Add animated background with gradient orbs

[Muneerali199]

Summary

Create a subtle animated background component with floating gradient orbs for visual depth.

Tasks

• Create components/animated-background.tsx with:
  • 3-4 gradient orbs that float and pulse slowly
  • Soft blur on each orb
  • Colors derived from the brand palette (amber, green, blue)
  • pointer-events-none so they don't block interaction
• Integrate into app/layout.tsx as a background layer

Files to change

• components/animated-background.tsx (new, ~100 lines)
• app/layout.tsx (~5 lines added)

Acceptance criteria

• Orbs animate smoothly without impacting performance
• Content remains readable on top
• npm run build succeeds