【后端接口】装备图鉴：收集进度与图鉴奖励

local CODEX_REWARDS = { [5] = { item = "强化石礼包", n = 3 }, [15] = { item = "坐骑缰绳", n = 1 }, [30] = { item = "称号：收藏家", n = 1 } }
function Codex.onObtain(actor, itemId)
    if not CODEX_ITEMS[itemId] then return end
    local key = "codex_" .. itemId
    if getplayvar(actor, "HUMAN", key) == 1 then return end
    setplayvar(actor, "HUMAN", key, 1, 1)
    actor.codexCount = (actor.codexCount or 0) + 1
    local reward = CODEX_REWARDS[actor.codexCount]
    if reward then
        giveitem(actor, reward.item, reward.n, 1, "图鉴收集奖励")
        sendcentermsg(actor, 249, 0, "图鉴收集达到 " .. actor.codexCount .. " 件！", 0, 5, "")
    end
end

function Codex.query(actor)
    local total = 0
    for itemId, _ in pairs(CODEX_ITEMS) do total = total + 1 end
    local collected = 0
    for itemId, _ in pairs(CODEX_ITEMS) do
        local key = "codex_" .. itemId
        if getplayvar(actor, "HUMAN", key) == 1 then collected = collected + 1 end
    end
    return { total = total, collected = collected }
end