Routing started and completed a main pass:
- Added 199 routing nodes.
- Renamed switches to RST_SW and BOOT_SW.
- Fixed the 12V regulator escape-width routing blocker.
- Set USB D+/D− nets to 0.15 mm trace width.
Remaining review issue: 4 USB D+/D− airwires at the USB-C connector/ESD path. A second cleanup routing pass added 0 nodes, so these likely need manual/targeted USB routing or a small USB connector/ESD placement adjustment.