【框架设计】强化系统：强化等级与失败保底

local STONE_PER_LEVEL = 4
function Strengthen.run(plr, slot)
    local item = plr.bag[slot]
    if not item or item.strengthen >= 15 then return false, "已达上限" end
    if not QF_CostItem(plr, BLACK_STONE, STONE_PER_LEVEL) then
        return false, "矿石不足"
    end
    item.strengthen = item.strengthen + 1
    QF_RecalcEquip(plr, slot)
    return true
end

local SUCCESS_RATE = { [7] = 0.8, [8] = 0.6, [9] = 0.45, [10] = 0.3 }
function Strengthen.tryLevel(plr, slot)
    local item = plr.bag[slot]
    local rate = SUCCESS_RATE[item.strengthen] or 1
    if not QF_CostItem(plr, BLACK_STONE, STONE_PER_LEVEL) then return false end
    if math.random() <= rate then
        item.strengthen = item.strengthen + 1
        item.blessing = 0
    else
        item.blessing = (item.blessing or 0) + 30
        if item.blessing >= 100 then
            item.strengthen = item.strengthen + 1
            item.blessing = 0
            QF_SendTip(plr, "祝福值已满，强化必定成功")
        end
    end
    QF_RecalcEquip(plr, slot)
    return true
end