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/data-access.ts

@@ -13,6 +13,7 @@ import {
 import {
   getStudentDashboardGrades,
   getStudentHomeworkAssignments,
+  getStudentExamResults,
 } from "@/modules/homework/data-access"
 import { getStudentGradeSummary } from "@/modules/grades/data-access"
 import { getGradeNameById } from "@/modules/school/data-access"
@@ -22,6 +23,7 @@ import type {
   ChildDashboardData,
   ChildHomeworkSummaryData,
   ChildScheduleItem,
+  ChildWeeklyScheduleItem,
   ParentChildRelation,
   ParentDashboardData,
 } from "./types"
@@ -174,26 +176,50 @@ const buildTodaySchedule = (
     .sort((a, b) => a.startTime.localeCompare(b.startTime))
 }
 
+const buildWeeklySchedule = (
+  schedule: Awaited<ReturnType<typeof getStudentSchedule>>,
+): ChildWeeklyScheduleItem[] => {
+  return schedule
+    .map((s) => ({
+      id: s.id,
+      classId: s.classId,
+      className: s.className,
+      course: s.course,
+      startTime: s.startTime,
+      endTime: s.endTime,
+      location: s.location ?? null,
+      weekday: s.weekday,
+    }))
+    .sort((a, b) =>
+      a.weekday === b.weekday
+        ? a.startTime.localeCompare(b.startTime)
+        : a.weekday - b.weekday,
+    )
+}
+
 export const getChildDashboardData = cache(
   async (studentId: string, relation: string | null = null): Promise<ChildDashboardData | null> => {
     const basicInfo = await getChildBasicInfo(studentId, relation)
     if (!basicInfo) return null
 
-    const [enrolledClasses, schedule, assignments, gradeTrend, gradeSummary] = await Promise.all([
+    const [enrolledClasses, schedule, assignments, gradeTrend, gradeSummary, examResults] = await Promise.all([
       getStudentClasses(studentId),
       getStudentSchedule(studentId),
       getStudentHomeworkAssignments(studentId),
       getStudentDashboardGrades(studentId),
       getStudentGradeSummary(studentId),
+      getStudentExamResults(studentId),
     ])
 
     return {
       basicInfo,
       enrolledClasses,
       todaySchedule: buildTodaySchedule(schedule),
+      weeklySchedule: buildWeeklySchedule(schedule),
       homeworkSummary: buildHomeworkSummary(assignments),
       gradeTrend,
       gradeSummary,
+      examResults,
     }
   },
 )
@@ -224,3 +250,20 @@ export const getParentDashboardData = cache(
     }
   },
 )
+
+/**
+ * 获取家长所有子女的轻量列表（id + name），用于详情页头部多子女切换器。
+ * 一次批量查询，避免 N+1。
+ */
+export const getChildNameList = cache(
+  async (parentId: string): Promise<Array<{ id: string; name: string | null }>> => {
+    const relations = await getChildren(parentId)
+    if (relations.length === 0) return []
+
+    const nameMap = await getUserNamesByIds(relations.map((r) => r.studentId))
+    return relations.map((r) => ({
+      id: r.studentId,
+      name: nameMap.get(r.studentId)?.name ?? null,
+    }))
+  },
+)