Apply gofmt formatting to all Go files (#588)

## Summary
- Applied `gofmt -s -w` across the entire codebase to ensure consistent
Go formatting
- This will trigger a deployment with minimal code changes

## Test plan
- [x] Pre-commit hooks pass
- [x] No functional changes, formatting only

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <noreply@anthropic.com>

internal/api/handlers/v0/edit_test.go

@@ -639,4 +639,4 @@ func TestEditServerEndpointEdgeCases(t *testing.T) {
 // Helper function
 func stringPtr(s string) *string {
 	return &s
-}
+}