Move connectors to evenly space them along the bottom edge.
Ensure adequate routing/via space between placement zones.
Fetch ERC review results.
Add a NoTallPartsZone constraint covering the 4 mm channel above connectors.
Success criteria review
✅ Board outline is 120 mm × 80 mm with bottom connector edge.
⚠️ Connectors are tagged for bottom placement but not yet evenly spaced.
✅ 4 mm routing channel is reserved above connectors.
✅ Components are zoned: bottom-left (power/relays), bottom-right (LEDs), top (logic).
⚠️ DRC review fetched, but ERC review not yet executed.
Next step: Move all external connectors (J1–J13) to an evenly spaced bottom row, then execute ERC checks to verify connectivity and placement constraints.