【后端接口】师门任务刷新：日常师门任务的接口生成

-- 师门任务：梯度生成
local player = class(actor)
local POOL = {
    easy = {{"收集黑铁矿石", 5, 10}, {"递送师门信", 1, 1}},
    mid = {{"讨伐沃玛战士", 20, 40}, {"收集毒蛇胆", 8, 15}},
    hard = {{"讨伐沃玛教主之影", 1, 1}, {"收集祖玛头像", 2, 3}},
}
local function genDailyTasks(player)
    local plan = {easy = 3, mid = 4, hard = 3}
    local idx = 0
    for diff, cnt in pairs(plan) do
        for i = 1, cnt do
            idx = idx + 1
            local tpl = POOL[diff][math.random(1, #POOL[diff])]
            local need = math.random(tpl[2], tpl[3])
            setplayvar(player, "HUMAN", "Task_" .. idx, tpl[1] .. "|" .. need .. "|0", true)
        end
    end
    sendmsg(player, 1, 0, "今日师门任务已生成：共 10 环。")
end

-- 师门任务：提交与环奖
local player = class(actor)
local function submitTask(player, taskIdx)
    local data = getplayvar(player, "HUMAN", "Task_" .. taskIdx) or ""
    local name, need, done = string.match(data, "([^|]+)|(%d+)|(%d+)")
    done = tonumber(done or 0)
    if done < tonumber(need) then
        sendmsg(player, 1, 0, "任务未完成：" .. name .. " " .. done .. "/" .. need)
        return
    end
    giveitem(player, "师门俸禄", 1)
    setplayvar(player, "HUMAN", "Task_" .. taskIdx, name .. "|" .. need .. "|0|done", true)
    if taskIdx == 10 then
        giveitem(player, "师门宝匣", 1)
        sendcentermsg(player, 255, 0, "十环功德圆满，师门宝匣已赐下！", 0, 8)
    end
end