学生资料设置、头像与自动备份恢复。

首页卡片支持修改/删除；详情页设置 Tab 可维护学校、年级与头像；系统设置新增数据备份下载与恢复；备份默认存 /root/grade-archive-backups，详见 docs/BACKUP.md。

Co-authored-by: Cursor <cursoragent@cursor.com>

deploy/install.sh

@@ -149,6 +149,9 @@ POSTGRES_PASSWORD=${pg_pass}
 POSTGRES_DB=student_archive
 DATABASE_URL=postgresql://${pg_user}:${pg_pass}@127.0.0.1:5432/student_archive
 UPLOAD_DIR=${INSTALL_DIR}/uploads
+BACKUP_DIR=/root/grade-archive-backups
+BACKUP_RETENTION_DAYS=30
+AUTO_BACKUP_INTERVAL_HOURS=24
 CORS_ORIGINS=http://${server_ip}:${WEB_PORT},http://127.0.0.1:${WEB_PORT},http://localhost:${WEB_PORT}
 # OCR 同机 GPU Worker（screen 常驻）
 OCR_SERVICE_URL=http://127.0.0.1:${OCR_PORT}
@@ -237,10 +240,21 @@ setup_systemd() {
 start_service() {
   log_info "启动主程序…"
   cd "${INSTALL_DIR}"
-  mkdir -p uploads backups
+  mkdir -p uploads backups /root/grade-archive-backups
+  chmod +x deploy/backup.sh deploy/restore.sh 2>/dev/null || true
   systemctl restart grade-archive
 }
 
+setup_backup_cron() {
+  log_info "配置每日自动备份（/root/grade-archive-backups）…"
+  cat > /etc/cron.d/grade-archive-backup <<EOF
+SHELL=/bin/bash
+PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
+0 3 * * * root INSTALL_DIR=${INSTALL_DIR} BACKUP_DIR=/root/grade-archive-backups bash ${INSTALL_DIR}/deploy/backup.sh >> /var/log/grade-archive-backup.log 2>&1
+EOF
+  chmod 644 /etc/cron.d/grade-archive-backup
+}
+
 wait_healthy() {
   local i
   log_info "等待主程序就绪（最多 2 分钟）…"
@@ -285,6 +299,7 @@ print_summary() {
   echo ""
   echo "  主程序:   systemctl status grade-archive"
   echo "  更新:     sudo bash ${INSTALL_DIR}/deploy/update.sh"
+  echo "  备份说明: docs/BACKUP.md"
   echo "  卸载:     sudo bash ${INSTALL_DIR}/deploy/uninstall.sh"
   echo "  微信 dekun03  手机 18364911125"
   echo "=========================================="
@@ -305,6 +320,7 @@ main() {
   setup_ocr_gpu
   stop_legacy_pm2
   setup_systemd
+  setup_backup_cron
   start_service
   wait_healthy
   print_summary