feat(error-book): implement error book module with SM2 spaced repetition

- Add SM2 algorithm implementation with tests for spaced repetition review scheduling

- Add data-access, schema, types, and server actions for error book CRUD

- Add components: add dialog, class overview, filters, item card, stats cards, review buttons, top wrong questions

- Add error-book routes for admin, teacher, parent, and student roles

- Add i18n messages (en, zh-CN) for error book module

src/app/(dashboard)/admin/error-book/error.tsx

@@ -0,0 +1,19 @@
+"use client"
+
+import { BarChart3 } from "lucide-react"
+
+import { EmptyState } from "@/shared/components/ui/empty-state"
+
+export default function AdminErrorBookError() {
+  return (
+    <div className="p-8">
+      <EmptyState
+        icon={BarChart3}
+        title="加载全校错题分析失败"
+        description="发生了一些错误，请刷新页面重试。"
+        action={{ label: "刷新页面", onClick: () => window.location.reload() }}
+        className="border-none shadow-none"
+      />
+    </div>
+  )
+}

src/app/(dashboard)/admin/error-book/loading.tsx

@@ -0,0 +1,23 @@
+import { Skeleton } from "@/shared/components/ui/skeleton"
+
+export default function AdminErrorBookLoading() {
+  return (
+    <div className="flex h-full flex-col space-y-8 p-8">
+      <div className="space-y-2">
+        <Skeleton className="h-8 w-[200px]" />
+        <Skeleton className="h-4 w-[300px]" />
+      </div>
+      <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-4">
+        {Array.from({ length: 4 }).map((_, idx) => (
+          <Skeleton key={idx} className="h-[120px] w-full rounded-md" />
+        ))}
+      </div>
+      <div className="grid gap-4 md:grid-cols-2">
+        {Array.from({ length: 2 }).map((_, idx) => (
+          <Skeleton key={idx} className="h-[300px] w-full rounded-md" />
+        ))}
+      </div>
+      <Skeleton className="h-[400px] w-full rounded-md" />
+    </div>
+  )
+}

src/app/(dashboard)/admin/error-book/page.tsx

@@ -0,0 +1,113 @@
+import type { JSX } from "react"
+import { BarChart3 } from "lucide-react"
+
+import { requirePermission } from "@/shared/lib/auth-guard"
+import { Permissions } from "@/shared/types/permissions"
+import { EmptyState } from "@/shared/components/ui/empty-state"
+
+import {
+  getStudentErrorBookSummaries,
+  getTopWrongQuestionsByStudentIds,
+  getKnowledgePointWeakness,
+  getSubjectErrorDistribution,
+  getStudentNameMap,
+  getAllStudentIds,
+} from "@/modules/error-book/data-access"
+import { ClassErrorBookOverview, StudentErrorTable } from "@/modules/error-book/components/class-error-overview"
+import { TopWrongQuestions } from "@/modules/error-book/components/top-wrong-questions"
+
+export const dynamic = "force-dynamic"
+
+export default async function AdminErrorBookPage(): Promise<JSX.Element> {
+  const ctx = await requirePermission(Permissions.ERROR_BOOK_ANALYTICS_READ)
+
+  if (ctx.dataScope.type !== "all") {
+    return (
+      <div className="flex h-full flex-col space-y-8 p-8">
+        <div>
+          <h1 className="text-2xl font-bold tracking-tight">全校错题分析</h1>
+          <p className="text-muted-foreground">查看全校学生的错题统计与薄弱知识点。</p>
+        </div>
+        <EmptyState
+          icon={BarChart3}
+          title="权限不足"
+          description="您没有权限查看全校错题分析数据。"
+          className="h-[360px] bg-card"
+        />
+      </div>
+    )
+  }
+
+  // 通过 data-access 层查询所有学生 ID（遵循三层架构，app 层不直接访问 DB）
+  const studentIds = await getAllStudentIds()
+
+  if (studentIds.length === 0) {
+    return (
+      <div className="flex h-full flex-col space-y-8 p-8">
+        <div>
+          <h1 className="text-2xl font-bold tracking-tight">全校错题分析</h1>
+          <p className="text-muted-foreground">查看全校学生的错题统计与薄弱知识点。</p>
+        </div>
+        <EmptyState
+          icon={BarChart3}
+          title="暂无学生数据"
+          description="系统中还没有学生用户，无法查看错题分析。"
+          className="h-[360px] bg-card"
+        />
+      </div>
+    )
+  }
+
+  // 限制查询数量，避免性能问题（取最近活跃的 500 名学生）
+  const limitedStudentIds = studentIds.slice(0, 500)
+
+  const [summaries, topWrongQuestions, weakKps, subjectDist, nameMap] = await Promise.all([
+    getStudentErrorBookSummaries(limitedStudentIds),
+    getTopWrongQuestionsByStudentIds(limitedStudentIds, 10),
+    getKnowledgePointWeakness(limitedStudentIds, 10),
+    getSubjectErrorDistribution(limitedStudentIds),
+    getStudentNameMap(limitedStudentIds),
+  ])
+
+  const studentsWithErrorBook = summaries.filter((s) => s.totalCount > 0)
+  const totalErrorItems = summaries.reduce((sum, s) => sum + s.totalCount, 0)
+  const averageMasteryRate = studentsWithErrorBook.length > 0
+    ? studentsWithErrorBook.reduce((sum, s) => sum + s.masteredRate, 0) / studentsWithErrorBook.length
+    : 0
+
+  const sortedSummaries = [...summaries]
+    .filter((s) => s.totalCount > 0)
+    .sort((a, b) => b.totalCount - a.totalCount)
+    .slice(0, 50)
+
+  return (
+    <div className="flex h-full flex-col space-y-8 p-8">
+      <div>
+        <h1 className="text-2xl font-bold tracking-tight">全校错题分析</h1>
+        <p className="text-muted-foreground">
+          全校错题统计与薄弱知识点分析，辅助教学决策。
+        </p>
+      </div>
+
+      <ClassErrorBookOverview
+        totalStudents={studentIds.length}
+        studentsWithErrorBook={studentsWithErrorBook.length}
+        totalErrorItems={totalErrorItems}
+        averageMasteryRate={averageMasteryRate}
+        topWeakKnowledgePoints={weakKps}
+        subjectDistribution={subjectDist}
+      />
+
+      <div className="space-y-4">
+        <h2 className="text-lg font-semibold">错题最多的学生 Top 50</h2>
+        <StudentErrorTable
+          students={sortedSummaries}
+          studentNames={nameMap}
+          basePath="/admin/error-book"
+        />
+      </div>
+
+      <TopWrongQuestions questions={topWrongQuestions} />
+    </div>
+  )
+}