fix: repair cross-package bugs failing tests and type checks

[stooit]

Summary

Fixes all failing tests and type errors across the monorepo (packages/ui, packages/utils, apps/web). The bugs spanned multiple packages: a hook rename, a locale/format mismatch, a missing a11y passthrough, a stale closure, and a missing TS types entry.

Result: 13/13 tests pass, tsc --noEmit clean (0 errors). No test files modified; no dependencies added.

Changes

File	Fix
apps/web/src/lib/api.ts	Hook renamed useThrottle → useDebounce in @e2e/utils; updated import and the useSearchDebounce re-export alias. Resolves the api.test.ts import failure and TS2305.
packages/utils/src/format/date.ts	formatDate uses en-AU with { dateStyle: "short" } — day-first, no leading zero (e.g. 1/03/2024). formatDateTime unchanged.
packages/ui/src/components/Button/Button.tsx	aria-label was destructured but never applied; now passed through to the <button> (always present for icon-only, per the test contract).
packages/ui/src/components/DataTable/DataTable.tsx	Stale-closure sort toggle fixed via functional state updater (prev => ...).
tsconfig.json	Added bun-types to compilerOptions.types so bun:test resolves under tsc.

Assumptions

• Canonical hook name is useDebounce (what packages/utils exports); consumer reconciled to it.
• Button test intentionally requires icon-only buttons to always carry a non-null aria-label (empty string acceptable): aria-label={iconOnly ? (ariaLabel ?? "") : ariaLabel}.
• en-AU dateStyle: "short" is the intended day-first format.

Verification

• bun run test → 13 pass, 0 fail
• npx tsc --noEmit → 0 errors
• No test files modified