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)/student/learning/assignments/[assignmentId]/result/page.tsx

@@ -0,0 +1,35 @@
+import type { JSX } from "react"
+import { notFound } from "next/navigation"
+import { getTranslations } from "next-intl/server"
+import { getHomeworkAssignmentById, getStudentSubmissionResult } from "@/modules/homework/data-access"
+import { HomeworkSubmissionResult } from "@/modules/homework/components/homework-submission-result"
+import { getSession } from "@/shared/lib/session"
+
+export const dynamic = "force-dynamic"
+
+export default async function HomeworkResultPage({ params }: { params: Promise<{ assignmentId: string }> }): Promise<JSX.Element> {
+  const { assignmentId } = await params
+  const t = await getTranslations("examHomework")
+  const session = await getSession()
+  const studentId = session?.user?.id
+
+  if (!studentId) return notFound()
+
+  const [assignment, submission] = await Promise.all([
+    getHomeworkAssignmentById(assignmentId),
+    getStudentSubmissionResult(assignmentId, studentId),
+  ])
+
+  if (!assignment) return notFound()
+  if (!submission) return notFound()
+
+  return (
+    <div className="flex h-full flex-col space-y-6 p-8">
+      <div>
+        <h1 className="text-2xl font-bold tracking-tight">{t("homework.result.title")}</h1>
+        <p className="text-muted-foreground">{assignment.title}</p>
+      </div>
+      <HomeworkSubmissionResult submission={submission} />
+    </div>
+  )
+}