Summary

Fixes all failing bun test cases and tsc --noEmit errors across the monorepo. All bugs spanned package boundaries. No test files were modified and no dependencies were added.

Final state: 13 pass / 0 fail and tsc --noEmit exits clean.

Fixes

• apps/web/src/lib/api.ts — renamed-hook import. The hook was renamed to useDebounce in packages/utils, but apps/web still imported/re-exported the old name. Updated the import and re-export as export { useDebounce as useSearchDebounce } so the public useSearchDebounce name still resolves (satisfies apps/web/test/api.test.ts).
• bunfig.toml — test DOM environment. The root config used environment = "happy-dom", which is Vitest/Jest syntax that Bun ignores, so document was undefined and every React component test failed. Switched to Bun's [test] preload of the existing happy-dom setup so component tests get a DOM globally.
• packages/ui/.../Button.tsx — accessible name. Now forwards an explicit aria-label to the rendered <button>, and applies a default aria-label for iconOnly buttons that don't provide one (WCAG 2.2 SC 4.1.2).
• packages/utils/.../date.ts — locale/format. formatDate now produces a day-first DD/MM/YYYY (en-AU) string with an unpadded day and 4-digit year via Intl.DateTimeFormat.formatToParts (e.g. 15/6/2024, 1/3/2024), fixing the previous 01/03/2024 output.
• tsconfig.json — added DOM/test lib+types so tsc --noEmit is clean.

Notes / assumptions

• The task hinted at a DataTable "stale closure" bug. Investigation (and the passing controlled-re-render test, once the DOM env was fixed) showed the sort logic was already correct — the failure was purely the missing DOM environment. Left DataTable logic untouched.
• The date tests only assert the day portion; the DD/MM/YYYY 4-digit-year output was chosen to match the tests' stated intent while satisfying every assertion.
• iconOnly Button default aria-label falls back to a generic label when none is supplied.

Verification

• bun test → 13 pass, 0 fail
• bunx tsc --noEmit → exit 0