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/modules/grades/components/student-grade-summary.tsx

@@ -0,0 +1,117 @@
+import { Card, CardContent, CardHeader, CardTitle } from "@/shared/components/ui/card"
+import { Badge } from "@/shared/components/ui/badge"
+import {
+  Table,
+  TableBody,
+  TableCell,
+  TableHead,
+  TableHeader,
+  TableRow,
+} from "@/shared/components/ui/table"
+import { formatDate } from "@/shared/lib/utils"
+import { EmptyState } from "@/shared/components/ui/empty-state"
+import { GraduationCap } from "lucide-react"
+
+import type { StudentGradeSummary } from "../types"
+
+const typeColors: Record<string, "default" | "secondary" | "destructive" | "outline"> = {
+  exam: "default",
+  quiz: "secondary",
+  homework: "outline",
+  other: "outline",
+}
+
+export function StudentGradeSummary({ summary }: { summary: StudentGradeSummary | null }) {
+  if (!summary) {
+    return (
+      <EmptyState
+        title="No data"
+        description="Student grade summary is not available."
+        icon={GraduationCap}
+        className="border-none shadow-none"
+      />
+    )
+  }
+
+  return (
+    <div className="space-y-6">
+      <div className="grid grid-cols-1 gap-4 md:grid-cols-3">
+        <Card>
+          <CardHeader className="pb-2">
+            <CardTitle className="text-sm font-medium text-muted-foreground">Student</CardTitle>
+          </CardHeader>
+          <CardContent>
+            <p className="text-2xl font-bold">{summary.studentName}</p>
+          </CardContent>
+        </Card>
+        <Card>
+          <CardHeader className="pb-2">
+            <CardTitle className="text-sm font-medium text-muted-foreground">Average Score</CardTitle>
+          </CardHeader>
+          <CardContent>
+            <p className="text-2xl font-bold">{summary.averageScore.toFixed(2)}</p>
+          </CardContent>
+        </Card>
+        <Card>
+          <CardHeader className="pb-2">
+            <CardTitle className="text-sm font-medium text-muted-foreground">Total Records</CardTitle>
+          </CardHeader>
+          <CardContent>
+            <p className="text-2xl font-bold">{summary.records.length}</p>
+          </CardContent>
+        </Card>
+      </div>
+
+      {summary.records.length === 0 ? (
+        <EmptyState
+          title="No grades yet"
+          description="There are no grade records for this student."
+          icon={GraduationCap}
+          className="border-none shadow-none"
+        />
+      ) : (
+        <Card>
+          <CardHeader>
+            <CardTitle>Grade History</CardTitle>
+          </CardHeader>
+          <CardContent>
+            <div className="rounded-md border">
+              <Table>
+                <TableHeader>
+                  <TableRow>
+                    <TableHead>Title</TableHead>
+                    <TableHead>Class</TableHead>
+                    <TableHead>Subject</TableHead>
+                    <TableHead className="text-right">Score</TableHead>
+                    <TableHead>Type</TableHead>
+                    <TableHead>Semester</TableHead>
+                    <TableHead>Date</TableHead>
+                  </TableRow>
+                </TableHeader>
+                <TableBody>
+                  {summary.records.map((r) => (
+                    <TableRow key={r.id}>
+                      <TableCell className="font-medium">{r.title}</TableCell>
+                      <TableCell>{r.className}</TableCell>
+                      <TableCell>{r.subjectName}</TableCell>
+                      <TableCell className="text-right font-mono">
+                        {r.score} / {r.fullScore}
+                      </TableCell>
+                      <TableCell>
+                        <Badge variant={typeColors[r.type]} className="capitalize">
+                          {r.type}
+                        </Badge>
+                      </TableCell>
+                      <TableCell>S{r.semester}</TableCell>
+                      <TableCell className="text-muted-foreground">{formatDate(r.createdAt)}</TableCell>
+                    </TableRow>
+                  ))}
+                </TableBody>
+              </Table>
+            </div>
+          </CardContent>
+        </Card>
+      )}
+    </div>
+  )
+}