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/_pcb1_gndfan.json

@@ -0,0 +1 @@
+{"segs": [["GND", 1, 78.222, 35.226, 77.8, 35.4, 0.3], ["GND", 1, 108.215, 31.926, 107.2, 32.8, 0.3]], "vias": [["GND", 77.8, 35.4], ["GND", 107.2, 32.8]]}