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)/teacher/grades/entry/page.tsx

@@ -0,0 +1,52 @@
+import { db } from "@/shared/db"
+import { subjects } from "@/shared/db/schema"
+import { asc } from "drizzle-orm"
+import { getTeacherClasses } from "@/modules/classes/data-access"
+import { getClassStudentsForEntry } from "@/modules/grades/data-access"
+import { BatchGradeEntry } from "@/modules/grades/components/batch-grade-entry"
+
+export const dynamic = "force-dynamic"
+
+type SearchParams = { [key: string]: string | string[] | undefined }
+
+const getParam = (params: SearchParams, key: string) => {
+  const v = params[key]
+  return Array.isArray(v) ? v[0] : v
+}
+
+export default async function BatchEntryPage({ searchParams }: { searchParams: Promise<SearchParams> }) {
+  const sp = await searchParams
+
+  const defaultClassId = getParam(sp, "classId")
+  const defaultSubjectId = getParam(sp, "subjectId")
+
+  const [classes, allSubjects] = await Promise.all([
+    getTeacherClasses(),
+    db.query.subjects.findMany({ orderBy: [asc(subjects.order), asc(subjects.name)] }),
+  ])
+
+  const classOptions = classes.map((c) => ({ id: c.id, name: c.name }))
+  const subjectOptions = allSubjects.map((s) => ({ id: s.id, name: s.name }))
+
+  let students: Array<{ id: string; name: string; email: string }> = []
+  if (defaultClassId) {
+    students = await getClassStudentsForEntry(defaultClassId)
+  }
+
+  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">Batch Grade Entry</h2>
+        <p className="text-muted-foreground">Enter grades for all students in a class at once.</p>
+      </div>
+
+      <BatchGradeEntry
+        classes={classOptions}
+        subjects={subjectOptions}
+        students={students}
+        defaultClassId={defaultClassId}
+        defaultSubjectId={defaultSubjectId}
+      />
+    </div>
+  )
+}