【框架设计】结拜系统：结拜人数上限与称号加成

local SWORN_MIN, SWORN_MAX = 2, 5
function Sworn.invite(leader, target)
    if #leader.swornIds + 1 > SWORN_MAX then return false, "人数已满" end
    if target.swornIds and #target.swornIds > 0 then return false, "已有结义" end
    QF_SendConfirm(target, "结拜邀请", function(ok)
        if ok then Sworn.join(leader, target) end
    end)
    return true
end

function Sworn.join(leader, member)
    table.insert(leader.swornIds, member.id)
    table.insert(member.swornIds, leader.swornIds[1])
    for _, pid in ipairs(leader.swornIds) do
        local p = QF_GetPlayer(pid)
        Sworn.recalc(p)
        QF_SetTitle(p, "结义 · " .. #leader.swornIds .. "人")
    end
end

function Sworn.recalc(plr)
    local bonus = #plr.swornIds * 100
    plr.swornHp = bonus
end