自用的品质调整
Combines quality-tier management from Fewer Quality Tiers with a configurable quality probability multiplier, plus a disable-spoiling toggle for Space Age. 品质部分沿用 Fewer Quality Tiers（自由配置保留的品质等级 + 概率补偿），并加入品质产出倍率调整；同时提供取消变质的选项。
Small changes concerning balance, gameplay, or graphics.