feat(server-go): 和风天气接入与高发病天气预警规则（#12）

server-go/cmd/server/main.go

@@ -74,6 +74,7 @@ func main() {
 	transcodeSvc := service.NewTranscodeService(db, s3Svc)
 	aiSvc := service.NewAIClient(cfg.AIServiceBase)
 	wechatSvc := service.NewWechatService(cfg.WechatAppID, cfg.WechatSecret)
+	weatherSvc := service.NewWeatherService(cfg.QWeatherAPIKey, cfg.QWeatherLocation)
 
 	// 9. 创建 Gin 引擎
 	gin.SetMode(gin.ReleaseMode)
@@ -112,6 +113,10 @@ func main() {
 	handler.RegisterInspectionRoutes(api, db, s3Svc, aiSvc, cfg.S3BucketImages, wechatSvc, cfg.WechatTemplateInspection)
 	handler.RegisterTrayBatchRoutes(api, db)
 	handler.RegisterWechatRoutes(api, db, wechatSvc)
+	handler.RegisterWeatherRoutes(api, db, weatherSvc)
+
+	// 启动高发病天气预警定时任务（未配置时跳过）
+	go startWeatherAlertLoop(db, weatherSvc, time.Duration(cfg.QWeatherIntervalMin)*time.Minute)
 
 	// 启动后台设备状态同步（每 30 秒查询 WVP 设备在线状态）
 	go startDeviceStatusSync(db, mediaSvc)
@@ -179,3 +184,35 @@ func startDeviceStatusSync(db *gorm.DB, media *service.MediaService) {
 		}
 	}
 }
+
+// startWeatherAlertLoop 定期拉取天气并按规则写入 weather_alerts
+func startWeatherAlertLoop(db *gorm.DB, weather *service.WeatherService, interval time.Duration) {
+	if !weather.Configured() {
+		slog.Warn("天气服务未配置（QWEATHER_API_KEY/QWEATHER_LOCATION），跳过定时预警")
+		return
+	}
+	run := func() {
+		ctx := context.Background()
+		now, err := weather.FetchNow(ctx)
+		if err != nil {
+			slog.Warn("天气拉取失败", "err", err)
+			return
+		}
+		daily, err := weather.FetchDaily(ctx)
+		if err != nil {
+			slog.Warn("天气预报拉取失败", "err", err)
+			return
+		}
+		for _, a := range service.EvaluateWeatherRules(*now, daily, "") {
+			if err := db.Create(&a).Error; err != nil {
+				slog.Warn("天气预警写入失败", "disease", a.Disease, "err", err)
+			}
+		}
+	}
+	run()
+	ticker := time.NewTicker(interval)
+	defer ticker.Stop()
+	for range ticker.C {
+		run()
+	}
+}