```

feat(auth): 添加用户权限获取接口并完善JWT令牌角色信息

- 在JWT令牌中添加用户角色信息
- 新增get_my_permissions接口用于获取当前用户权限码列表
- 重构认证回调逻辑，增加错误日志记录
- 更新用户信息获取接口使用Authorization头验证
```

backend/app/api/v1/settings.py

@@ -0,0 +1,76 @@
+"""系统设置 API（仅管理员）"""
+import time
+import redis as redis_lib
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+from app.core.database import get_db
+from app.core.config import settings
+from app.middleware.permission_middleware import require_permission
+from app.models.setting import SystemSetting
+
+router = APIRouter(prefix="/api/settings", tags=["系统设置"])
+
+MIN_CHECK_INTERVAL = 300   # 5 分钟
+MAX_CHECK_INTERVAL = 86400  # 24 小时
+
+_INTERVAL_REDIS_KEY = "system:check_interval_seconds"
+
+
+def _get_redis():
+    return redis_lib.from_url(settings.REDIS_URL, decode_responses=True)
+
+
+@router.get("")
+def get_settings(
+    db: Session = Depends(get_db),
+    _: dict = Depends(require_permission('*')),
+):
+    """获取所有系统设置，附带下次扫描时间"""
+    rows = db.query(SystemSetting).all()
+    result = {row.key: {"value": row.value, "description": row.description} for row in rows}
+
+    # 计算下次扫描时间
+    try:
+        r = _get_redis()
+        interval_str = r.get(_INTERVAL_REDIS_KEY)
+        last_run_str = r.get("check_all_devices:last_run")
+        is_running = bool(r.get("check_all_devices:running"))
+        interval = int(interval_str) if interval_str else 1800
+        next_run_ts = (float(last_run_str) + interval) if last_run_str else None
+        result["next_check_at"] = {
+            "value": str(int(next_run_ts)) if next_run_ts else None,
+            "running": is_running,
+            "description": "下次扫描时间戳（Unix）"
+        }
+    except Exception:
+        result["next_check_at"] = {"value": None, "running": False, "description": "下次扫描时间戳（Unix）"}
+
+    return result
+
+
+@router.put("/check_interval")
+def update_check_interval(
+    seconds: int,
+    db: Session = Depends(get_db),
+    _: dict = Depends(require_permission('*')),
+):
+    """更新定时检查间隔（秒），范围 300~86400"""
+    if seconds < MIN_CHECK_INTERVAL:
+        raise HTTPException(status_code=400, detail=f"间隔不能小于 {MIN_CHECK_INTERVAL} 秒（5分钟）")
+    if seconds > MAX_CHECK_INTERVAL:
+        raise HTTPException(status_code=400, detail=f"间隔不能大于 {MAX_CHECK_INTERVAL} 秒（24小时）")
+
+    setting = db.query(SystemSetting).filter_by(key='check_interval_seconds').first()
+    if setting:
+        setting.value = str(seconds)
+    else:
+        db.add(SystemSetting(key='check_interval_seconds', value=str(seconds), description='定时检查间隔（秒）'))
+    db.commit()
+
+    # 同步到 Redis，让 Celery 任务立即生效
+    _get_redis().set(_INTERVAL_REDIS_KEY, str(seconds))
+
+    # 重置上次运行时间，让下次触发时立即按新间隔计算
+    _get_redis().delete("check_all_devices:last_run")
+
+    return {"key": "check_interval_seconds", "value": seconds}