feat(error-book): add analytics stats, charts, and error collection

- Add analytics-stats-cards, chapter-weakness-chart, class-error-bar-chart

- Add knowledge-point-weakness-chart, subject-distribution-chart, subject-tabs

- Add class-filter and grouped-student-error-table components

- Add data-access-collection for error aggregation from multiple sources

- Update error-book-detail-dialog, data-access, and types

src/modules/error-book/components/analytics-stats-cards.tsx

@@ -0,0 +1,97 @@
+import { BookOpen, Brain, CheckCircle2, Clock, TrendingUp } from "lucide-react"
+import { Card, CardContent } from "@/shared/components/ui/card"
+import { cn } from "@/shared/lib/utils"
+
+interface AnalyticsStatsCardsProps {
+  totalStudents: number
+  studentsWithErrorBook: number
+  totalErrorItems: number
+  averageMasteryRate: number
+  dueReviewCount: number
+  /** 涉及的知识点数 */
+  knowledgePointCount?: number
+  className?: string
+}
+
+/**
+ * 错题分析统计卡片（教师/管理员视图）
+ * 5 个卡片：覆盖学生/错题总数/平均掌握率/待复习/知识点数
+ */
+export function AnalyticsStatsCards({
+  totalStudents,
+  studentsWithErrorBook,
+  totalErrorItems,
+  averageMasteryRate,
+  dueReviewCount,
+  knowledgePointCount,
+  className,
+}: AnalyticsStatsCardsProps) {
+  const cards = [
+    {
+      label: "覆盖学生",
+      value: studentsWithErrorBook,
+      sub: `/ ${totalStudents} 人`,
+      icon: BookOpen,
+      color: "text-blue-600 dark:text-blue-400",
+      bg: "bg-blue-50 dark:bg-blue-950/30",
+    },
+    {
+      label: "错题总数",
+      value: totalErrorItems,
+      sub: `人均 ${(totalStudents > 0 ? totalErrorItems / totalStudents : 0).toFixed(1)} 题`,
+      icon: TrendingUp,
+      color: "text-rose-600 dark:text-rose-400",
+      bg: "bg-rose-50 dark:bg-rose-950/30",
+    },
+    {
+      label: "平均掌握率",
+      value: `${Math.round(averageMasteryRate * 100)}%`,
+      sub: averageMasteryRate >= 0.6 ? "整体良好" : "需加强",
+      icon: CheckCircle2,
+      color: "text-emerald-600 dark:text-emerald-400",
+      bg: "bg-emerald-50 dark:bg-emerald-950/30",
+    },
+    {
+      label: "待复习",
+      value: dueReviewCount,
+      sub: dueReviewCount > 0 ? "需要关注" : "无到期",
+      icon: Clock,
+      color: "text-amber-600 dark:text-amber-400",
+      bg: "bg-amber-50 dark:bg-amber-950/30",
+    },
+    {
+      label: "涉及知识点",
+      value: knowledgePointCount ?? 0,
+      sub: knowledgePointCount && knowledgePointCount > 5 ? "范围较广" : "集中",
+      icon: Brain,
+      color: "text-purple-600 dark:text-purple-400",
+      bg: "bg-purple-50 dark:bg-purple-950/30",
+    },
+  ]
+
+  return (
+    <div className={cn("grid gap-3 sm:grid-cols-2 lg:grid-cols-5", className)}>
+      {cards.map((card) => {
+        const Icon = card.icon
+        return (
+          <Card key={card.label} className="overflow-hidden">
+            <CardContent className="p-4">
+              <div className="flex items-start justify-between">
+                <div className="min-w-0 flex-1">
+                  <div className="text-xs text-muted-foreground">{card.label}</div>
+                  <div className={cn("mt-1 text-2xl font-bold", card.color)}>
+                    {card.value}
+                  </div>
+                  <div className="mt-0.5 text-xs text-muted-foreground">{card.sub}</div>
+                </div>
+                <div className={cn("rounded-lg p-2", card.bg)}>
+                  <Icon className={cn("h-4 w-4", card.color)} />
+                </div>
+              </div>
+            </CardContent>
+          </Card>
+        )
+      })}
+    </div>
+  )
+}