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)/layout.tsx

@@ -5,36 +5,17 @@ import {
   AiClientProvider,
 } from "@/modules/ai/context/ai-client-provider"
 import { AiAssistantWidget } from "@/modules/ai/components/ai-assistant-widget"
-import {
-  aiChatAction,
-  suggestSimilarQuestionsAction,
-  suggestGradingAction,
-  generateLessonContentAction,
-  generateQuestionVariantAction,
-  analyzeWeaknessAction,
-  generateChildSummaryAction,
-  recommendStudyPathAction,
-  getAiUsageStatsAction,
-} from "@/modules/ai/actions"
-import type { AiClientService } from "@/modules/ai/types"
-
-const aiClientService: AiClientService = {
-  chat: aiChatAction,
-  suggestSimilarQuestions: suggestSimilarQuestionsAction,
-  suggestGrading: suggestGradingAction,
-  generateLessonContent: generateLessonContentAction,
-  generateQuestionVariant: generateQuestionVariantAction,
-  analyzeWeakness: analyzeWeaknessAction,
-  generateChildSummary: generateChildSummaryAction,
-  recommendStudyPath: recommendStudyPathAction,
-  getAiUsageStats: getAiUsageStatsAction,
-}
+import { createFullAiClientService } from "@/modules/ai/context/create-ai-client-service"
 
 export default function DashboardLayout({
   children,
 }: {
   children: React.ReactNode
 }): React.ReactNode {
+  // 在 Server Component 函数体内创建 service，避免模块级单例在未来扩展请求级状态时泄露上下文。
+  // service 对象本身仅是 Server Action 引用集合，无共享可变状态，Action 内部通过 requirePermission() 动态解析当前用户。
+  const aiClientService = createFullAiClientService()
+
   return (
     <AiClientProvider service={aiClientService}>
       <SidebarProvider sidebar={<AppSidebar />}>