feat: 月差模块独立+阴影带分位数法+季节性历史折线

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- 新增 spread_from_db.py: 从MySQL动态计算月差，含标准月差对/主次月差对/历史同期序列
- 阴影带计算改为分位数+K缩放法: mid=Q50, low=Q(trim), high=Q(1-trim), widthScale=K/3
  上下沿各自取自数据分布，天然跟随季节性方向
- 月差图支持历史同期折线: 同一月份组合的多条历史合约对序列独立绘制
- 月差图滚动平均平滑(smooth_window=5): 消除价差固有日度抖动，不影响评分
- OI筛选仅用于确定面板展示的月差对，历史序列不过滤持仓
- 前端支持K值/trim实时调节，scoreFromCurrentBand动态计算得分

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Janecjn

2026-06-14 16:47:40 +08:00

parent 2c2ebd4c34

commit 94a230e485

3 changed files with 961 additions and 110 deletions

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基本面评分面板.html

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