feat: 完成 P1 全部功能 + 修复 proxy 导出 + 切换 MySQL 端口至 14013

## P1 功能（20 项）
- 站内消息系统、家长仪表盘、学生考勤管理
- Excel 导入导出、用户批量导入、成绩导出
- 排课规则+自动排课+课表调整
- 成绩趋势+对比分析、密码安全策略、速率限制
- 数据变更日志、文件预览+存储策略、全文检索
- 依赖审计集成 CI、数据库定时备份、E2E 测试完善
- 通知偏好管理

## 基础设施修复
- src/proxy.ts: 将 middleware 导出重命名为 proxy（Next.js 16 要求）
- .env: MySQL 端口从 13002 切换至 14013
- scripts/create-db.ts: 新增数据库初始化脚本

## 架构文档同步
- 004_architecture_impact_map.md 和 005_architecture_data.json
  完整记录所有新增表、模块、路由、权限、依赖关系

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

@@ -0,0 +1,61 @@
+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 { GraduationCap } from "lucide-react"
+
+export const dynamic = "force-dynamic"
+
+export default async function ParentGradesPage() {
+  const ctx = await getAuthContext()
+
+  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>
+    )
+  }
+
+  const summaries = await Promise.all(
+    ctx.dataScope.childrenIds.map((id) => getStudentGradeSummary(id))
+  )
+
+  const validSummaries = summaries.filter((s): s is NonNullable<typeof s> => s !== null)
+
+  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>
+      )}
+    </div>
+  )
+}