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/child-card.tsx

@@ -4,24 +4,25 @@ import { ChevronRight, GraduationCap, PenTool, TriangleAlert } from "lucide-reac
 import { Avatar, AvatarFallback, AvatarImage } from "@/shared/components/ui/avatar"
 import { Badge } from "@/shared/components/ui/badge"
 import { Card, CardContent, CardHeader, CardTitle } from "@/shared/components/ui/card"
+import { cn, getInitials } from "@/shared/lib/utils"
 import type { ChildDashboardData } from "@/modules/parent/types"
 
-const getInitials = (name: string | null) => {
-  if (!name) return "S"
-  return name.slice(0, 2).toUpperCase()
-}
-
 export function ChildCard({ child }: { child: ChildDashboardData }) {
   const { basicInfo, homeworkSummary, gradeTrend } = child
   const ranking = gradeTrend.ranking
   const latestGrade = gradeTrend.recent[0]
+  const childName = basicInfo.name ?? "Child"
 
   return (
-    <Link href={`/parent/children/${basicInfo.id}`} className="block">
-      <Card className="hover:bg-muted/50 transition-colors cursor-pointer h-full">
+    <Link
+      href={`/parent/children/${basicInfo.id}`}
+      aria-label={`View ${childName}'s details`}
+      className="block focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 rounded-md"
+    >
+      <Card className="hover:bg-muted/50 transition-colors h-full">
         <CardHeader className="flex flex-row items-center gap-4 space-y-0">
           <Avatar className="h-12 w-12">
-            <AvatarImage src={basicInfo.image ?? undefined} alt={basicInfo.name ?? "Child"} />
+            <AvatarImage src={basicInfo.image ?? undefined} alt={childName} />
             <AvatarFallback>{getInitials(basicInfo.name)}</AvatarFallback>
           </Avatar>
           <div className="flex-1 min-w-0 space-y-1">
@@ -40,7 +41,7 @@ export function ChildCard({ child }: { child: ChildDashboardData }) {
         </CardHeader>
         <CardContent className="space-y-3">
           <div className="grid grid-cols-3 gap-2 text-center">
-            <div className="rounded-md border bg-card p-2">
+            <div className="rounded-md bg-muted/50 p-2">
               <div className="text-xs text-muted-foreground flex items-center justify-center gap-1">
                 <PenTool className="h-3 w-3" />
                 Pending
@@ -49,20 +50,21 @@ export function ChildCard({ child }: { child: ChildDashboardData }) {
                 {homeworkSummary.pendingCount}
               </div>
             </div>
-            <div className="rounded-md border bg-card p-2">
+            <div className="rounded-md bg-muted/50 p-2">
               <div className="text-xs text-muted-foreground flex items-center justify-center gap-1">
                 <TriangleAlert className="h-3 w-3" />
                 Overdue
               </div>
               <div
-                className={`text-lg font-semibold tabular-nums ${
-                  homeworkSummary.overdueCount > 0 ? "text-destructive" : ""
-                }`}
+                className={cn(
+                  "text-lg font-semibold tabular-nums",
+                  homeworkSummary.overdueCount > 0 && "text-destructive",
+                )}
               >
                 {homeworkSummary.overdueCount}
               </div>
             </div>
-            <div className="rounded-md border bg-card p-2">
+            <div className="rounded-md bg-muted/50 p-2">
               <div className="text-xs text-muted-foreground flex items-center justify-center gap-1">
                 <GraduationCap className="h-3 w-3" />
                 Avg
@@ -73,13 +75,12 @@ export function ChildCard({ child }: { child: ChildDashboardData }) {
             </div>
           </div>
           {latestGrade ? (
-            <div className="text-xs text-muted-foreground">
-              Latest:{" "}
-              <span className="font-medium text-foreground tabular-nums">
+            <div className="text-xs text-muted-foreground flex items-center gap-1">
+              <span className="shrink-0">Latest:</span>
+              <span className="font-medium text-foreground tabular-nums shrink-0">
                 {latestGrade.score}/{latestGrade.maxScore}
-              </span>{" "}
-              ({latestGrade.assignmentTitle.slice(0, 20)}
-              {latestGrade.assignmentTitle.length > 20 ? "..." : ""})
+              </span>
+              <span className="truncate">({latestGrade.assignmentTitle})</span>
             </div>
           ) : null}
         </CardContent>