Hide & Seek 2.0 — v1.5.1 (box-carry fix)

Hide & Seek 2.0 -- v1.5.1

▶ Live demo: https://gefaa.github.io/hide-and-seek-2/

A focused viewer fix found by watching full playbacks (not just single frames):

• Hiders now push carried boxes in front of them instead of standing inside
  the crate while hauling — the box was previously pinned to the carrier's exact
  position, so the agent disappeared into the box.
• Wider cooperative heavy-box flank so both pushers sit clearly beside the
  box, not overlapping it.
• Softer agent ground-glow so it no longer washes out capsules behind it.

CI and the GitHub Pages deploy are green.