[stooit]

Makes bun test && tsc --noEmit pass from the repo root (13/13 tests, 0 type errors).

• apps/web/src/lib/api.ts: useThrottle was renamed to useDebounce in @e2e/utils, so the import now uses the new name. It is still exported as useSearchDebounce.
• packages/ui Button: aria-label is now applied to the button. Icon-only buttons with no label fall back to "Button" and log a warning outside production.
• packages/ui DataTable: the sort toggle now uses a functional state updater, which fixes the stale closure.
• packages/utils formatDate: en-AU output now has an unpadded day, e.g. 1/03/2024.
• bunfig.toml: preloads packages/ui/test/setup.ts (happy-dom), so a plain bun test has a DOM.
• tsconfig.json: adds "types": ["bun-types"], which was already installed.

Assumptions

• The Button test requires a non-null aria-label even when none is passed. A generic fallback was chosen over an empty string so the button still has an accessible name.
• en-AU ICU zero-pads the day, so the day is converted to a number by hand. The / separator is hard-coded.
• The DataTable functional updater is the correct fix, although the existing test also passes without it.
• No test files were changed and no dependencies were added.