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/app/(dashboard)/parent/grades/page.tsx

@@ -1,7 +1,10 @@
 import { getAuthContext } from "@/shared/lib/auth-guard"
 import { getStudentGradeSummary } from "@/modules/grades/data-access"
 import { StudentGradeSummary } from "@/modules/grades/components/student-grade-summary"
-import { EmptyState } from "@/shared/components/ui/empty-state"
+import {
+  ParentChildrenDataPage,
+  ParentNoChildrenPage,
+} from "@/modules/parent/components/parent-children-data-page"
 import { GraduationCap } from "lucide-react"
 
 export const dynamic = "force-dynamic"
@@ -11,51 +14,41 @@ export default async function ParentGradesPage() {
 
   if (ctx.dataScope.type !== "children" || ctx.dataScope.childrenIds.length === 0) {
     return (
-      <div className="h-full flex-1 flex-col space-y-8 p-8 md:flex">
-        <div>
-          <h2 className="text-2xl font-bold tracking-tight">Children Grades</h2>
-          <p className="text-muted-foreground">View your children&apos;s grade records.</p>
-        </div>
-        <EmptyState
-          title="No children linked"
-          description="Your account is not linked to any student accounts yet. Please contact the school administrator."
-          icon={GraduationCap}
-          className="border-none shadow-none"
-        />
-      </div>
+      <ParentNoChildrenPage
+        title="Children Grades"
+        description="View your children's grade records."
+        icon={GraduationCap}
+        emptyTitle="No children linked"
+        emptyDescription="Your account is not linked to any student accounts yet. Please contact the school administrator."
+      />
     )
   }
 
-  const summaries = await Promise.all(
-    ctx.dataScope.childrenIds.map((id) => getStudentGradeSummary(id))
+  // 使用 allSettled 容错：单个子女查询失败不影响其他子女展示
+  const results = await Promise.allSettled(
+    ctx.dataScope.childrenIds.map((id) => getStudentGradeSummary(id)),
   )
-
-  const validSummaries = summaries.filter((s): s is NonNullable<typeof s> => s !== null)
+  const validSummaries = results
+    .filter(
+      (r): r is PromiseFulfilledResult<NonNullable<Awaited<ReturnType<typeof getStudentGradeSummary>>>> =>
+        r.status === "fulfilled" && r.value !== null,
+    )
+    .map((r) => r.value)
 
   return (
-    <div className="h-full flex-1 flex-col space-y-8 p-8 md:flex">
-      <div>
-        <h2 className="text-2xl font-bold tracking-tight">Children Grades</h2>
-        <p className="text-muted-foreground">View your children&apos;s grade records.</p>
-      </div>
-
-      {validSummaries.length === 0 ? (
-        <EmptyState
-          title="No grade records"
-          description="Your children don&apos;t have any grade records yet."
-          icon={GraduationCap}
-          className="border-none shadow-none"
-        />
-      ) : (
-        <div className="space-y-8">
-          {validSummaries.map((summary) => (
-            <div key={summary.studentId} className="space-y-4">
-              <h3 className="text-lg font-semibold border-b pb-2">{summary.studentName}</h3>
-              <StudentGradeSummary summary={summary} />
-            </div>
-          ))}
-        </div>
+    <ParentChildrenDataPage
+      title="Children Grades"
+      description="View your children's grade records."
+      icon={GraduationCap}
+      noRecordsTitle="No grade records"
+      noRecordsDescription="Your children don't have any grade records yet."
+      items={validSummaries}
+      renderItem={(summary) => (
+        <>
+          <h3 className="text-lg font-semibold border-b pb-2">{summary.studentName}</h3>
+          <StudentGradeSummary summary={summary} />
+        </>
       )}
-    </div>
+    />
   )
 }