【策划架构】Lua配置迁移：沙巴克组队旧档的版本升级链

local function load(actor, cfg)
    -- 旧档没有share字段，直接取nil进结算
    setplayvar(actor, "EXP_SHARE", cfg.share)
end

local MIGRATE = {
    [1] = function(c) c.share = c.share or 0; c.ver = 2 end,
    [2] = function(c) c.mode = c.mode or "avg"; c.ver = 3 end,
}
local function load(actor, cfg)
    cfg.ver = cfg.ver or 1
    while cfg.ver < 3 do
        MIGRATE[cfg.ver](cfg)         -- 逐级打补丁到最新
    end
    setplayvar(actor, "EXP_SHARE", cfg.share)
    sendmsg(actor, 1, "沙巴克组队配置已升至 v" .. cfg.ver)
end