【Lua实战】模块化拆分：单文件脚本的功能边界治理

-- 三层拆分：模块划分示例
-- config_activity.lua
local CFG = {signDays = 3, rewardGold = 50000}
return CFG

-- logic_activity.lua
local CFG = require("config_activity")
local M = {}
function M.canSign(days)
    return days >= CFG.signDays
end
return M

-- view_activity.lua
local M = require("logic_activity")
local player = class(actor)
local function onTrySign(days)
    if M.canSign(days) then
        sendmsg(player, 1, 0, "签到达标，奖励已发放。")
    end
end

-- 共享函数库：common_util.lua
-- version: 1.4 使用方: 签到/押镖/矿洞
local U = {}
function U.safeNumber(v, default)
    local n = tonumber(v)
    if n == nil then return default end
    return n
end
function U.formatGold(n)
    return string.format("%.0f", n)
end
return U