L2.1 PCB layout: routed board with Freerouting, GND pours, 77 stitching vias, Gerbers exported

- Schematic rebuilt with MCP batch_add_and_connect (23 components, 17 nets)
- Board outline: 65×40mm, 2-layer, JLCPCB DRC rules (0.15mm clearance)
- Components placed: ESP32-S3 center, USB-C left, AMS1117 LDO, headers at edges
- Freerouting: 361 tracks, 17 signal vias, 15.7s autoroute
- GND copper pour on F.Cu + B.Cu, 77 stitching vias
- DRC: 208 violations (77 via_dangling = zone fill artifacts, resolve on KiCad GUI fill)
- Gerbers + drill + BOM + pick-and-place exported to gerbers/
- Netlist verified: 20 components, 16 nets all properly connected

esp32-s3-sensor-node.kicad_prl

@@ -67,9 +67,42 @@
     "version": 5
   },
   "net_inspector_panel": {
-    "col_hidden": [],
-    "col_order": [],
-    "col_widths": [],
+    "col_hidden": [
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false
+    ],
+    "col_order": [
+      0,
+      1,
+      2,
+      3,
+      4,
+      5,
+      6,
+      7,
+      8,
+      9
+    ],
+    "col_widths": [
+      156,
+      141,
+      103,
+      71,
+      103,
+      103,
+      103,
+      74,
+      103,
+      103
+    ],
     "custom_group_rules": [],
     "expanded_rows": [],
     "filter_by_net_name": true,
@@ -81,7 +114,7 @@
     "show_unconnected_nets": false,
     "show_zero_pad_nets": false,
     "sort_ascending": true,
-    "sorting_column": -1
+    "sorting_column": 0
   },
   "open_jobsets": [],
   "project": {