Staggered stripes were spaced only so adjacent stripes touched
diagonally. When the in-stripe pitch stretched past sqrt(3)*D, stripes
two apart, which sit directly over each other, came closer than a
diameter. Clamp the stripe spacing to at least a radius in both fills.
FillEndOdd also divided by zero when a single circle fit per stripe;
it now stacks those stripes a diameter apart. FillEndEven now clones
the template item, so placed circles keep its radius instead of zero.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
