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)/student/error-book/error.tsx

@@ -0,0 +1,19 @@
+"use client"
+
+import { BookX } from "lucide-react"
+
+import { EmptyState } from "@/shared/components/ui/empty-state"
+
+export default function StudentErrorBookError() {
+  return (
+    <div className="p-8">
+      <EmptyState
+        icon={BookX}
+        title="加载错题本失败"
+        description="发生了一些错误，请刷新页面重试。如果问题持续，请联系管理员。"
+        action={{ label: "刷新页面", onClick: () => window.location.reload() }}
+        className="border-none shadow-none"
+      />
+    </div>
+  )
+}