Add unit tests for useCopyToClipboard hook

[aadorian]

Description

The useCopyToClipboard hook in hooks/copy-to-clipboard.ts handles clipboard writes and a 2-second "copied" feedback state, but has no tests.

Difficulty

Easy

Skills

Jest, React Testing Library (renderHook)

Relevant files

• hooks/copy-to-clipboard.ts
• hooks/__tests__/copy-to-clipboard.test.ts (create)

Tasks

• Create hooks/__tests__/copy-to-clipboard.test.ts
• Mock navigator.clipboard.writeText
• Test successful copy sets copied: true, then resets after timeout
• Test clipboard failure returns false and does not set copied

Acceptance Criteria

• All tests pass with npm test
• Clipboard API is mocked (no real clipboard access in CI)
• Use fake timers for the 2s reset behavior

Getting started

1. Comment on this issue to get assigned
2. Fork the repo and create a branch: test/copy-to-clipboard
3. Run npm ci && npm test before opening a PR