feat(alerts): 添加微信告警、WebSocket实时推送和地图功能

- 新增微信告警服务（wechat_service）和告警任务（alert_tasks）
- 新增 WebSocket 实时推送端点
- 新增监控管理模块（monitor）
- 增强统计仪表板：趋势图、区域分布、光功率历史
- 设备管理：添加坐标信息、标签系统、复合索引优化
- 前端：重构Dashboard/Charts页面，新增业务组件
- 新增5个数据库迁移（坐标、复合索引、标签、光功率历史、显示名）
- 更新部署配置和脚本
- 新增测试框架基础结构

backend/app/api/v1/monitor.py

@@ -0,0 +1,45 @@
+"""Celery 任务监控 API"""
+import time
+import redis as redis_lib
+from fastapi import APIRouter, Depends
+from app.core.celery_app import celery_app
+from app.core.config import settings
+from app.middleware.permission_middleware import require_permission
+
+router = APIRouter(prefix="/api/monitor", tags=["任务监控"])
+
+
+def _get_redis():
+    return redis_lib.from_url(settings.REDIS_URL, decode_responses=True)
+
+
+@router.get("/tasks")
+def get_task_status(_: dict = Depends(require_permission('*'))):
+    """获取 Celery 任务状态概览"""
+    try:
+        insp = celery_app.control.inspect()
+        active = insp.active() or {}
+        scheduled = insp.scheduled() or {}
+        reserved = insp.reserved() or {}
+
+        r = _get_redis()
+        last_run = r.get("check_all_devices:last_run")
+        is_running = bool(r.get("check_all_devices:running"))
+        interval_str = r.get("system:check_interval_seconds")
+
+        interval = int(interval_str) if interval_str else 1800
+        next_run = None
+        if last_run and not is_running:
+            next_run = float(last_run) + interval
+
+        return {
+            "workers": list(active.keys()),
+            "active_count": sum(len(v) for v in active.values()),
+            "scheduled_count": sum(len(v) for v in scheduled.values()),
+            "check_running": is_running,
+            "last_check": float(last_run) if last_run else None,
+            "next_check": next_run,
+            "check_interval_seconds": interval,
+        }
+    except Exception as e:
+        return {"error": str(e)}