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/grades/page.tsx

@@ -3,11 +3,14 @@ import { requirePermission } from "@/shared/lib/auth-guard"
 import { Permissions } from "@/shared/types/permissions"
 import { getStudentGradeSummary } from "@/modules/grades/data-access"
 import { getRankingTrend, getClassAverageTrend } from "@/modules/grades/data-access-ranking"
+import { getStudentPositionInClassDistribution, getStudentGrowthArchive } from "@/modules/grades/data-access-analytics"
 import { getSubjectOptions } from "@/modules/school/data-access"
 import { StudentGradeSummary } from "@/modules/grades/components/student-grade-summary"
 import { GradeFilters } from "@/modules/grades/components/grade-filters"
 import { GradeTrendCard } from "@/modules/grades/components/grade-trend-card"
 import { RankingTrendCard } from "@/modules/grades/components/ranking-trend-card"
+import { GradeDistributionChart } from "@/modules/grades/components/grade-distribution-chart"
+import { GrowthArchiveChart } from "@/modules/grades/components/growth-archive-chart"
 import { EmptyState } from "@/shared/components/ui/empty-state"
 import { UserX } from "lucide-react"
 import { getParam, type SearchParams } from "@/shared/lib/search-params"
@@ -21,7 +24,7 @@ export default async function StudentGradesPage({
 }) {
   const ctx = await requirePermission(Permissions.GRADE_RECORD_READ)
   const t = await getTranslations("grades")
-  const [sp, summary, rankingTrend, classAverageTrend, subjectOptions] = await Promise.all([
+  const [sp, summary, rankingTrend, classAverageTrend, subjectOptions, classDistribution, growthArchive] = await Promise.all([
     searchParams,
     getStudentGradeSummary(ctx.userId, ctx.dataScope),
     // v3-P1-3：接入排名趋势图
@@ -30,6 +33,10 @@ export default async function StudentGradesPage({
     getClassAverageTrend(ctx.userId, undefined, undefined, ctx.dataScope),
     // v3-P2-1：获取科目列表用于过滤器
     getSubjectOptions(),
+    // P3-9：获取学生所在班级的分布 + 本人位置标注
+    getStudentPositionInClassDistribution(ctx.userId, ctx.dataScope),
+    // P3-4：获取学生纵向成长档案（跨学年/学期聚合）
+    getStudentGrowthArchive(ctx.userId, ctx.dataScope),
   ])
 
   if (!summary) {
@@ -82,6 +89,16 @@ export default async function StudentGradesPage({
           <RankingTrendCard trend={rankingTrend} />
         </div>
       )}
+      {/* P3-9：班级分布 + 学生位置标注（隐私保护视图） */}
+      {classDistribution && (
+        <GradeDistributionChart
+          data={classDistribution.distribution}
+          highlightBucketIndex={classDistribution.studentBucketIndex}
+          studentScore={classDistribution.studentNormalizedScore}
+        />
+      )}
+      {/* P3-4：学生纵向成长档案（跨学年/学期聚合） */}
+      <GrowthArchiveChart data={growthArchive} />
       <StudentGradeSummary summary={filteredSummary} />
     </div>
   )