chore(docs): 清掉过期核验图与一次性排查图，两份手写 HTML 移入 docs/

判据=既不是 arm/viewer/shot.py 当前视图、也不在 tests/baselines/ 关卡比对里、
且不被 README/docs/webapp/arm/tests 任何文本引用。

- docs/shots 删 133 张 + docs/section_p01_seam.svg，共 16.47 MB；剩 105 张
  正好等于关卡覆盖面（92 稳定 + 13 容差），基线文件零缺失
- 定位图 删 63 张历史落点，共 9.12 MB；只保留用户录屏 mp4
- 线束走线与总线拓扑设计方案.html / 螺丝采购清单.html 从仓根移入 docs/（逐字节相同，按 rename 记录）

关卡：数据 10 项 md5 一致、IK exact 逐字节一致、92/92 逐字节 + 13/13 容差全过。

docs/section_p01_seam.svg

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