后台：修复直播开播页空白（补全 watch 导入）；控制台展示应用带宽观测与 HTTP 流量统计

Made-with: Cursor

server/handlers/stats.go

@@ -8,6 +8,7 @@ import (
 	"go.mongodb.org/mongo-driver/v2/bson"
 
 	"yh_web/server/config"
+	"yh_web/server/pkg/traffic"
 
 	"github.com/gin-gonic/gin"
 )
@@ -30,5 +31,6 @@ func GetStats(c *gin.Context) {
 		"conversations": conversations,
 		"messages":      messages,
 		"files":         files,
+		"bandwidth":     traffic.Snapshot(),
 	})
 }