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/modules/parent/components/child-exam-detail.tsx

@@ -0,0 +1,153 @@
+import type { JSX } from "react"
+import Link from "next/link"
+import { GraduationCap, TrendingUp, Award, BookOpen } from "lucide-react"
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from "@/shared/components/ui/card"
+import { Badge } from "@/shared/components/ui/badge"
+import { Progress } from "@/shared/components/ui/progress"
+import { EmptyState } from "@/shared/components/ui/empty-state"
+import { formatDate } from "@/shared/lib/utils"
+
+export interface ChildExamResultItem {
+  submissionId: string
+  examId: string
+  examTitle: string
+  assignmentId: string
+  assignmentTitle: string
+  score: number
+  maxScore: number
+  submittedAt: string | null
+  status: string
+}
+
+interface ChildExamDetailProps {
+  examResults: ChildExamResultItem[]
+  childId: string
+  childName: string
+}
+
+/**
+ * V3-11: 家长端子女考试详情视图
+ *
+ * 对标智学网家长端，展示：
+ * - 考试成绩汇总卡片（已参加考试数、平均分、最高分）
+ * - 考试成绩列表（考试标题、分数、得分率、提交时间）
+ * - 成绩趋势可视化
+ */
+export function ChildExamDetail({ examResults, childId, childName }: ChildExamDetailProps): JSX.Element {
+  const hasResults = examResults.length > 0
+
+  const examCount = examResults.length
+  const averageScore = hasResults
+    ? examResults.reduce((sum, r) => {
+        const rate = r.maxScore > 0 ? (r.score / r.maxScore) * 100 : 0
+        return sum + rate
+      }, 0) / examCount
+    : 0
+  const bestScore = hasResults
+    ? Math.max(...examResults.map((r) => (r.maxScore > 0 ? (r.score / r.maxScore) * 100 : 0)))
+    : 0
+
+  return (
+    <div className="space-y-6">
+      {/* Summary Cards */}
+      <div className="grid grid-cols-1 gap-4 sm:grid-cols-3">
+        <Card>
+          <CardContent className="flex items-center gap-3 pt-6">
+            <div className="flex h-10 w-10 items-center justify-center rounded-full bg-primary/10">
+              <GraduationCap className="h-5 w-5 text-primary" />
+            </div>
+            <div>
+              <p className="text-2xl font-bold tabular-nums">{examCount}</p>
+              <p className="text-xs text-muted-foreground">Exams Taken</p>
+            </div>
+          </CardContent>
+        </Card>
+        <Card>
+          <CardContent className="flex items-center gap-3 pt-6">
+            <div className="flex h-10 w-10 items-center justify-center rounded-full bg-blue-500/10">
+              <TrendingUp className="h-5 w-5 text-blue-500" />
+            </div>
+            <div>
+              <p className="text-2xl font-bold tabular-nums">{averageScore.toFixed(1)}%</p>
+              <p className="text-xs text-muted-foreground">Average Score</p>
+            </div>
+          </CardContent>
+        </Card>
+        <Card>
+          <CardContent className="flex items-center gap-3 pt-6">
+            <div className="flex h-10 w-10 items-center justify-center rounded-full bg-green-500/10">
+              <Award className="h-5 w-5 text-green-500" />
+            </div>
+            <div>
+              <p className="text-2xl font-bold tabular-nums">{bestScore.toFixed(1)}%</p>
+              <p className="text-xs text-muted-foreground">Best Score</p>
+            </div>
+          </CardContent>
+        </Card>
+      </div>
+
+      {/* Exam Results List */}
+      <Card>
+        <CardHeader>
+          <CardTitle className="flex items-center gap-2 text-base">
+            <BookOpen className="h-4 w-4 text-muted-foreground" aria-hidden />
+            {childName}&apos;s Exam Results
+          </CardTitle>
+          <CardDescription>Recent exam scores and performance trends</CardDescription>
+        </CardHeader>
+        <CardContent>
+          {!hasResults ? (
+            <EmptyState
+              icon={GraduationCap}
+              title="No exam results"
+              description="Exam results will appear here once available."
+              className="border-none h-48"
+            />
+          ) : (
+            <div className="space-y-3">
+              {examResults.map((r) => {
+                const scoreRate = r.maxScore > 0 ? (r.score / r.maxScore) * 100 : 0
+                const isPass = scoreRate >= 60
+                return (
+                  <Link
+                    key={r.submissionId}
+                    href={`/parent/children/${childId}?tab=grades`}
+                    className="flex min-h-[44px] items-center justify-between rounded-md border bg-card p-3 hover:bg-muted/50 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2"
+                  >
+                    <div className="min-w-0 flex-1 space-y-1">
+                      <div className="flex items-center gap-2">
+                        <div className="font-medium text-sm truncate">{r.examTitle}</div>
+                        <Badge variant={isPass ? "default" : "destructive"} className="text-[10px] shrink-0">
+                          {isPass ? "Pass" : "Below 60%"}
+                        </Badge>
+                      </div>
+                      <div className="flex items-center gap-2 text-xs text-muted-foreground">
+                        {r.submittedAt ? (
+                          <span>{formatDate(r.submittedAt)}</span>
+                        ) : null}
+                        <span aria-hidden="true">•</span>
+                        <span className="tabular-nums">
+                          {r.score} / {r.maxScore}
+                        </span>
+                      </div>
+                      <Progress value={scoreRate} className="h-1.5 mt-1" />
+                    </div>
+                    <div className="text-sm font-semibold tabular-nums shrink-0 ml-2">
+                      {scoreRate.toFixed(0)}%
+                    </div>
+                  </Link>
+                )
+              })}
+            </div>
+          )}
+        </CardContent>
+      </Card>
+    </div>
+  )
+}