refactor: replace recursion with while loop in override

scripts/menus/6_core_config.sh

@@ -746,7 +746,10 @@ set_singbox_adv(){ #自定义singbox配置文件
 		echo "-----------------------------------------------"
 		echo -e "使用前请务必参考配置教程:\033[32;4m https://juewuy.github.io/nWTjEpkSK \033[0m"
 }
-override(){ #配置文件覆写
+
+# 配置文件覆写
+override() {
+    while true; do
         [ -z "$rule_link" ] && rule_link=1
         [ -z "$server_link" ] && server_link=1
         echo "-----------------------------------------------"
@@ -764,7 +767,8 @@ override(){ #配置文件覆写
         [ "$inuserguide" = 1 ] || echo -e " 0 返回上级菜单"
         read -p "请输入对应数字 > " num
         case "$num" in
-	0)
+        "" | 0)
+            break
             ;;
         1)
             if [ -n "$(pidof CrashCore)" ]; then
@@ -778,24 +782,19 @@ override(){ #配置文件覆写
             else
                 setport
             fi
-		override
             ;;
         2)
             setrules
-		override
             ;;
         3)
             setproxies
-		override
             ;;
         4)
             setgroups
-		override
             ;;
         5)
             echo "$crashcore" | grep -q 'singbox' && set_singbox_adv || set_clash_adv
             sleep 3
-		override
             ;;
         9)
             echo "-----------------------------------------------"
@@ -811,12 +810,14 @@ override(){ #配置文件覆写
                 echo "-----------------------------------------------"
                 echo -e "\033[32m设置成功！\033[0m"
             }
-		override
             ;;
         *)
             errornum
+            sleep 1
+            break
             ;;
         esac
+    done
 }
 
 gen_link_config(){ #选择在线规则