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/error-book/page.tsx

@@ -1,11 +1,13 @@
 import type { JSX } from "react"
 import { Suspense } from "react"
 import { BarChart3 } from "lucide-react"
+import { getTranslations } from "next-intl/server"
 
 import { requirePermission } from "@/shared/lib/auth-guard"
 import { Permissions } from "@/shared/types/permissions"
 import { EmptyState } from "@/shared/components/ui/empty-state"
 import { Skeleton } from "@/shared/components/ui/skeleton"
+import { WidgetBoundary } from "@/shared/components/widget-boundary"
 import { getParam, type SearchParams } from "@/shared/lib/search-params"
 import { getStudentIdsByClassIds, getClassIdsByGradeIds } from "@/modules/classes/data-access"
 
@@ -17,7 +19,7 @@ import {
   getSubjectErrorOverviews,
   getClassErrorOverviews,
   getChapterWeakness,
-} from "@/modules/error-book/data-access"
+} from "@/modules/error-book/data-access-analytics"
 import { TopWrongQuestions } from "@/modules/error-book/components/top-wrong-questions"
 import { SubjectTabs } from "@/modules/error-book/components/subject-tabs"
 import { ClassFilter } from "@/modules/error-book/components/class-filter"
@@ -34,6 +36,7 @@ async function TeacherErrorBookContent({
 }: {
   searchParams: Promise<SearchParams>
 }): Promise<JSX.Element> {
+  const t = await getTranslations("errorBook")
   const ctx = await requirePermission(Permissions.ERROR_BOOK_ANALYTICS_READ)
 
   const params = await searchParams
@@ -45,13 +48,13 @@ async function TeacherErrorBookContent({
     return (
       <div className="flex h-full flex-col space-y-8 p-8">
         <div>
-          <h1 className="text-2xl font-bold tracking-tight">错题分析</h1>
-          <p className="text-muted-foreground">按学科、班级查看学生的错题统计与薄弱知识点。</p>
+          <h1 className="text-2xl font-bold tracking-tight">{t("teacher.title")}</h1>
+          <p className="text-muted-foreground">{t("teacher.descriptionShort")}</p>
         </div>
         <EmptyState
           icon={BarChart3}
-          title="暂无可查看的班级"
-          description="您还未被分配到任何班级，无法查看错题分析数据。"
+          title={t("teacher.noClass")}
+          description={t("teacher.noClassDesc")}
           className="h-[360px] bg-card"
         />
       </div>
@@ -72,13 +75,13 @@ async function TeacherErrorBookContent({
     return (
       <div className="flex h-full flex-col space-y-8 p-8">
         <div>
-          <h1 className="text-2xl font-bold tracking-tight">错题分析</h1>
-          <p className="text-muted-foreground">按学科、班级查看学生的错题统计与薄弱知识点。</p>
+          <h1 className="text-2xl font-bold tracking-tight">{t("teacher.title")}</h1>
+          <p className="text-muted-foreground">{t("teacher.descriptionShort")}</p>
         </div>
         <EmptyState
           icon={BarChart3}
-          title="班级暂无学生"
-          description="班级中没有学生，无法查看错题分析数据。"
+          title={t("teacher.noStudent")}
+          description={t("teacher.noStudentDesc")}
           className="h-[360px] bg-card"
         />
       </div>
@@ -128,9 +131,9 @@ async function TeacherErrorBookContent({
   return (
     <div className="flex h-full flex-col space-y-6 p-8">
       <div>
-        <h1 className="text-2xl font-bold tracking-tight">错题分析</h1>
+        <h1 className="text-2xl font-bold tracking-tight">{t("teacher.title")}</h1>
         <p className="text-muted-foreground">
-          按学科、班级查看学生的错题统计与薄弱知识点，辅助精准教学。
+          {t("teacher.description")}
         </p>
       </div>
 
@@ -155,71 +158,86 @@ async function TeacherErrorBookContent({
       ) : null}
 
       {/* 统计卡片 */}
-      <AnalyticsStatsCards
-        totalStudents={queryStudentIds.length}
-        studentsWithErrorBook={studentsWithErrorBook.length}
-        totalErrorItems={totalErrorItems}
-        averageMasteryRate={averageMasteryRate}
-        dueReviewCount={totalDueReview}
-        knowledgePointCount={knowledgePointCount}
-      />
+      <WidgetBoundary title={t("teacher.title")} skeletonHeight={120}>
+        <AnalyticsStatsCards
+          totalStudents={queryStudentIds.length}
+          studentsWithErrorBook={studentsWithErrorBook.length}
+          totalErrorItems={totalErrorItems}
+          averageMasteryRate={averageMasteryRate}
+          dueReviewCount={totalDueReview}
+          knowledgePointCount={knowledgePointCount}
+        />
+      </WidgetBoundary>
 
       {/* 班级错题对比图（仅在"全部班级"视图下显示） */}
       {effectiveClassId === "all" && classOverviews.length > 1 ? (
-        <ClassErrorBarChart data={classOverviews} />
+        <WidgetBoundary title={t("teacher.subjectDist")} skeletonHeight={300}>
+          <ClassErrorBarChart data={classOverviews} />
+        </WidgetBoundary>
       ) : null}
 
       {/* 章节错题分布 + 知识点薄弱度（并排） */}
       <div className="grid gap-4 lg:grid-cols-2">
-        {chapterWeakness.length > 0 ? (
-          <ChapterWeaknessChart data={chapterWeakness} />
-        ) : (
-          <EmptyState
-            icon={BarChart3}
-            title="暂无章节错题数据"
-            description="尚未关联知识点到章节，无法显示章节维度统计。"
-            className="h-[300px] bg-card"
-          />
-        )}
-        {weakKps.length > 0 ? (
-          <KnowledgePointWeaknessChart data={weakKps} />
-        ) : (
-          <EmptyState
-            icon={BarChart3}
-            title="暂无知识点数据"
-            description="错题尚未关联知识点，无法显示薄弱知识点统计。"
-            className="h-[300px] bg-card"
-          />
-        )}
+        <WidgetBoundary title={t("teacher.weakPoints")} skeletonHeight={300}>
+          {chapterWeakness.length > 0 ? (
+            <ChapterWeaknessChart data={chapterWeakness} />
+          ) : (
+            <EmptyState
+              icon={BarChart3}
+              title={t("teacher.noChapterDataTitle")}
+              description={t("teacher.noChapterDataDesc")}
+              className="h-[300px] bg-card"
+            />
+          )}
+        </WidgetBoundary>
+        <WidgetBoundary title={t("teacher.weakPoints")} skeletonHeight={300}>
+          {weakKps.length > 0 ? (
+            <KnowledgePointWeaknessChart data={weakKps} />
+          ) : (
+            <EmptyState
+              icon={BarChart3}
+              title={t("teacher.noKpDataTitle")}
+              description={t("teacher.noKpDataDesc")}
+              className="h-[300px] bg-card"
+            />
+          )}
+        </WidgetBoundary>
       </div>
 
       {/* 学生错题详情（按班级分组） */}
       <div className="space-y-3">
         <div className="flex items-center justify-between">
-          <h2 className="text-lg font-semibold">学生错题详情</h2>
+          <h2 className="text-lg font-semibold">{t("teacher.studentDetail")}</h2>
           <span className="text-sm text-muted-foreground">
-            共 {queryStudentIds.length} 名学生，{studentsWithErrorBook.length} 名有错题
+            {t("teacher.studentsCount", {
+              total: queryStudentIds.length,
+              withErrors: studentsWithErrorBook.length,
+            })}
           </span>
         </div>
-        {sortedSummaries.length > 0 ? (
-          <GroupedStudentErrorTable
-            students={sortedSummaries}
-            studentNames={nameMap}
-            basePath="/teacher/error-book"
-          />
-        ) : (
-          <EmptyState
-            icon={BarChart3}
-            title="暂无学生错题"
-            description="所选范围内没有学生错题数据。"
-            className="h-[200px] bg-card"
-          />
-        )}
+        <WidgetBoundary title={t("teacher.studentDetail")} skeletonHeight={300}>
+          {sortedSummaries.length > 0 ? (
+            <GroupedStudentErrorTable
+              students={sortedSummaries}
+              studentNames={nameMap}
+              basePath="/teacher/error-book"
+            />
+          ) : (
+            <EmptyState
+              icon={BarChart3}
+              title={t("teacher.noStudentErrorsTitle")}
+              description={t("teacher.noStudentErrorsDesc")}
+              className="h-[200px] bg-card"
+            />
+          )}
+        </WidgetBoundary>
       </div>
 
       {/* 高频错题 Top 10 */}
       {topWrongQuestions.length > 0 ? (
-        <TopWrongQuestions questions={topWrongQuestions} />
+        <WidgetBoundary title={t("teacher.topWrong")} skeletonHeight={300}>
+          <TopWrongQuestions questions={topWrongQuestions} />
+        </WidgetBoundary>
       ) : null}
     </div>
   )