fix: Correct Arduino Shield footprint geometry and pin offsets

[BoozeLee]

Summary

• Corrected the Arduino Shield footprint to match the official Arduino Uno R3 mechanical specification
• Implemented the critical 4.064mm (160mil) gap between digital pins D7 and D8 — the non-standard spacing that makes Arduino shields mechanically unique
• Refactored ArduinoShieldFootprint.tsx from 329 lines of static pin definitions to ~60 lines using .map() for maintainability
• Updated pin labels in ArduinoShield.circuit.tsx for accuracy (RES→RESET, V3_3→3.3V, V5→5V, RX→D0, TX→D1)

Technical Details

The key fix is the 160mil gap calculation for the digital pin headers:

// Digital pins D8-D13+ are offset by 4.064mm (160mil) from D0-D7
pcbX = 24.13 - 7 * 2.54 - 4.064 - i * 2.54

Pin organization:

• Right side (top): D0-D7 at standard 2.54mm spacing
• Right side (bottom): D8-D13, GND, AREF, SDA, SCL with 4.064mm offset from D7
• Left side (top): A0-A5 at standard 2.54mm spacing
• Left side (bottom): NC, IOREF, RESET, 3.3V, 5V, GND1, GND2, VIN

Test plan

• Verify footprint renders correctly in tscircuit preview
• Confirm pin coordinates match Arduino Uno R3 specification sheet
• Validate that shields mechanically align with the generated footprint

🤖 Generated with Claude Code

[vercel]

@BoozeLee is attempting to deploy a commit to the tscircuit Team on Vercel.

A member of the Team first needs to authorize it.

[BoozeLee]

CI Fixes Needed

The PR is great but needs these CI fixes to pass:

Issues:

1. ❌ format-check - Code formatting
2. ❌ type-check - TypeScript validation
3. ❌ snapshot - Test snapshots need updating
4. ✅ tests - Already passing!

How to Fix:

# 1. Clone and checkout the PR branch
git fetch origin pull/68/head:fix-arduino-shield
git checkout fix-arduino-shield

# 2. Install dependencies
bun install

# 3. Fix formatting
bun run format

# 4. Check types (fix any errors that appear)
# May need to adjust types if errors show

# 5. Update snapshots
bun run snapshot:update

# 6. Verify all checks pass locally
bun run format:check  # Should pass
# Run type-check if available

# 7. Commit and push
git add .
git commit -m "fix: resolve CI failures (format, types, snapshots)"
git push

The Changes:

The actual Arduino Shield code looks good! The refactoring from 329 lines to ~60 lines using .map() is excellent. Just needs the above CI fixes to merge.

Note: These can be run in a GitHub Codespace for a clean environment with all dependencies.

[rushabhcodes]

create a pr with the fix, then @BoozeLee