R2：底板 / 刀片布局布线脚本、快照、截图与规划文档更新（含外壳、打印件、布线归档）

Co-Authored-By: Claude Opus 5.5 <[email protected]>

.claude/r2/_d16_gndfix.out.json

@@ -0,0 +1 @@
+{"segs": [[1, 35.499, 52.601, 35.625, 51.25, 0.3, "GND"], [2, 22.25, 87.3, 22.5, 88.0, 0.3, "GND"]], "vias": [[35.625, 51.25, "GND"], [22.5, 88.0, "GND"]], "logs": ["GND: J36.1 找不到落过孔的地方"]}