element> {
   const t = await getTranslations("textbooks")
+  // P0 显式权限校验：与教师端一致，校验 TEXTBOOK_READ 权限点
+  await requirePermission(Permissions.TEXTBOOK_READ)
   const [student, sp] = await Promise.all([getCurrentStudentUser(), searchParams])
 
   if (!student) {