【后端接口】triggerchat：聊天触发的敏感词与指令系统

---聊天触发 self:玩家 sMsg:内容 chat:频道 msgType:类型 返回 false 拦截
function triggerchat(actor, sMsg, chat, msgType)
    -- 聊天指令：以点号开头
    if string.sub(sMsg, 1, 1) == "." then
        local cmd = string.sub(sMsg, 2)
        if cmd == "签到" then
            doDailySign(actor)
            return false
        elseif cmd == "在线" then
            sendmsg(actor, 1, "当前在线 " .. getonlinecount() .. " 人")
            return false
        end
    end
    return true
end

function triggerchat(actor, sMsg, chat, msgType)
    -- 世界频道做敏感词与频率双重校验
    if chat == CHAT_WORLD then
        if Filter.check(sMsg) then
            sendmsg(actor, 1, "发言含违规内容")
            return false
        end
        if not RateLimit.allow(actor, "chat_world", 2) then
            return false
        end
    end
    return true
end