【框架设计】符文系统：符文页配置与插槽共鸣

---镶嵌符文：slot 1~6
function Rune.embed(actor, slot, runeItemIdx)
    if slot < 1 or slot > 6 then
        sendmsg(actor, 1, "插槽编号非法")
        return false
    end
    local occupied = getplayvar(actor, 2, "RuneSlot" .. slot)
    if occupied and occupied ~= "" then
        sendmsg(actor, 1, "该插槽已有符文，请先拆卸")
        return false
    end
    delitembymakeindex(actor, runeItemIdx)
    setplayvar(actor, "HUMAN", "RuneSlot" .. slot, runeItemIdx, 1)
    Rune.resonance(actor)
    return true
end

---同系 3 颗触发共鸣：攻击 +5%
function Rune.resonance(actor)
    local series = {}
    for slot = 1, 6 do
        local idx = getplayvar(actor, 2, "RuneSlot" .. slot)
        local rune = idx and idx ~= "" and Rune.info(idx)
        if rune then
            series[rune.series] = (series[rune.series] or 0) + 1
        end
    end
    local bonus = 0
    for _, cnt in pairs(series) do
        if cnt >= 3 then bonus = bonus + 5 end
    end
    setplayvar(actor, "HUMAN", "RuneAtkPct", bonus, 1)
    if bonus > 0 then
        sendmsg(actor, 1, "符文共鸣生效，攻击提升 " .. bonus .. "%")
    end
end