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/homework/submissions/[submissionId]/page.tsx

@@ -7,46 +7,22 @@ import { HomeworkGradingView } from "@/modules/homework/components/homework-grad
 import { Button } from "@/shared/components/ui/button"
 import { ScanLine } from "lucide-react"
 import { formatDate } from "@/shared/lib/utils"
-import {
-  AiClientProvider,
-  type AiClientService,
-} from "@/modules/ai/context/ai-client-provider"
-import {
-  suggestGradingAction,
-  aiChatAction,
-  suggestSimilarQuestionsAction,
-  generateLessonContentAction,
-  generateQuestionVariantAction,
-  analyzeWeaknessAction,
-} from "@/modules/ai/actions"
+import { AiClientProvider } from "@/modules/ai/context/ai-client-provider"
+import { createCoreAiClientService } from "@/modules/ai/context/create-ai-client-service"
+import { requirePermission } from "@/shared/lib/auth-guard"
+import { Permissions } from "@/shared/types/permissions"
 
 export const dynamic = "force-dynamic"
 
-/**
- * 构建 AI 客户端服务（Server Action 引用集合）
- *
- * 通过 React Context 注入，客户端组件不直接 import actions，
- * 遵循依赖注入模式，便于测试时替换为 mock。
- */
-function createAiClientService(): AiClientService {
-  return {
-    chat: aiChatAction,
-    suggestSimilarQuestions: suggestSimilarQuestionsAction,
-    suggestGrading: suggestGradingAction,
-    generateLessonContent: generateLessonContentAction,
-    generateQuestionVariant: generateQuestionVariantAction,
-    analyzeWeakness: analyzeWeaknessAction,
-  }
-}
-
 export default async function HomeworkSubmissionGradingPage({ params }: { params: Promise<{ submissionId: string }> }): Promise<JSX.Element> {
   const { submissionId } = await params
+  await requirePermission(Permissions.HOMEWORK_GRADE)
   const t = await getTranslations("examHomework")
   const submission = await getHomeworkSubmissionDetails(submissionId)
 
   if (!submission) return notFound()
 
-  const aiClientService = createAiClientService()
+  const aiClientService = createCoreAiClientService()
 
   return (
     <div className="flex h-full flex-col space-y-4 p-6">
@@ -55,12 +31,12 @@ export default async function HomeworkSubmissionGradingPage({ params }: { params
           <h1 className="text-2xl font-bold tracking-tight line-clamp-2">{submission.assignmentTitle}</h1>
           <div className="flex items-center gap-4 text-sm text-muted-foreground mt-1">
             <span>
-              Student: <span className="font-medium text-foreground">{submission.studentName}</span>
+              {t("homework.grade.student")}: <span className="font-medium text-foreground">{submission.studentName}</span>
             </span>
             <span aria-hidden="true">•</span>
-            <span className="tabular-nums">Submitted: {submission.submittedAt ? formatDate(submission.submittedAt) : "-"}</span>
+            <span className="tabular-nums">{t("homework.grade.submitted")}: {submission.submittedAt ? formatDate(submission.submittedAt) : "-"}</span>
             <span aria-hidden="true">•</span>
-            <span className="capitalize">Status: {submission.status}</span>
+            <span className="capitalize">{t("homework.grade.status")}: {submission.status}</span>
           </div>
         </div>
         <Button asChild variant="outline" size="sm">