Stability sweep across demos and interactions

Recent work focused on runtime cleanup and interaction safety across the latest demos.

What changed

• Fixed a globe build regression caused by a duplicate uniforms declaration.
• Prevented orphaned animation loops in halo and god-rays after disconnect.
• Scoped keyboard and fullscreen shortcuts more carefully so typing and Escape handling stay predictable.
• Moved image-trail styling into shadow DOM-safe styles instead of relying on Tailwind classes.

Why it matters

These fixes reduce the kind of regressions that only show up after repeated remounts, keyboard use, or extended demo interaction. The result is a more reliable component browser and cleaner exported behavior for consumers.