Each status (active / exhausted / revoked / expired) maps to a distinct
visual treatment via statusColor() — one focused test per branch
asserts the correct background class on a tbody element so the test
verifies user-observable behaviour rather than the internal switch.
Also covers: empty placeholder, loadError banner, filter chip
selection state, new-invite form toggle on button click, createError
message visibility inside the open form, created-invite success card
with shareable URL, revoke button gating to active invites only,
unlimited-uses display, no-expiry display.
16 tests, ~50 branches covered.
Refs #496.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
