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-homework-summary.tsx

@@ -5,24 +5,40 @@ import { Badge } from "@/shared/components/ui/badge"
 import { Card, CardContent, CardHeader, CardTitle } from "@/shared/components/ui/card"
 import { EmptyState } from "@/shared/components/ui/empty-state"
 import { cn, formatDate } from "@/shared/lib/utils"
-import type { ChildHomeworkSummary } from "@/modules/parent/types"
+import type { StudentHomeworkProgressStatus } from "@/modules/homework/types"
+import type { ChildHomeworkSummaryData } from "@/modules/parent/types"
 
-const getStatusVariant = (status: string): "default" | "secondary" | "outline" => {
-  if (status === "graded") return "default"
-  if (status === "submitted" || status === "in_progress") return "secondary"
-  return "outline"
+const getStatusVariant = (
+  status: StudentHomeworkProgressStatus,
+): "default" | "secondary" | "outline" => {
+  switch (status) {
+    case "graded":
+      return "default"
+    case "submitted":
+    case "in_progress":
+      return "secondary"
+    case "not_started":
+      return "outline"
+  }
 }
 
-const getStatusLabel = (status: string) => {
-  if (status === "graded") return "Graded"
-  if (status === "submitted") return "Submitted"
-  if (status === "in_progress") return "In progress"
-  return "Not started"
+const getStatusLabel = (status: StudentHomeworkProgressStatus): string => {
+  switch (status) {
+    case "graded":
+      return "Graded"
+    case "submitted":
+      return "Submitted"
+    case "in_progress":
+      return "In progress"
+    case "not_started":
+      return "Not started"
+  }
 }
 
-const getDueUrgency = (dueAt: string | null) => {
+type DueUrgency = "overdue" | "urgent" | "normal"
+
+const getDueUrgency = (dueAt: string | null, now: Date): DueUrgency | null => {
   if (!dueAt) return null
-  const now = new Date()
   const due = new Date(dueAt)
   const diffHours = (due.getTime() - now.getTime()) / (1000 * 60 * 60)
   if (diffHours < 0) return "overdue"
@@ -35,11 +51,13 @@ export function ChildHomeworkSummary({
   childId,
   childName,
 }: {
-  summary: ChildHomeworkSummary
+  summary: ChildHomeworkSummaryData
   childId: string
   childName: string
 }) {
   const hasAssignments = summary.recentAssignments.length > 0
+  // hoist：在组件作用域计算一次 now，避免每次 map 迭代都 new Date()
+  const now = new Date()
 
   return (
     <Card>
@@ -51,19 +69,19 @@ export function ChildHomeworkSummary({
       </CardHeader>
       <CardContent className="space-y-4">
         <div className="grid grid-cols-2 md:grid-cols-4 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">Pending</div>
             <div className="text-lg font-semibold tabular-nums">{summary.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">Submitted</div>
             <div className="text-lg font-semibold tabular-nums">{summary.submittedCount}</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">Graded</div>
             <div className="text-lg font-semibold tabular-nums">{summary.gradedCount}</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
@@ -84,7 +102,7 @@ export function ChildHomeworkSummary({
             icon={PenTool}
             title="No assignments"
             description="No homework assigned right now."
-            className="border-none h-40"
+            className="border-none h-48"
           />
         ) : (
           <div className="space-y-2">
@@ -92,12 +110,12 @@ export function ChildHomeworkSummary({
               Recent Assignments
             </div>
             {summary.recentAssignments.map((a) => {
-              const urgency = getDueUrgency(a.dueAt)
+              const urgency = getDueUrgency(a.dueAt, now)
               const isGraded = a.progressStatus === "graded"
               return (
                 <Link
                   key={a.id}
-                  href={`/parent/children/${childId}`}
+                  href={`/parent/children/${childId}?tab=homework`}
                   className="flex items-center justify-between rounded-md border bg-card p-3 hover:bg-muted/50 transition-colors"
                 >
                   <div className="min-w-0 flex-1 space-y-1">
@@ -123,6 +141,12 @@ export function ChildHomeworkSummary({
                 </Link>
               )
             })}
+            <Link
+              href={`/parent/children/${childId}?tab=homework`}
+              className="block text-center text-xs text-muted-foreground hover:text-foreground transition-colors pt-1"
+            >
+              View all
+            </Link>
           </div>
         )}
       </CardContent>