Change shuriken logo from spin-on-click to spin-on-hover

Context

The shuriken logo on the home page currently spins on first load and when clicked. The user wants it to spin on hover instead of click.

Change

File: internal/render/templates/home.html (line 405)

Replace 'click' with 'mouseenter' in the event listener:

// Before
shuriken.addEventListener('click',spinShuriken);

// After
shuriken.addEventListener('mouseenter',spinShuriken);

The initial spin on page load (line 404) stays as-is.

Verification

1. make build to rebuild
2. Visit the home page — shuriken should spin on load, then again each time you hover over it
3. Clicking should no longer trigger a spin