【入门夯实】Lua读时修复：裁决之杖仓库脏键的自愈

local function read(actor)
    local raw = getsysvar("BAG")
    for p in string.gmatch(raw, "[^,]+") do   -- 脏串解析直接炸
        tonumber(p) + 1
    end
end

local function read(actor)
    local raw = getsysvar("BAG")
    local nums, n = {}, 0
    for p in string.gmatch(raw, "%d+") do
        n = n + 1
        nums[n] = p                 -- 只收合法数字
    end
    local fixed = table.concat(nums, ",")
    if fixed ~= raw then
        setsysvarex("BAG", fixed, 1)   -- 修复回写，幂等
    end
    sendmsg(actor, 1, "裁决之杖仓库键已净 " .. n .. " 项")
    return nums
end