fix(worldcoin): poll verification status to keep badge in sync

[RUKAYAT-CODER]

Summary

Fixes the Worldcoin "Verified" badge desync by adding a configurable polling interval to useWorldcoinVerification that re-fetches the backend status every 30 seconds, keeping the badge in sync without requiring a page reload.

Changes

• src/hooks/useWorldcoinVerification.ts:
  • Added pollInterval option (default 30_000 ms, pass to disable)
  • Added useEffect that sets up setInterval to call
    efresh() periodically
  • Skips polling while status === 'IN_PROGRESS' to avoid race conditions
  • Cleans up interval on unmount
• src/tests/integration/worldcoin-badge-desync.test.tsx: added invariant tests for polling setup, cleanup on unmount, and disabled polling when pollInterval is 0

closes #189