test: add unit tests for TransactionStatusIcon component

[Benedict315]

PR Description

Summary

I Add a subtle pending animation state for transaction rows by updating the pending transaction status icon.

What changed

• Updated TransactionStatusIcon.tsx
  • Added motion-safe:animate-pulse to pending status
  • Added motion-reduce:animate-none to respect reduced motion preferences
  • Removed direct animate-pulse from the icon element so animation is scoped correctly

Testing

• Added unit test: TransactionStatusIcon.test.tsx
  • Verifies pending status uses motion-safe pulse animation
  • Verifies pulse styling is removed when status updates to success

Notes

• Change is scoped to pending transaction status styling only
• No unrelated file churn was introduced
• Local validation requires dependencies installed, then run:
  • pnpm exec vitest run src/components/common/__tests__/TransactionStatusIcon.test.tsx
    closes Add subtle pulse state for pending transaction rows #163

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