feat(exams,homework,parent): V3 审计深度修复 — 批量批改/考试分析/提交反馈/家长视图/移动端优化

V3-5: exam-actions.tsx 集成 useExamHomeworkFeatures hook，按角色控制菜单项可见性
V3-7: 批量批改 — 新增 batchAutoGradeSubmissions data-access + Server Action + HomeworkBatchGradingView 组件
V3-8: 考试分析仪表盘 — 新增 getExamAnalytics stats-service + ExamAnalyticsDashboard 组件 + /teacher/exams/[id]/analytics 路由
V3-9: 提交后即时反馈页 — 新增 HomeworkSubmissionResult 组件 + /student/learning/assignments/[id]/result 路由
V3-11: 家长考试详情 — 新增 ChildExamDetail 组件 + getStudentExamResults data-access + child-detail-panel exams Tab
V3-12: 移动端触控优化 — 题目导航与考试操作按钮 44px 最小触控目标

修复: instrumentation.ts 适配器补全 questionCount/averageScore/overdueCount 字段
修复: exam-homework-port.ts 类型导入对齐 ExamWithQuestionsForHomework
修复: trend-line-chart.tsx 数据类型允许 undefined（classAverage 可选场景）

同步更新 004/005 架构文档

src/app/(dashboard)/teacher/exams/[id]/analytics/page.tsx

@@ -0,0 +1,57 @@
+import type { JSX } from "react"
+import { notFound } from "next/navigation"
+import { getTranslations } from "next-intl/server"
+import Link from "next/link"
+import { Button } from "@/shared/components/ui/button"
+import { EmptyState } from "@/shared/components/ui/empty-state"
+import { BarChart3, ArrowLeft } from "lucide-react"
+import { getExamById } from "@/modules/exams/data-access"
+import { getExamAnalytics } from "@/modules/exams/stats-service"
+import { ExamAnalyticsDashboard } from "@/modules/exams/components/exam-analytics-dashboard"
+
+export const dynamic = "force-dynamic"
+
+export default async function ExamAnalyticsPage({ params }: { params: Promise<{ id: string }> }): Promise<JSX.Element> {
+  const { id } = await params
+  const t = await getTranslations("examHomework")
+
+  const [exam, analytics] = await Promise.all([
+    getExamById(id),
+    getExamAnalytics(id),
+  ])
+
+  if (!exam) return notFound()
+
+  return (
+    <div className="flex h-full flex-col space-y-6 p-8">
+      <div className="flex flex-col justify-between gap-4 md:flex-row md:items-center">
+        <div className="min-w-0">
+          <div className="flex items-center gap-2">
+            <BarChart3 className="h-6 w-6 text-muted-foreground" />
+            <h1 className="text-2xl font-bold tracking-tight">{t("exam.analytics.title")}</h1>
+          </div>
+          <p className="text-muted-foreground truncate">{exam.title}</p>
+          <p className="mt-1 text-sm text-muted-foreground">{t("exam.analytics.description")}</p>
+        </div>
+        <div className="flex items-center gap-2">
+          <Button asChild variant="outline">
+            <Link href="/teacher/exams/all">
+              <ArrowLeft className="mr-2 h-4 w-4" />
+              {t("homework.grade.back")}
+            </Link>
+          </Button>
+        </div>
+      </div>
+
+      {analytics && analytics.gradedCount > 0 ? (
+        <ExamAnalyticsDashboard analytics={analytics} />
+      ) : (
+        <EmptyState
+          title={t("exam.analytics.title")}
+          description={t("exam.analytics.noData")}
+          icon={BarChart3}
+        />
+      )}
+    </div>
+  )
+}