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_sda_fix.json

@@ -0,0 +1 @@
+{"segs": [[2, 21.2, 43.0, 20.3, 43.0, 0.2, "SDA"], [2, 20.3, 43.0, 20.3, 41.6, 0.2, "SDA"]], "vias": [], "nets": {}, "logs": [], "pd_refs": []}