perf: replace multiple if statements with switch

model/option.go

@@ -1,7 +1,6 @@
 package model
 
 import (
-	"errors"
 	"message-pusher/common"
 	"strconv"
 	"strings"
@@ -55,10 +54,6 @@ func InitOptionMap() {
 }
 
 func UpdateOption(key string, value string) error {
-	if key == "StatEnabled" && value == "true" && !common.RedisEnabled {
-		return errors.New("未启用 Redis，无法启用统计功能")
-	}
-
 	// Save to database first
 	option := Option{
 		Key:   key,