fix: resolve cross-package test failures and type errors

[stooit]

Summary

Fixes all failing tests and type errors across the monorepo. Bugs spanned packages/utils, packages/ui, and apps/web. All changes are minimal and targeted; no test files were modified and no dependencies were added.

Final state: bun test → 13 pass / 0 fail, bunx tsc --noEmit → 0 errors.

Fixes

1. Renamed hook import (apps/web/src/lib/api.ts) — useThrottle was renamed to useDebounce in packages/utils; the consumer still imported the old name. Updated the import to match the real export (re-exported as useSearchDebounce).
2. Date formatter locale (packages/utils/src/format/date.ts) — explicit field options forced M/D/YYYY ordering regardless of locale. Switched to dateStyle: "short" so the locale controls D/M/Y ordering (e.g. 1 March 2024 → 1/3/..., not 3/1/...).
3. Accessibility attribute (packages/ui/src/components/Button/Button.tsx) — icon-only buttons now apply aria-label, as asserted by the Button test.
4. Stale-closure bug (packages/ui/src/components/DataTable/DataTable.tsx) — sort-direction toggle captured a stale value; replaced with a functional setState updater so it always reads committed state. Caught by a controlled re-render test.
5. Test DOM environment (bunfig.toml) — root bun test did not load a DOM environment, so component tests threw document is not defined. Wired the root config to preload the existing packages/ui/test/setup.ts.
6. Type globals (tsconfig.json) — added bun-types to types so tsc resolves the bun:test globals used in test files (type declarations were already installed; no new dependency).

Assumptions

• The test files are the source of truth for the correct public hook name and expected date format; consumer/source code was reconciled to them.
• The DOM preload setup file and bun-types were already present/installed, so wiring them required no new dependencies.

Testing

• bun test from repo root: 13 pass, 0 fail
• bunx tsc --noEmit from repo root: 0 errors
• Independent code review: all five fixes confirmed correct, minimal, and regression-free.