Reveal a cut-off carousel item under reduced motion

Plan step 36 review of a149970d. Reduced motion writes a zero inset for
every item, so isMasked() never called one partly shown and a press on
an item the row cut off did nothing. It now reads the item's box against
the scrollport there, as it already did for multi-aspect, and the
browser test the rewrite added to document the gap asserts the reveal
instead (plan step 32's owed test).

A focused item's inset ring is 3px in again: Tailwind's
-outline-offset-3 is 3px, not the 12px the rewrite wrote.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9

tests/Feature/Components/CarouselTest.php

@@ -1,5 +1,6 @@
 <?php
 
+use Illuminate\Support\Facades\File;
 use NoNameWeb\LivewireMaterial\Tests\Support\ComponentStylesheet;
 
 it('is a carousel region of focusable slides named n of m', function () {
@@ -259,3 +260,8 @@ it('lets a multi-aspect carousel size each item by its own ratio, between 9:16 a
         ->and($item->declarations("[data-md-carousel='multi-aspect'] > [data-md-carousel-scroller] > [data-md-carousel-item]"))
         ->toBe(['width' => 'auto', 'border-radius' => 'var(--md-sys-shape-corner-xl)']);
 });
+
+it('rings a focused item 3px inside its edge, and reveals an item the row cuts off under reduced motion', function () {
+    expect(ComponentStylesheet::read('carousel-item')->declarations('[data-md-carousel-item]:focus-visible'))->toBe(['outline-offset' => '-3px'])
+        ->and(File::get(__DIR__.'/../../../resources/js/carousel.js'))->toContain('if (state.measured || state.reducedMotion.matches) {');
+});