feat: 新增备课模块并修复全模块 P0/P1/P2 缺陷

主要变更:

- 新增 lesson-preparation 模块: 备课编辑器、节点编辑、AI 建议、知识点选择、版本历史、作业发布

- 新增 shared 通用组件: charts/question-bank-filters/schedule-list/ui (chip-nav/filter-bar/page-header/stat-card/stat-item)

- 新增 student/admin 端 loading.tsx 与 error.tsx, 优化加载与错误态体验

- 新增 teacher/lesson-plans 页面 (列表/新建/编辑)

- 新增 drizzle 迁移 0002_tiny_lionheart 及 snapshot

- 新增 textbooks/schema.ts 与 exams/utils/normalize-structure.ts

- 修复 Tiptap v3 SSR hydration 崩溃 (rich-text-block immediatelyRender: false)

- 重构多模块 data-access/actions/组件, 修复权限校验与类型规范

- 同步架构文档 004/005 反映新增模块、导出、依赖关系

- 归档 bugs/* 测试报告与 e2e 测试脚本 (admin/parent/student/teacher web_test)

src/modules/parent/components/parent-dashboard.tsx

@@ -1,4 +1,5 @@
-import { CalendarDays, GraduationCap, Users } from "lucide-react"
+import Link from "next/link"
+import { CalendarCheck, CalendarDays, GraduationCap, Users } from "lucide-react"
 
 import { Button } from "@/shared/components/ui/button"
 import { EmptyState } from "@/shared/components/ui/empty-state"
@@ -19,7 +20,7 @@ export function ParentDashboard({ data }: { data: ParentDashboardData }) {
     <div className="space-y-6">
       <div className="flex flex-col justify-between gap-4 md:flex-row md:items-center">
         <div className="space-y-1">
-          <h1 className="text-3xl font-bold tracking-tight">Parent Dashboard</h1>
+          <h1 className="text-2xl font-bold tracking-tight">Parent Dashboard</h1>
           <div className="text-sm text-muted-foreground">
             {greeting}
             {parentName ? `, ${parentName}` : ""}. Here&apos;s an overview of your children.
@@ -27,16 +28,22 @@ export function ParentDashboard({ data }: { data: ParentDashboardData }) {
         </div>
         <div className="flex flex-wrap items-center gap-2">
           <Button asChild variant="outline" size="sm" className="gap-2">
-            <a href="/parent/grades">
+            <Link href="/parent/grades">
               <GraduationCap className="h-4 w-4" />
               Grades
-            </a>
+            </Link>
           </Button>
           <Button asChild variant="outline" size="sm" className="gap-2">
-            <a href="/announcements">
+            <Link href="/parent/attendance">
+              <CalendarCheck className="h-4 w-4" />
+              Attendance
+            </Link>
+          </Button>
+          <Button asChild variant="outline" size="sm" className="gap-2">
+            <Link href="/announcements">
               <CalendarDays className="h-4 w-4" />
               Announcements
-            </a>
+            </Link>
           </Button>
         </div>
       </div>
@@ -56,7 +63,7 @@ export function ParentDashboard({ data }: { data: ParentDashboardData }) {
               {children.length} {children.length === 1 ? "child" : "children"} linked
             </span>
           </div>
-          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
+          <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-4">
             {children.map((child) => (
               <ChildCard key={child.basicInfo.id} child={child} />
             ))}