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iOS Safari 验证失败的根因是三重叠加：
1. tracker 没绑 touchmove {passive:false}+preventDefault → Safari 节流 touchmove
到十几 Hz 并抢占为页面滚动，采样点稀疏、零交叉率不足；
2. 没有越界 clamp → 大拇指接触面大、手指滑出画布下沿产生越界点，后端归一化
后跑到 [0,1]² 外与贝塞尔参考路径拉开 DTW 代价 → S_DTW 崩塌（log5 现象）；
3. DTW 没归一化 → 前后端画布尺寸不一致时坐标系错位 → S_DTW 崩塌。
这些修复此前全部在另一条未合并分支（7b63f30/3c7d8cd/0ae8c0f），dev 线缺失；
本次保留 dev 的预热机制移植过来，并回退上一版（cae7389）方向错误的
getCoalescedEvents 方案，改用经过 log5/log6 实测验证的完整方案。
改动：
- tracker.ts: touchmove 旁路 + 越界 clamp + stop() 脏点过滤 + touchActive 去重
- dtw.py: DTW 归一化到 [0,1]²，S_DTW 与画布尺寸解耦
- config.py/challenge.py/models.py/main.py: device 字段透传，按端选 PC/Mobile
画布（480/360）与 target_half（22/30），duration 5→6
- config.ts/api.ts/phantom.ts: isMobileViewport + device 传参 + 按视口设画布
- renderer.ts: canvas 尺寸改读 canvas.width/height（预热+渲染态同步）
- docker-compose/.env.example: 补 PC/Mobile 环境变量
- 测试: 新增 DTW 归一化自洽、device=mobile/pc 下发 3 个用例，16/16 全绿
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