Adds Pest test suites for the four critical admin modals using test double
components, following the existing LivewireModalTest.php pattern. Covers
tab navigation, form validation, CRUD flows, filter combinations, and
state management. Fixes#7.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add tests for modal opening/closing, event handling, data passing,
validation, nested modals, and lifecycle management. Tests use
isolated test double components to verify modal behaviour patterns
used throughout core-admin.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>