敏感词打码：命中词的星号替换

-- 错误：只在发送时拦截，历史消息裸奔
function sendText(text)
    if hitWords(text) then return end
    pushMsg(text)
end

local WORDS = {"abc", "xyz"}
local function mask(text)
    for _, w in ipairs(WORDS) do
        text = text:gsub(w, string.rep("*", #w))
    end
    return text
end
local label = panel:getChildByName("chatLine")
label:setString(mask("see abc and xyz"))